[{"id":1771463,"web_url":"http://patchwork.ozlabs.org/comment/1771463/","msgid":"<20170919.163253.740450667943070639.davem@davemloft.net>","list_archive_url":null,"date":"2017-09-19T23:32:53","subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","submitter":{"id":15,"url":"http://patchwork.ozlabs.org/api/people/15/","name":"David Miller","email":"davem@davemloft.net"},"content":"From: Eric Dumazet \nDate: Tue, 19 Sep 2017 16:27:02 -0700\n\n> When rate of netns creation/deletion is high enough,\n> we observe softlockups in cleanup_net() caused by huge list\n> of netns and way too many rcu_barrier() calls.\n> \n> This patch series does some optimizations in kobject,\n> and add batching to tunnels so that netns dismantles are\n> less costly.\n ...\n\nSeries applied, thanks Eric.","headers":{"Return-Path":"","X-Original-To":"patchwork-incoming@ozlabs.org","Delivered-To":"patchwork-incoming@ozlabs.org","Authentication-Results":"ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=netdev-owner@vger.kernel.org;\n\treceiver=)","Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3xxfLd34Rmz9sPr\n\tfor ;\n\tWed, 20 Sep 2017 09:32:57 +1000 (AEST)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1751367AbdISXcz (ORCPT );\n\tTue, 19 Sep 2017 19:32:55 -0400","from shards.monkeyblade.net ([184.105.139.130]:51110 \"EHLO\n\tshards.monkeyblade.net\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1751309AbdISXcy (ORCPT\n\t); Tue, 19 Sep 2017 19:32:54 -0400","from localhost (74-93-104-98-Washington.hfc.comcastbusiness.net\n\t[74.93.104.98]) (using TLSv1 with cipher AES256-SHA (256/256 bits))\n\t(Client did not present a certificate)\n\t(Authenticated sender: davem-davemloft)\n\tby shards.monkeyblade.net (Postfix) with ESMTPSA id 16979102CDABA;\n\tTue, 19 Sep 2017 16:32:54 -0700 (PDT)"],"Date":"Tue, 19 Sep 2017 16:32:53 -0700 (PDT)","Message-Id":"<20170919.163253.740450667943070639.davem@davemloft.net>","To":"edumazet@google.com","Cc":"netdev@vger.kernel.org, ebiederm@xmission.com, eric.dumazet@gmail.com","Subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","From":"David Miller ","In-Reply-To":"<20170919232709.14690-1-edumazet@google.com>","References":"<20170919232709.14690-1-edumazet@google.com>","X-Mailer":"Mew version 6.7 on Emacs 25.2 / Mule 6.0 (HANACHIRUSATO)","Mime-Version":"1.0","Content-Type":"Text/Plain; charset=us-ascii","Content-Transfer-Encoding":"7bit","X-Greylist":"Sender succeeded SMTP AUTH, not delayed by\n\tmilter-greylist-4.5.12 (shards.monkeyblade.net\n\t[149.20.54.216]); Tue, 19 Sep 2017 16:32:54 -0700 (PDT)","Sender":"netdev-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"netdev@vger.kernel.org"}},{"id":1775383,"web_url":"http://patchwork.ozlabs.org/comment/1775383/","msgid":"<8edb310a-562d-bff1-0482-64314833e722@mellanox.com>","list_archive_url":null,"date":"2017-09-26T11:21:08","subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","submitter":{"id":68926,"url":"http://patchwork.ozlabs.org/api/people/68926/","name":"Tariq Toukan","email":"tariqt@mellanox.com"},"content":"On 20/09/2017 2:27 AM, Eric Dumazet wrote:\n> When rate of netns creation/deletion is high enough,\n> we observe softlockups in cleanup_net() caused by huge list\n> of netns and way too many rcu_barrier() calls.\n> \n> This patch series does some optimizations in kobject,\n> and add batching to tunnels so that netns dismantles are\n> less costly.\n> \n> IPv6 addrlabels also get a per netns list, and tcp_metrics\n> also benefit from batch flushing.\n> \n> This gives me one order of magnitude gain.\n> (~50 ms -> ~5 ms for one netns create/delete pair)\n> \n...\n> \n> Eric Dumazet (7):\n> kobject: add kobject_uevent_net_broadcast()\n> kobject: copy env blob in one go\n> kobject: factorize skb setup in kobject_uevent_net_broadcast()\n> ipv6: addrlabel: per netns list\n> tcp: batch tcp_net_metrics_exit\n> ipv6: speedup ipv6 tunnels dismantle\n> ipv4: speedup ipv6 tunnels dismantle\n> \n> include/net/ip_tunnels.h | 3 +-\n> include/net/netns/ipv6.h | 5 +++\n> lib/kobject_uevent.c | 94 ++++++++++++++++++++++++++----------------------\n> net/ipv4/ip_gre.c | 22 +++++-------\n> net/ipv4/ip_tunnel.c | 12 +++++--\n> net/ipv4/ip_vti.c | 7 ++--\n> net/ipv4/ipip.c | 7 ++--\n> net/ipv4/tcp_metrics.c | 14 +++++---\n> net/ipv6/addrlabel.c | 81 ++++++++++++++++-------------------------\n> net/ipv6/ip6_gre.c | 8 +++--\n> net/ipv6/ip6_tunnel.c | 20 ++++++-----\n> net/ipv6/ip6_vti.c | 23 +++++++-----\n> net/ipv6/sit.c | 9 +++--\n> 13 files changed, 157 insertions(+), 148 deletions(-)\n> \n\nHi Eric,\n\nWe see a regression introduced in this series, specifically in the \npatches touching lib/kobject_uevent.c.\nWe tried to figure out what is wrong there, but couldn't point it out.\n\nBug is that mlx4 driver restart fails, because mlx4_core is still in use.\nAccording to module dependencies, both mlx4_en and mlx4_ib should have \nbeen unloaded at this point\nPlease see log below.\n\nThis looks to be some kind of a race, as the repro is not deterministic.\nProbably the en/ib modules are now mistakenly reloaded.\n\nAny idea what could this be?\n\nRegards,\nTariq\n\n\n[root@reg-l-vrt-41016-009 ~]# /etc/init.d/openibd stop\nUnloading HCA driver: [ OK ]\n[root@reg-l-vrt-41016-009 ~]# /etc/init.d/openibd start\nLoading HCA driver and Access Layer: [ OK ]\n[root@reg-l-vrt-41016-009 ~]# /etc/init.d/openibd stop\nUnloading mlx4_core [FAILED]\nrmmod: ERROR: Module mlx4_core is in use","headers":{"Return-Path":"","X-Original-To":"patchwork-incoming@ozlabs.org","Delivered-To":"patchwork-incoming@ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; 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Miller\" ","Cc":"netdev ,\n\t\"Eric W . Biederman\" ,\n\tEric Dumazet , Majd Dibbiny ,\n\tYonatan Cohen ,\n\tEran Ben Elisha ","References":"<20170919232709.14690-1-edumazet@google.com>","From":"Tariq Toukan ","Message-ID":"<8edb310a-562d-bff1-0482-64314833e722@mellanox.com>","Date":"Tue, 26 Sep 2017 14:21:08 +0300","User-Agent":"Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101\n\tThunderbird/52.3.0","MIME-Version":"1.0","In-Reply-To":"<20170919232709.14690-1-edumazet@google.com>","Content-Type":"text/plain; charset=utf-8; format=flowed","Content-Language":"en-US","Content-Transfer-Encoding":"7bit","X-Originating-IP":"[193.47.165.251]","X-ClientProxiedBy":"AM5PR0602CA0014.eurprd06.prod.outlook.com\n\t(2603:10a6:203:a3::24) To AM4PR05MB1794.eurprd05.prod.outlook.com\n\t(2a01:111:e400:7a74::13)","X-MS-PublicTrafficType":"Email","X-MS-Office365-Filtering-Correlation-Id":"eccf7956-5a12-42db-83df-08d504d0b22b","X-MS-Office365-Filtering-HT":"Tenant","X-Microsoft-Antispam":"UriScan:; BCL:0; PCL:0;\n\tRULEID:(22001)(2017030254152)(48565401081)(2017052603199)(201703131423075)(201703031133081)(201702281549075);\n\tSRVR:AM4PR05MB1794; 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SFP:1101; SCL:1; SRVR:AM4PR05MB1794; H:[10.8.2.253];\n\tFPR:; SPF:None; PTR:InfoNoRecords; A:1; MX:1; LANG:en; ","Received-SPF":"None (protection.outlook.com: mellanox.com does not designate\n\tpermitted sender hosts)","SpamDiagnosticOutput":"1:99","SpamDiagnosticMetadata":"NSPM","X-OriginatorOrg":"Mellanox.com","X-MS-Exchange-CrossTenant-OriginalArrivalTime":"26 Sep 2017 11:21:12.4197\n\t(UTC)","X-MS-Exchange-CrossTenant-FromEntityHeader":"Hosted","X-MS-Exchange-CrossTenant-Id":"a652971c-7d2e-4d9b-a6a4-d149256f461b","X-MS-Exchange-Transport-CrossTenantHeadersStamped":"AM4PR05MB1794","Sender":"netdev-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"netdev@vger.kernel.org"}},{"id":1775442,"web_url":"http://patchwork.ozlabs.org/comment/1775442/","msgid":"","list_archive_url":null,"date":"2017-09-26T12:51:16","subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","submitter":{"id":13357,"url":"http://patchwork.ozlabs.org/api/people/13357/","name":"Eric Dumazet","email":"edumazet@google.com"},"content":"On Tue, Sep 26, 2017 at 4:21 AM, Tariq Toukan wrote:\n>\n>\n> Hi Eric,\n>\n> We see a regression introduced in this series, specifically in the patches\n> touching lib/kobject_uevent.c.\n> We tried to figure out what is wrong there, but couldn't point it out.\n>\n> Bug is that mlx4 driver restart fails, because mlx4_core is still in use.\n> According to module dependencies, both mlx4_en and mlx4_ib should have been\n> unloaded at this point\n> Please see log below.\n>\n> This looks to be some kind of a race, as the repro is not deterministic.\n> Probably the en/ib modules are now mistakenly reloaded.\n>\n> Any idea what could this be?\n>\n> Regards,\n> Tariq\n>\n>\n> [root@reg-l-vrt-41016-009 ~]# /etc/init.d/openibd stop\n> Unloading HCA driver: [ OK ]\n> [root@reg-l-vrt-41016-009 ~]# /etc/init.d/openibd start\n> Loading HCA driver and Access Layer: [ OK ]\n> [root@reg-l-vrt-41016-009 ~]# /etc/init.d/openibd stop\n> Unloading mlx4_core [FAILED]\n> rmmod: ERROR: Module mlx4_core is in use\n\nI have absolutely no idea. Please bisect.\n\nAre you really using netns in the first place ?","headers":{"Return-Path":"","X-Original-To":"patchwork-incoming@ozlabs.org","Delivered-To":"patchwork-incoming@ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=netdev-owner@vger.kernel.org;\n\treceiver=)","ozlabs.org; dkim=pass (2048-bit key;\n\tunprotected) header.d=google.com header.i=@google.com\n\theader.b=\"Uyde3dKd\"; dkim-atps=neutral"],"Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3y1gn5478Wz9tXn\n\tfor ;\n\tTue, 26 Sep 2017 22:51:21 +1000 (AEST)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S968823AbdIZMvT (ORCPT );\n\tTue, 26 Sep 2017 08:51:19 -0400","from mail-yw0-f181.google.com ([209.85.161.181]:55059 \"EHLO\n\tmail-yw0-f181.google.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S966144AbdIZMvS (ORCPT\n\t); Tue, 26 Sep 2017 08:51:18 -0400","by mail-yw0-f181.google.com with SMTP id w9so6965036ywi.11\n\tfor ; Tue, 26 Sep 2017 05:51:17 -0700 (PDT)","by 10.37.219.131 with HTTP; Tue, 26 Sep 2017 05:51:16 -0700 (PDT)"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=google.com; s=20161025;\n\th=mime-version:in-reply-to:references:from:date:message-id:subject:to\n\t:cc; bh=Tbe2Rag6+BxyO1j0Mi5CDN1p4eMQA+JeImbki6vlZa4=;\n\tb=Uyde3dKdJXxPqavUGNgNoE1lW1gdJoBzb9LCPb7WnP5nmw+7ouK+JN/CquOI32IGwv\n\tfVA38+ie5z3Qp3vq38Wmq8tPkx5Jjyw+QM877LZaE85trh/s+OmiWjMwlc6dkTF0xbzw\n\tT8FCDOZ5JgtmRNdrdfTc6JS1LofxFNfzBKIuFs98zcf8cXKF/c/tJTVCug9rPTXoYjWQ\n\tGsZvmJPZhE5ECn4eX50zEbbteGJ7ukjncWAggv7BT5FipBePKxP5qFXk4jRTTZMYCz9O\n\tZayekk5tZhmZkfDDDedTzDPtz/YNjX/hmyhesmpRDyovU3vTD/hYe9sGuITpy9y9VdrF\n\thVkQ==","X-Google-DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=1e100.net; s=20161025;\n\th=x-gm-message-state:mime-version:in-reply-to:references:from:date\n\t:message-id:subject:to:cc;\n\tbh=Tbe2Rag6+BxyO1j0Mi5CDN1p4eMQA+JeImbki6vlZa4=;\n\tb=GGgth3EBOcO3LB5VbxISbjrMb7p7rkyw4eJDw0bShKVpWgnL/A454hoQaDo+t9mSte\n\tKGRKEGJCvlL/UvtAid1e7PT3jGT0sLY4ZF1MaTvr/4r6MOXI+Bs54783Bd3CkZKgpwf4\n\tli0JuI+NVOhXJIo3iSI+OrxDrlhWsgzjtIcc619SZLJILKN0EY0XBQAklN4aOjMFTJHe\n\tjeVD1vn5PCmAlCazNpqqmSVxFYh+gh7NuZon/eYWCD7y+OyuekwwFd8UB5Y52fs717MX\n\tGtvNPEX7V+5qzIw71AzvBqqpW4A4rApkN0QpcPlvUoRgqtr4qz+kcVLQ7/1vUoio/ixF\n\ts+bg==","X-Gm-Message-State":"AHPjjUgr8aRVFkSelMduEeoGEsmI9PkVzheterAaE6um8FMsTCT21il4\n\tucdiGNVdqpfEWdCHb5R1j9olNRrOb61up3XHNfkwKA==","X-Google-Smtp-Source":"AOwi7QBixTUL2FByf48mN5PdwRYbOlYr91C+IMPqfQE+q9YfCXkewirxv1YPYSElfLDT9+Sfr/NzarI4sZPY7Z7lroM=","X-Received":"by 10.129.165.66 with SMTP id c63mr6487246ywh.143.1506430277247; \n\tTue, 26 Sep 2017 05:51:17 -0700 (PDT)","MIME-Version":"1.0","In-Reply-To":"<8edb310a-562d-bff1-0482-64314833e722@mellanox.com>","References":"<20170919232709.14690-1-edumazet@google.com>\n\t<8edb310a-562d-bff1-0482-64314833e722@mellanox.com>","From":"Eric Dumazet ","Date":"Tue, 26 Sep 2017 05:51:16 -0700","Message-ID":"","Subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","To":"Tariq Toukan ","Cc":"\"David S . Miller\" ,\n\tnetdev ,\n\t\"Eric W . Biederman\" ,\n\tEric Dumazet , Majd Dibbiny ,\n\tYonatan Cohen ,\n\tEran Ben Elisha ","Content-Type":"text/plain; charset=\"UTF-8\"","Sender":"netdev-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"netdev@vger.kernel.org"}},{"id":1775612,"web_url":"http://patchwork.ozlabs.org/comment/1775612/","msgid":"<266d30e7-5164-48e8-b802-56bb93558823@mellanox.com>","list_archive_url":null,"date":"2017-09-26T15:04:24","subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","submitter":{"id":68926,"url":"http://patchwork.ozlabs.org/api/people/68926/","name":"Tariq Toukan","email":"tariqt@mellanox.com"},"content":"On 26/09/2017 3:51 PM, Eric Dumazet wrote:\n> On Tue, Sep 26, 2017 at 4:21 AM, Tariq Toukan wrote:\n>>\n>> Hi Eric,\n>>\n>> We see a regression introduced in this series, specifically in the patches\n>> touching lib/kobject_uevent.c.\n>> We tried to figure out what is wrong there, but couldn't point it out.\n>>\n>> Bug is that mlx4 driver restart fails, because mlx4_core is still in use.\n>> According to module dependencies, both mlx4_en and mlx4_ib should have been\n>> unloaded at this point\n>> Please see log below.\n>>\n>> This looks to be some kind of a race, as the repro is not deterministic.\n>> Probably the en/ib modules are now mistakenly reloaded.\n>>\n>> Any idea what could this be?\n>>\n>> Regards,\n>> Tariq\n>>\n>>\n>> [root@reg-l-vrt-41016-009 ~]# /etc/init.d/openibd stop\n>> Unloading HCA driver: [ OK ]\n>> [root@reg-l-vrt-41016-009 ~]# /etc/init.d/openibd start\n>> Loading HCA driver and Access Layer: [ OK ]\n>> [root@reg-l-vrt-41016-009 ~]# /etc/init.d/openibd stop\n>> Unloading mlx4_core [FAILED]\n>> rmmod: ERROR: Module mlx4_core is in use\n> I have absolutely no idea. Please bisect.\nWe previously saw a similar issue, that was reported in mailing list.\nDmitry Torokhov suggested the following fix:\nhttps://lkml.org/lkml/2017/9/12/523\n\nAnd indeed, it solved the issue.\n\nWe kept the suggested patch in our internal branch, and rebased.\nIssue appeared again once your series was accepted.\n\nBy bisecting, we see that the issue re-appears in this patch:\n4a336a23d619 kobject: copy env blob in one go\n\n>\n> Are you really using netns in the first place ?\nNo. But seems like it still affects the modules load/unload.\n\nRegards,\nTariq","headers":{"Return-Path":"","X-Original-To":"patchwork-incoming@ozlabs.org","Delivered-To":"patchwork-incoming@ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=netdev-owner@vger.kernel.org;\n\treceiver=)","ozlabs.org; dkim=pass (1024-bit key;\n\tunprotected) header.d=Mellanox.com header.i=@Mellanox.com\n\theader.b=\"QnouJ+H/\"; dkim-atps=neutral","spf=none (sender IP is )\n\tsmtp.mailfrom=tariqt@mellanox.com; "],"Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3y1kky2rVZz9sP1\n\tfor ;\n\tWed, 27 Sep 2017 01:04:42 +1000 (AEST)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S968799AbdIZPEk (ORCPT );\n\tTue, 26 Sep 2017 11:04:40 -0400","from mail-db5eur01on0055.outbound.protection.outlook.com\n\t([104.47.2.55]:13131\n\t\"EHLO EUR01-DB5-obe.outbound.protection.outlook.com\"\n\trhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP\n\tid S967121AbdIZPEh (ORCPT );\n\tTue, 26 Sep 2017 11:04:37 -0400","from [10.8.2.253] (193.47.165.251) by\n\tHE1PR05MB1802.eurprd05.prod.outlook.com (2a01:111:e400:7a28::16) with\n\tMicrosoft SMTP Server (version=TLS1_2,\n\tcipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256) id 15.20.77.7;\n\tTue, 26 Sep 2017 15:04:29 +0000"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed; d=Mellanox.com;\n\ts=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version;\n\tbh=3IkTVkHPyOzGBFc+tmdUVWbu9yqEIQ/qhHfT6CyGaWE=;\n\tb=QnouJ+H/ttUPvh9gPJue4yoWJPkCILyhACLWGCombU+6fWG9PFVhkDkP80fthbWe3I57RM0bJDP9nZr4vdVjjF2Gyuq6G8J5sdjwcoDes6PSKBjSxcA7XfsB1yTmZPnOvaOFE4q1RkT7yDSyYHGjowEOGeMwHtLtArLNt2fmIaE=","Subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","To":"Eric Dumazet ,\n\tDmitry Torokhov ","Cc":"\"David S . Miller\" ,\n\tnetdev ,\n\t\"Eric W . Biederman\" ,\n\tEric Dumazet , Majd Dibbiny ,\n\tYonatan Cohen ,\n\tEran Ben Elisha ","References":"<20170919232709.14690-1-edumazet@google.com>\n\t<8edb310a-562d-bff1-0482-64314833e722@mellanox.com>\n\t","From":"Tariq Toukan ","Message-ID":"<266d30e7-5164-48e8-b802-56bb93558823@mellanox.com>","Date":"Tue, 26 Sep 2017 18:04:24 +0300","User-Agent":"Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101\n\tThunderbird/52.3.0","MIME-Version":"1.0","In-Reply-To":"","Content-Type":"text/plain; charset=utf-8; format=flowed","Content-Transfer-Encoding":"7bit","Content-Language":"en-US","X-Originating-IP":"[193.47.165.251]","X-ClientProxiedBy":"DB6PR07CA0139.eurprd07.prod.outlook.com\n\t(2603:10a6:6:16::32) To HE1PR05MB1802.eurprd05.prod.outlook.com\n\t(2a01:111:e400:7a28::16)","X-MS-PublicTrafficType":"Email","X-MS-Office365-Filtering-Correlation-Id":"60f73392-a9cd-4dbc-f4d4-08d504efe501","X-MS-Office365-Filtering-HT":"Tenant","X-Microsoft-Antispam":"UriScan:; BCL:0; PCL:0;\n\tRULEID:(22001)(2017030254152)(48565401081)(2017052603199)(201703131423075)(201703031133081)(201702281549075);\n\tSRVR:HE1PR05MB1802; 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SFP:1101; SCL:1; SRVR:HE1PR05MB1802; H:[10.8.2.253];\n\tFPR:; SPF:None; PTR:InfoNoRecords; MX:1; A:1; LANG:en; ","Received-SPF":"None (protection.outlook.com: mellanox.com does not designate\n\tpermitted sender hosts)","SpamDiagnosticOutput":"1:99","SpamDiagnosticMetadata":"NSPM","X-OriginatorOrg":"Mellanox.com","X-MS-Exchange-CrossTenant-OriginalArrivalTime":"26 Sep 2017 15:04:29.8597\n\t(UTC)","X-MS-Exchange-CrossTenant-FromEntityHeader":"Hosted","X-MS-Exchange-CrossTenant-Id":"a652971c-7d2e-4d9b-a6a4-d149256f461b","X-MS-Exchange-Transport-CrossTenantHeadersStamped":"HE1PR05MB1802","Sender":"netdev-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"netdev@vger.kernel.org"}},{"id":1775622,"web_url":"http://patchwork.ozlabs.org/comment/1775622/","msgid":"","list_archive_url":null,"date":"2017-09-26T15:13:21","subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","submitter":{"id":13357,"url":"http://patchwork.ozlabs.org/api/people/13357/","name":"Eric Dumazet","email":"edumazet@google.com"},"content":"On Tue, Sep 26, 2017 at 8:04 AM, Tariq Toukan wrote:\n>\n>\n> On 26/09/2017 3:51 PM, Eric Dumazet wrote:\n>>\n>> On Tue, Sep 26, 2017 at 4:21 AM, Tariq Toukan wrote:\n>>>\n>>>\n>>> Hi Eric,\n>>>\n>>> We see a regression introduced in this series, specifically in the\n>>> patches\n>>> touching lib/kobject_uevent.c.\n>>> We tried to figure out what is wrong there, but couldn't point it out.\n>>>\n>>> Bug is that mlx4 driver restart fails, because mlx4_core is still in use.\n>>> According to module dependencies, both mlx4_en and mlx4_ib should have\n>>> been\n>>> unloaded at this point\n>>> Please see log below.\n>>>\n>>> This looks to be some kind of a race, as the repro is not deterministic.\n>>> Probably the en/ib modules are now mistakenly reloaded.\n>>>\n>>> Any idea what could this be?\n>>>\n>>> Regards,\n>>> Tariq\n>>>\n>>>\n>>> [root@reg-l-vrt-41016-009 ~]# /etc/init.d/openibd stop\n>>> Unloading HCA driver: [ OK ]\n>>> [root@reg-l-vrt-41016-009 ~]# /etc/init.d/openibd start\n>>> Loading HCA driver and Access Layer: [ OK ]\n>>> [root@reg-l-vrt-41016-009 ~]# /etc/init.d/openibd stop\n>>> Unloading mlx4_core [FAILED]\n>>> rmmod: ERROR: Module mlx4_core is in use\n>>\n>> I have absolutely no idea. Please bisect.\n>\n> We previously saw a similar issue, that was reported in mailing list.\n> Dmitry Torokhov suggested the following fix:\n> https://lkml.org/lkml/2017/9/12/523\n>\n> And indeed, it solved the issue.\n>\n> We kept the suggested patch in our internal branch, and rebased.\n> Issue appeared again once your series was accepted.\n>\n> By bisecting, we see that the issue re-appears in this patch:\n> 4a336a23d619 kobject: copy env blob in one go\n>\n>>\n>> Are you really using netns in the first place ?\n>\n> No. But seems like it still affects the modules load/unload.\n>\n> Regards,\n> Tariq\n\nAh this makes sense now.\n\nDmitry Torokhov hack breaks the assumption I used in my patch.\n\nSince it is not upstream yet, I believe that it will need more work\nbefore being in a proper state.\n\nThanks.","headers":{"Return-Path":"","X-Original-To":"patchwork-incoming@ozlabs.org","Delivered-To":"patchwork-incoming@ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=netdev-owner@vger.kernel.org;\n\treceiver=)","ozlabs.org; dkim=pass (2048-bit key;\n\tunprotected) header.d=google.com header.i=@google.com\n\theader.b=\"HajioR0N\"; dkim-atps=neutral"],"Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3y1kx33d3Vz9t3x\n\tfor ;\n\tWed, 27 Sep 2017 01:13:27 +1000 (AEST)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S969700AbdIZPN0 (ORCPT );\n\tTue, 26 Sep 2017 11:13:26 -0400","from mail-yw0-f175.google.com ([209.85.161.175]:44000 \"EHLO\n\tmail-yw0-f175.google.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S969699AbdIZPNW (ORCPT\n\t); Tue, 26 Sep 2017 11:13:22 -0400","by mail-yw0-f175.google.com with SMTP id s62so7294500ywg.0\n\tfor ; Tue, 26 Sep 2017 08:13:22 -0700 (PDT)","by 10.37.219.131 with HTTP; Tue, 26 Sep 2017 08:13:21 -0700 (PDT)"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=google.com; s=20161025;\n\th=mime-version:in-reply-to:references:from:date:message-id:subject:to\n\t:cc; bh=dAZLzU208aNyZNIWaJFf66hBRZifNicaHLVd7HftqRU=;\n\tb=HajioR0NSwAS38EirbMPbGa214Sk6cEV4O8cB+rAuvPBZpzqDzSsQ7AOsvEmllg6J5\n\tVNQPcyo3TU5zHCzB9FuEsWesFh16pIAo1l9C9ZUV2dL8QyoGye0PF1U5GM+3ZuLe8MeM\n\tiLtTsVr7+k3g5BLSQT/mXlYFmFvqNSPLNQHjS6TvB7KLwft1egEltOUugRyBpufg7udl\n\ta1BYKNAbnv7PFY4qM8ODOmPGqofE8ZGJ6KwasiqSb6rmbxb2GYxrHNC6HG6ShHD3AMxT\n\tVAxI0Sr1Wa1zg/duxEjAfVd+VZ12Gj+wd78Y7gBa2L24lsDo1yCYDPYaEr6Bc1g3irsK\n\tC5wQ==","X-Google-DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=1e100.net; s=20161025;\n\th=x-gm-message-state:mime-version:in-reply-to:references:from:date\n\t:message-id:subject:to:cc;\n\tbh=dAZLzU208aNyZNIWaJFf66hBRZifNicaHLVd7HftqRU=;\n\tb=Ot8Wbzl8v2U9jTWr5hFkq6aZ8Elx/CLCCsn8If4xBIj8fnogejvdu8H4uIgAGZ7Li7\n\tg2s4rCChvFX4q5liyTmcozh591GuHMgOZmttqtm5og/MMEXS+uXkhDcZfeLF5mIv4Un2\n\tvxshT3vYUEane+AUrK7A8zr4av87WGtF1y4KWodZCQFpQD4ZvqBXuUS1T8oJ4enO0bHL\n\tp2wm9Cd/qXsNz7tpdWen8BH+Yyj2E8IGs8llFzoyW6nf+0NEKd8KWUbqU5kYJ0Y6TPVm\n\tR2hqpVeYo6eWVk+PUYVyfPGfBOkzhqJsUZdT1nv7887l8WDxD1o5mMUhPayy7sSXSfEF\n\tKvwQ==","X-Gm-Message-State":"AHPjjUjWR+m/grhXFCP8KYs2XsLoDVJn4npEwfhL7I+ahvNfseRC+M1a\n\t/SQGWGIZWUQkS0t0rI9HPN+l9BwbalwL61lYBTd1draEtvw=","X-Google-Smtp-Source":"AOwi7QBeJ+pREC16hSTnpD7goOvmrGMKMfsxhZq4iP3tIaL7wa37U1AW3Bgd8/IFDcVO8LFkHfMDFqcLz3H4jmhAvow=","X-Received":"by 10.37.16.193 with SMTP id 184mr6533169ybq.178.1506438801872; \n\tTue, 26 Sep 2017 08:13:21 -0700 (PDT)","MIME-Version":"1.0","In-Reply-To":"<266d30e7-5164-48e8-b802-56bb93558823@mellanox.com>","References":"<20170919232709.14690-1-edumazet@google.com>\n\t<8edb310a-562d-bff1-0482-64314833e722@mellanox.com>\n\t\n\t<266d30e7-5164-48e8-b802-56bb93558823@mellanox.com>","From":"Eric Dumazet ","Date":"Tue, 26 Sep 2017 08:13:21 -0700","Message-ID":"","Subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","To":"Tariq Toukan ","Cc":"Dmitry Torokhov ,\n\t\"David S . Miller\" ,\n\tnetdev ,\n\t\"Eric W . Biederman\" ,\n\tEric Dumazet , Majd Dibbiny ,\n\tYonatan Cohen ,\n\tEran Ben Elisha ","Content-Type":"text/plain; charset=\"UTF-8\"","Sender":"netdev-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"netdev@vger.kernel.org"}},{"id":1775631,"web_url":"http://patchwork.ozlabs.org/comment/1775631/","msgid":"<33E69A03-6594-423A-86E6-02029046BE7D@gmail.com>","list_archive_url":null,"date":"2017-09-26T15:22:39","subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","submitter":{"id":695,"url":"http://patchwork.ozlabs.org/api/people/695/","name":"Dmitry Torokhov","email":"dmitry.torokhov@gmail.com"},"content":"On September 26, 2017 8:13:21 AM PDT, Eric Dumazet wrote:\n>On Tue, Sep 26, 2017 at 8:04 AM, Tariq Toukan \n>wrote:\n>>\n>>\n>> On 26/09/2017 3:51 PM, Eric Dumazet wrote:\n>>>\n>>> On Tue, Sep 26, 2017 at 4:21 AM, Tariq Toukan \n>wrote:\n>>>>\n>>>>\n>>>> Hi Eric,\n>>>>\n>>>> We see a regression introduced in this series, specifically in the\n>>>> patches\n>>>> touching lib/kobject_uevent.c.\n>>>> We tried to figure out what is wrong there, but couldn't point it\n>out.\n>>>>\n>>>> Bug is that mlx4 driver restart fails, because mlx4_core is still\n>in use.\n>>>> According to module dependencies, both mlx4_en and mlx4_ib should\n>have\n>>>> been\n>>>> unloaded at this point\n>>>> Please see log below.\n>>>>\n>>>> This looks to be some kind of a race, as the repro is not\n>deterministic.\n>>>> Probably the en/ib modules are now mistakenly reloaded.\n>>>>\n>>>> Any idea what could this be?\n>>>>\n>>>> Regards,\n>>>> Tariq\n>>>>\n>>>>\n>>>> [root@reg-l-vrt-41016-009 ~]# /etc/init.d/openibd stop\n>>>> Unloading HCA driver: [ OK ]\n>>>> [root@reg-l-vrt-41016-009 ~]# /etc/init.d/openibd start\n>>>> Loading HCA driver and Access Layer: [ OK ]\n>>>> [root@reg-l-vrt-41016-009 ~]# /etc/init.d/openibd stop\n>>>> Unloading mlx4_core [FAILED]\n>>>> rmmod: ERROR: Module mlx4_core is in use\n>>>\n>>> I have absolutely no idea. Please bisect.\n>>\n>> We previously saw a similar issue, that was reported in mailing list.\n>> Dmitry Torokhov suggested the following fix:\n>> https://lkml.org/lkml/2017/9/12/523\n>>\n>> And indeed, it solved the issue.\n>>\n>> We kept the suggested patch in our internal branch, and rebased.\n>> Issue appeared again once your series was accepted.\n>>\n>> By bisecting, we see that the issue re-appears in this patch:\n>> 4a336a23d619 kobject: copy env blob in one go\n>>\n>>>\n>>> Are you really using netns in the first place ?\n>>\n>> No. But seems like it still affects the modules load/unload.\n>>\n>> Regards,\n>> Tariq\n>\n>Ah this makes sense now.\n>\n>Dmitry Torokhov hack breaks the assumption I used in my patch.\n>\n>Since it is not upstream yet, I believe that it will need more work\n>before being in a proper state.\n\nIt is in Greg's tree where all kobject patches should go through as far as I know.\n\n\nThanks.","headers":{"Return-Path":"","X-Original-To":"patchwork-incoming@ozlabs.org","Delivered-To":"patchwork-incoming@ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=netdev-owner@vger.kernel.org;\n\treceiver=)","ozlabs.org;\n\tdkim=fail reason=\"signature verification failed\" (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"DvfXNBBb\"; dkim-atps=neutral"],"Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3y1l7s62PJz9t3x\n\tfor ;\n\tWed, 27 Sep 2017 01:22:49 +1000 (AEST)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S969770AbdIZPWs (ORCPT );\n\tTue, 26 Sep 2017 11:22:48 -0400","from mail-pg0-f65.google.com ([74.125.83.65]:36578 \"EHLO\n\tmail-pg0-f65.google.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S964826AbdIZPWq (ORCPT\n\t); Tue, 26 Sep 2017 11:22:46 -0400","by mail-pg0-f65.google.com with SMTP id d8so6948568pgt.3\n\tfor ; Tue, 26 Sep 2017 08:22:46 -0700 (PDT)","from ?IPv6:2607:fb90:a511:8414:280d:47d9:c19:fc9?\n\t([2607:fb90:a511:8414:280d:47d9:c19:fc9])\n\tby smtp.gmail.com with ESMTPSA id\n\tv70sm4985303pfa.173.2017.09.26.08.22.44\n\t(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);\n\tTue, 26 Sep 2017 08:22:45 -0700 (PDT)"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=gmail.com; s=20161025;\n\th=date:user-agent:in-reply-to:references:mime-version\n\t:content-transfer-encoding:subject:to:cc:from:message-id;\n\tbh=hf0lmdjh24DevuVDtYjQaL8x7jvYFR2Dxvf7ZGh4jcg=;\n\tb=DvfXNBBbGJtUmVDmlCTLoQewM3jspcgI4U5PX0TbovczCB/ADr1BB8+kzka2rDww8/\n\txXguSpZWiYgTdp/cnmNfdLQNzpHefsjcrc/6dsj+o8t60XWdxKz9T6djlHkKgJ4qE4Qa\n\tiisiJraap56RBUaf7CuIa+pq5tFU53wvH1wsFhhgBixCdSBB/bVcoATCWVb4Jw+j8JdT\n\tCT3QMql9xS8yWI4D5lQ/NmggMYnFVPLs70i88EBrCm+W/zZj0jHmqAQRAjC9HjgN1MMN\n\txqApsPlnxypYzI1UPiVHPjB+qpGXoitLwxvfnjiXfzjJilekRI2OiyHPxtn1pG4eebIG\n\tYLYA==","X-Google-DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=1e100.net; s=20161025;\n\th=x-gm-message-state:date:user-agent:in-reply-to:references\n\t:mime-version:content-transfer-encoding:subject:to:cc:from\n\t:message-id;\n\tbh=hf0lmdjh24DevuVDtYjQaL8x7jvYFR2Dxvf7ZGh4jcg=;\n\tb=GDmpJ1FYWB6zW1/XxPGJ7Vxk9VBEFG2Rs48s507Lw0djbYUtu+KS9wS863jGk239/h\n\tGViKVzfsFiRzhG4mmhOMjRGHjbdnHN2f+5PpIdyQeNzf5ckU9IZN7WTHJJbXhgo3axEu\n\tDJ1L9Uu6Y+/keB3kKEYzR2hWiiVuyaH9iJMWp8Y17KhydtMAGVq0WlNQJsXjkEO83ppX\n\tXjd1SqvCucMkj+tIBEDwv7eSWOqitgiw0R7jcuuCXpHL+sA1E+qf862T0rb1PzpNVll9\n\teBMGKrd0Xe32PpW5NEBy/qlIVaLJKnztTUJsFM+vQAZrC1WAvSxzqCj7jdLBKX7kufjb\n\tqoxQ==","X-Gm-Message-State":"AHPjjUj8fHRm92YEWPENjfrS5t+2K4fOtPHyafQ2it7nPT6mAcZcQMe/\n\tCtSyY9WxxW95rj1LUljBpKA=","X-Google-Smtp-Source":"AOwi7QBXNH2D32ofhsLvCrS0Y7A43Hm7pekb4FejkNvyO4FVPm3tOAR0YJKVM9uER3aCKJCy8Yp0lQ==","X-Received":"by 10.99.36.66 with SMTP id k63mr11604167pgk.223.1506439365777; \n\tTue, 26 Sep 2017 08:22:45 -0700 (PDT)","Date":"Tue, 26 Sep 2017 08:22:39 -0700","User-Agent":"K-9 Mail for Android","In-Reply-To":"","References":"<20170919232709.14690-1-edumazet@google.com>\n\t<8edb310a-562d-bff1-0482-64314833e722@mellanox.com>\n\t\n\t<266d30e7-5164-48e8-b802-56bb93558823@mellanox.com>\n\t","MIME-Version":"1.0","Content-Type":"text/plain;\n charset=utf-8","Content-Transfer-Encoding":"quoted-printable","Subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","To":"Eric Dumazet , Tariq Toukan ","CC":"\"David S . Miller\" ,\n\tnetdev ,\n\t\"Eric W . Biederman\" ,\n\tEric Dumazet , Majd Dibbiny ,\n\tYonatan Cohen ,\n\tEran Ben Elisha ","From":"Dmitry Torokhov ","Message-ID":"<33E69A03-6594-423A-86E6-02029046BE7D@gmail.com>","Sender":"netdev-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"netdev@vger.kernel.org"}},{"id":1775636,"web_url":"http://patchwork.ozlabs.org/comment/1775636/","msgid":"","list_archive_url":null,"date":"2017-09-26T15:26:41","subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","submitter":{"id":68926,"url":"http://patchwork.ozlabs.org/api/people/68926/","name":"Tariq Toukan","email":"tariqt@mellanox.com"},"content":"On 26/09/2017 6:13 PM, Eric Dumazet wrote:\n> On Tue, Sep 26, 2017 at 8:04 AM, Tariq Toukan wrote:\n>>\n>> On 26/09/2017 3:51 PM, Eric Dumazet wrote:\n>>> On Tue, Sep 26, 2017 at 4:21 AM, Tariq Toukan wrote:\n>>>>\n>>>> Hi Eric,\n>>>>\n>>>> We see a regression introduced in this series, specifically in the\n>>>> patches\n>>>> touching lib/kobject_uevent.c.\n>>>> We tried to figure out what is wrong there, but couldn't point it out.\n>>>>\n>>>> Bug is that mlx4 driver restart fails, because mlx4_core is still in use.\n>>>> According to module dependencies, both mlx4_en and mlx4_ib should have\n>>>> been\n>>>> unloaded at this point\n>>>> Please see log below.\n>>>>\n>>>> This looks to be some kind of a race, as the repro is not deterministic.\n>>>> Probably the en/ib modules are now mistakenly reloaded.\n>>>>\n>>>> Any idea what could this be?\n>>>>\n>>>> Regards,\n>>>> Tariq\n>>>>\n>>>>\n>>>> [root@reg-l-vrt-41016-009 ~]# /etc/init.d/openibd stop\n>>>> Unloading HCA driver: [ OK ]\n>>>> [root@reg-l-vrt-41016-009 ~]# /etc/init.d/openibd start\n>>>> Loading HCA driver and Access Layer: [ OK ]\n>>>> [root@reg-l-vrt-41016-009 ~]# /etc/init.d/openibd stop\n>>>> Unloading mlx4_core [FAILED]\n>>>> rmmod: ERROR: Module mlx4_core is in use\n>>> I have absolutely no idea. Please bisect.\n>> We previously saw a similar issue, that was reported in mailing list.\n>> Dmitry Torokhov suggested the following fix:\n>> https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Flkml.org%2Flkml%2F2017%2F9%2F12%2F523&data=02%7C01%7Ctariqt%40mellanox.com%7C4a275c766aeb4224376e08d504f12193%7Ca652971c7d2e4d9ba6a4d149256f461b%7C0%7C0%7C636420356043309380&sdata=GGeDFkX277R%2BKShsUPsePoAD6p5yaO2v0CteABtCrcY%3D&reserved=0\n>>\n>> And indeed, it solved the issue.\n>>\n>> We kept the suggested patch in our internal branch, and rebased.\n>> Issue appeared again once your series was accepted.\n>>\n>> By bisecting, we see that the issue re-appears in this patch:\n>> 4a336a23d619 kobject: copy env blob in one go\n>>\n>>> Are you really using netns in the first place ?\n>> No. But seems like it still affects the modules load/unload.\n>>\n>> Regards,\n>> Tariq\n> Ah this makes sense now.\n>\n> Dmitry Torokhov hack breaks the assumption I used in my patch.\n>\n> Since it is not upstream yet, I believe that it will need more work\n> before being in a proper state.\n>\n> Thanks.\nI see. Thanks for the clarification.\nI guess we'll keep only one patch for now, until issues are resolved.\n\nRegards.","headers":{"Return-Path":"","X-Original-To":"patchwork-incoming@ozlabs.org","Delivered-To":"patchwork-incoming@ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=netdev-owner@vger.kernel.org;\n\treceiver=)","ozlabs.org; dkim=pass (1024-bit key;\n\tunprotected) header.d=Mellanox.com header.i=@Mellanox.com\n\theader.b=\"M2sCRktz\"; dkim-atps=neutral","spf=none (sender IP is )\n\tsmtp.mailfrom=tariqt@mellanox.com; "],"Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3y1lDc01ssz9sBd\n\tfor ;\n\tWed, 27 Sep 2017 01:26:56 +1000 (AEST)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1031351AbdIZP0x (ORCPT );\n\tTue, 26 Sep 2017 11:26:53 -0400","from mail-eopbgr20089.outbound.protection.outlook.com\n\t([40.107.2.89]:39397\n\t\"EHLO EUR02-VE1-obe.outbound.protection.outlook.com\"\n\trhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP\n\tid S934460AbdIZP0v (ORCPT );\n\tTue, 26 Sep 2017 11:26:51 -0400","from [10.8.2.253] (193.47.165.251) by\n\tDB5PR05MB1799.eurprd05.prod.outlook.com (2a01:111:e400:5bc5::13) with\n\tMicrosoft SMTP Server (version=TLS1_2,\n\tcipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256) id 15.20.77.7;\n\tTue, 26 Sep 2017 15:26:46 +0000"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed; d=Mellanox.com;\n\ts=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version;\n\tbh=ZE9JIcoiFY4SMwBqLI8zNaemA1zAPyhW/3djMS8dc7A=;\n\tb=M2sCRktz3M4i1Mxl4asrQfRbeETNSuxqqJvM+DEtdU8KOo14+g4VE6TGXr8a+4MUE5hj31sFlnlY3KczCqi1mmpiaQ74jYzcEboW2SncGQNA7kbXRmc5TStHv6MXe86I0N4UtQOGTVO9b66Y1MBTfr2znyGhOv/me5MEz9lN2S8=","Subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","To":"Eric Dumazet ","Cc":"Dmitry Torokhov ,\n\t\"David S . Miller\" ,\n\tnetdev ,\n\t\"Eric W . Biederman\" ,\n\tEric Dumazet , Majd Dibbiny ,\n\tYonatan Cohen ,\n\tEran Ben Elisha ","References":"<20170919232709.14690-1-edumazet@google.com>\n\t<8edb310a-562d-bff1-0482-64314833e722@mellanox.com>\n\t\n\t<266d30e7-5164-48e8-b802-56bb93558823@mellanox.com>\n\t","From":"Tariq Toukan ","Message-ID":"","Date":"Tue, 26 Sep 2017 18:26:41 +0300","User-Agent":"Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101\n\tThunderbird/52.3.0","MIME-Version":"1.0","In-Reply-To":"","Content-Type":"text/plain; charset=utf-8; format=flowed","Content-Transfer-Encoding":"7bit","Content-Language":"en-US","X-Originating-IP":"[193.47.165.251]","X-ClientProxiedBy":"HE1PR0402CA0026.eurprd04.prod.outlook.com\n\t(2603:10a6:7:7c::15) To DB5PR05MB1799.eurprd05.prod.outlook.com\n\t(2a01:111:e400:5bc5::13)","X-MS-PublicTrafficType":"Email","X-MS-Office365-Filtering-Correlation-Id":"5319e378-5595-48c7-b38e-08d504f300c4","X-MS-Office365-Filtering-HT":"Tenant","X-Microsoft-Antispam":"UriScan:; BCL:0; PCL:0;\n\tRULEID:(22001)(2017030254152)(48565401081)(2017052603199)(201703131423075)(201703031133081)(201702281549075);\n\tSRVR:DB5PR05MB1799; 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Miller\" ,\n\tnetdev ,\n\t\"Eric W . Biederman\" ,\n\tEric Dumazet , Majd Dibbiny ,\n\tYonatan Cohen ,\n\tEran Ben Elisha ","Content-Type":"text/plain; charset=\"UTF-8\"","Sender":"netdev-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"netdev@vger.kernel.org"}},{"id":1790456,"web_url":"http://patchwork.ozlabs.org/comment/1790456/","msgid":"","list_archive_url":null,"date":"2017-10-19T11:48:37","subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","submitter":{"id":68926,"url":"http://patchwork.ozlabs.org/api/people/68926/","name":"Tariq Toukan","email":"tariqt@mellanox.com"},"content":"On 26/09/2017 6:30 PM, Eric Dumazet wrote:\n> On Tue, Sep 26, 2017 at 8:22 AM, Dmitry Torokhov\n> wrote:\n> \n>> It is in Greg's tree where all kobject patches should go through as far as I know.\n> \n> Yes, I will fix this, adding a second memmove()\n> \nHi Eric,\n\nI just wanted to check if this is solved already, as I don't want to \nkeep an unnecessary revert patch in our internal branches.\nAccording to my check bug still exists.\n\nThanks,\nTariq","headers":{"Return-Path":"","X-Original-To":"patchwork-incoming@ozlabs.org","Delivered-To":"patchwork-incoming@ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=netdev-owner@vger.kernel.org;\n\treceiver=)","ozlabs.org; dkim=pass (1024-bit key;\n\tunprotected) header.d=Mellanox.com header.i=@Mellanox.com\n\theader.b=\"t9NWFtmX\"; dkim-atps=neutral","spf=none (sender IP is )\n\tsmtp.mailfrom=tariqt@mellanox.com; "],"Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3yHnJr0bTNz9t2Z\n\tfor ;\n\tThu, 19 Oct 2017 22:49:15 +1100 (AEDT)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1752742AbdJSLtN (ORCPT );\n\tThu, 19 Oct 2017 07:49:13 -0400","from mail-ve1eur01on0071.outbound.protection.outlook.com\n\t([104.47.1.71]:35616\n\t\"EHLO EUR01-VE1-obe.outbound.protection.outlook.com\"\n\trhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP\n\tid S1751680AbdJSLtL (ORCPT );\n\tThu, 19 Oct 2017 07:49:11 -0400","from [10.8.2.253] (193.47.165.251) by\n\tDB5PR05MB1799.eurprd05.prod.outlook.com (2a01:111:e400:5bc5::13) with\n\tMicrosoft SMTP Server (version=TLS1_2,\n\tcipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P256) id 15.20.77.7;\n\tThu, 19 Oct 2017 11:49:06 +0000"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed; d=Mellanox.com;\n\ts=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version;\n\tbh=aPH5avddp8p2xnFJrGF/9rCnuWtmOlI8RpmjSpoDTgE=;\n\tb=t9NWFtmXc3yYrtR4LsZf+7NTSOj/y6vSV07+NgfLV/AkJoMftIkeZyzqR8N7f2pYiVdpbqir3iujWOmqqvtW7+TN/VW6S6COH+b42YZ7mnif6lFCXhO/49MUVuE38JsGmYb91vqKNukfGKebGH8Oa5Ih+7MMkOHb17vVvszrxxU=","Subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","To":"Eric Dumazet ,\n\tDmitry Torokhov ","Cc":"Tariq Toukan ,\n\t\"David S . Miller\" ,\n\tnetdev ,\n\t\"Eric W . Biederman\" ,\n\tEric Dumazet , Majd Dibbiny ,\n\tYonatan Cohen ,\n\tEran Ben Elisha ","References":"<20170919232709.14690-1-edumazet@google.com>\n\t<8edb310a-562d-bff1-0482-64314833e722@mellanox.com>\n\t\n\t<266d30e7-5164-48e8-b802-56bb93558823@mellanox.com>\n\t\n\t<33E69A03-6594-423A-86E6-02029046BE7D@gmail.com>\n\t","From":"Tariq Toukan ","Message-ID":"","Date":"Thu, 19 Oct 2017 14:48:37 +0300","User-Agent":"Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101\n\tThunderbird/52.4.0","MIME-Version":"1.0","In-Reply-To":"","Content-Type":"text/plain; charset=utf-8; format=flowed","Content-Language":"en-US","Content-Transfer-Encoding":"7bit","X-Originating-IP":"[193.47.165.251]","X-ClientProxiedBy":"AM5PR0102CA0017.eurprd01.prod.exchangelabs.com\n\t(2603:10a6:206::30) To DB5PR05MB1799.eurprd05.prod.outlook.com\n\t(2a01:111:e400:5bc5::13)","X-MS-PublicTrafficType":"Email","X-MS-Office365-Filtering-Correlation-Id":"8dc65096-7eba-4b00-e880-08d516e7681f","X-MS-Office365-Filtering-HT":"Tenant","X-Microsoft-Antispam":"UriScan:; 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SFP:1101; SCL:1; SRVR:DB5PR05MB1799; H:[10.8.2.253];\n\tFPR:; SPF:None; PTR:InfoNoRecords; A:1; MX:1; LANG:en; ","Received-SPF":"None (protection.outlook.com: mellanox.com does not designate\n\tpermitted sender hosts)","SpamDiagnosticOutput":"1:99","SpamDiagnosticMetadata":"NSPM","X-OriginatorOrg":"Mellanox.com","X-MS-Exchange-CrossTenant-OriginalArrivalTime":"19 Oct 2017 11:49:06.9845\n\t(UTC)","X-MS-Exchange-CrossTenant-FromEntityHeader":"Hosted","X-MS-Exchange-CrossTenant-Id":"a652971c-7d2e-4d9b-a6a4-d149256f461b","X-MS-Exchange-Transport-CrossTenantHeadersStamped":"DB5PR05MB1799","Sender":"netdev-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"netdev@vger.kernel.org"}},{"id":1790603,"web_url":"http://patchwork.ozlabs.org/comment/1790603/","msgid":"","list_archive_url":null,"date":"2017-10-19T14:11:03","subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","submitter":{"id":13357,"url":"http://patchwork.ozlabs.org/api/people/13357/","name":"Eric Dumazet","email":"edumazet@google.com"},"content":"On Thu, Oct 19, 2017 at 4:48 AM, Tariq Toukan wrote:\n>\n> Hi Eric,\n>\n> I just wanted to check if this is solved already, as I don't want to keep an\n> unnecessary revert patch in our internal branches.\n> According to my check bug still exists.\n>\nI will handle this today, thanks for the reminder.","headers":{"Return-Path":"","X-Original-To":"patchwork-incoming@ozlabs.org","Delivered-To":"patchwork-incoming@ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; 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\n\tThu, 19 Oct 2017 07:11:04 -0700 (PDT)","MIME-Version":"1.0","In-Reply-To":"","References":"<20170919232709.14690-1-edumazet@google.com>\n\t<8edb310a-562d-bff1-0482-64314833e722@mellanox.com>\n\t\n\t<266d30e7-5164-48e8-b802-56bb93558823@mellanox.com>\n\t\n\t<33E69A03-6594-423A-86E6-02029046BE7D@gmail.com>\n\t\n\t","From":"Eric Dumazet ","Date":"Thu, 19 Oct 2017 07:11:03 -0700","Message-ID":"","Subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","To":"Tariq Toukan ","Cc":"Dmitry Torokhov ,\n\t\"David S . Miller\" ,\n\tnetdev ,\n\t\"Eric W . Biederman\" ,\n\tEric Dumazet , Majd Dibbiny ,\n\tYonatan Cohen ,\n\tEran Ben Elisha ","Content-Type":"text/plain; charset=\"UTF-8\"","Sender":"netdev-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"netdev@vger.kernel.org"}},{"id":1821873,"web_url":"http://patchwork.ozlabs.org/comment/1821873/","msgid":"","list_archive_url":null,"date":"2017-12-13T21:43:21","subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","submitter":{"id":695,"url":"http://patchwork.ozlabs.org/api/people/695/","name":"Dmitry Torokhov","email":"dmitry.torokhov@gmail.com"},"content":"Hi Eric,\n\nOn Thu, Oct 19, 2017 at 7:11 AM, Eric Dumazet wrote:\n>\n> On Thu, Oct 19, 2017 at 4:48 AM, Tariq Toukan wrote:\n> >\n> > Hi Eric,\n> >\n> > I just wanted to check if this is solved already, as I don't want to keep an\n> > unnecessary revert patch in our internal branches.\n> > According to my check bug still exists.\n> >\n> I will handle this today, thanks for the reminder.\n\nDid you have a chance to do this? It looks like the original change\nlanded on mainline and causes modules to be autoloaded on KOBJ_UNBIND\nagain.\n\nThanks!","headers":{"Return-Path":"","X-Original-To":"patchwork-incoming@ozlabs.org","Delivered-To":"patchwork-incoming@ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=netdev-owner@vger.kernel.org;\n\treceiver=)","ozlabs.org; dkim=pass (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"F1GFcKGB\"; dkim-atps=neutral"],"Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3yxqv40G16z9s4q\n\tfor ;\n\tThu, 14 Dec 2017 08:43:28 +1100 (AEDT)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1753823AbdLMVnZ (ORCPT );\n\tWed, 13 Dec 2017 16:43:25 -0500","from mail-ua0-f196.google.com ([209.85.217.196]:40102 \"EHLO\n\tmail-ua0-f196.google.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1753463AbdLMVnX (ORCPT\n\t); Wed, 13 Dec 2017 16:43:23 -0500","by mail-ua0-f196.google.com with SMTP id i92so2598894uad.7\n\tfor ; Wed, 13 Dec 2017 13:43:22 -0800 (PST)","by 10.176.28.10 with HTTP; Wed, 13 Dec 2017 13:43:21 -0800 (PST)"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=gmail.com; s=20161025;\n\th=mime-version:in-reply-to:references:from:date:message-id:subject:to\n\t:cc; bh=4TMYYRyMnzj+efw2LepTTx30mKKrwAmOgJ3btp0FPkk=;\n\tb=F1GFcKGBGqxZYDo15pGNtRv7yMRiUbk/rcP9SfGOnMfSwNfSzWLXIXYdVZHgDlMYs8\n\tzLCx2L8vp5n8p7lnidh9hhiR5YVWLFuyqz9KUGy87j9N+PEnWVZnR9IRqOKw1GnGKcxn\n\tXl/JRQouGFi5o/X1lRECFGs0OwPN7ebAfzsSMUOQdc8ifMuZrFHYPcDvcyG4mOaINmGI\n\ti370fFDohMznLGo1W+BzKh6XVh/W/DleMygAEo35qKiFnGHTp3kV5Xy71J43F5+0HESF\n\tiTjxLrke9axlslwFDhgNzD+xKdLRcsTU0/tYgvKfU5PvhTbVVrm4Fx+Lte+sJNwDqv7d\n\tYcHA==","X-Google-DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=1e100.net; s=20161025;\n\th=x-gm-message-state:mime-version:in-reply-to:references:from:date\n\t:message-id:subject:to:cc;\n\tbh=4TMYYRyMnzj+efw2LepTTx30mKKrwAmOgJ3btp0FPkk=;\n\tb=uhARl/XpQpzWmCwew5mTHQCkMEaSTJkiAP3ykYJmCemWWXWe3gNCVMrv0MV5C5pAQl\n\tmbExR5P5pJWQVB/3bnnvqzigBy+Yt+VYhj6NVugV5S2i1l/jxzG8vNl5zK1IQl5r/gFE\n\tg04v8/Lk7tsz1nsZFZM6ppHGug0BQEuH5tiURCPvb8K3E/dIoSKLjEHa42TqDngBevvA\n\tKGOnoZ6SyXhLdZJThLZfOnBjQmaatZ766yrgCpn/+kyNExkj8Lyu2bCYZAhkuX8G6ntx\n\tkrI1jMoQ7RozvFxaQjJu+P55oEur5Rsc8RDfQJG0wkjU+ni09FGV1GFL1cOwQNTamvNh\n\txCUQ==","X-Gm-Message-State":"AKGB3mLSSuNHKU5ZH9V7GcWUt6uDN10EfKLRvIPtfZyuozL1kVigOYPd\n\tQqj5y6N44lpGM+fVQBM72UNfjCT0HQWpqCik91Q=","X-Google-Smtp-Source":"ACJfBotHyrSJ6QijNr8Gk8wSkHBTOYVAuyKXybS/SjwhDorbt/X+2Kp+wWcknrOXANxJvWLfv72Q73hT6Qvn1VC7kmE=","X-Received":"by 10.176.73.105 with SMTP id a38mr2994334uad.150.1513201401913; \n\tWed, 13 Dec 2017 13:43:21 -0800 (PST)","MIME-Version":"1.0","In-Reply-To":"","References":"<20170919232709.14690-1-edumazet@google.com>\n\t<8edb310a-562d-bff1-0482-64314833e722@mellanox.com>\n\t\n\t<266d30e7-5164-48e8-b802-56bb93558823@mellanox.com>\n\t\n\t<33E69A03-6594-423A-86E6-02029046BE7D@gmail.com>\n\t\n\t\n\t","From":"Dmitry Torokhov ","Date":"Wed, 13 Dec 2017 13:43:21 -0800","Message-ID":"","Subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","To":"Eric Dumazet ","Cc":"Tariq Toukan ,\n\t\"David S . Miller\" ,\n\tnetdev ,\n\t\"Eric W . Biederman\" ,\n\tEric Dumazet , Majd Dibbiny ,\n\tYonatan Cohen ,\n\tEran Ben Elisha ","Content-Type":"text/plain; charset=\"UTF-8\"","Sender":"netdev-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"netdev@vger.kernel.org"}},{"id":1821880,"web_url":"http://patchwork.ozlabs.org/comment/1821880/","msgid":"<1513201949.25033.68.camel@gmail.com>","list_archive_url":null,"date":"2017-12-13T21:52:29","subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","submitter":{"id":2404,"url":"http://patchwork.ozlabs.org/api/people/2404/","name":"Eric Dumazet","email":"eric.dumazet@gmail.com"},"content":"On Wed, 2017-12-13 at 13:43 -0800, Dmitry Torokhov wrote:\n> Hi Eric,\n> \n> On Thu, Oct 19, 2017 at 7:11 AM, Eric Dumazet wrote:\n> > \n> > On Thu, Oct 19, 2017 at 4:48 AM, Tariq Toukan wrote:\n> > > \n> > > Hi Eric,\n> > > \n> > > I just wanted to check if this is solved already, as I don't want to keep an\n> > > unnecessary revert patch in our internal branches.\n> > > According to my check bug still exists.\n> > > \n> > \n> > I will handle this today, thanks for the reminder.\n> \n> Did you have a chance to do this? It looks like the original change\n> landed on mainline and causes modules to be autoloaded on KOBJ_UNBIND\n> again.\n> \n> Thanks!\n\nI sent the following to Tariq, and he tested it successfully.\n\nI will submit this formally.\n\ndiff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c\nindex c3e84edc47c965d40199b652ba78876cdaa9c70c..0795482b15d5a8f1b65b570a071aa1419cb923d8 100644\n--- a/lib/kobject_uevent.c\n+++ b/lib/kobject_uevent.c\n@@ -346,19 +346,25 @@ static int kobject_uevent_net_broadcast(struct kobject *kobj,\n static void zap_modalias_env(struct kobj_uevent_env *env)\n {\n \tstatic const char modalias_prefix[] = \"MODALIAS=\";\n+\tsize_t offset = 0, len;\n \tint i;\n \n \tfor (i = 0; i < env->envp_idx;) {\n+\t\tlen = strlen(env->envp[i]) + 1;\n \t\tif (strncmp(env->envp[i], modalias_prefix,\n \t\t\t sizeof(modalias_prefix) - 1)) {\n \t\t\ti++;\n+\t\t\toffset += len;\n \t\t\tcontinue;\n \t\t}\n \n-\t\tif (i != env->envp_idx - 1)\n+\t\tenv->buflen -= len;\n+\t\tif (i != env->envp_idx - 1) {\n+\t\t\tmemmove(env->envp[i], env->envp[i + 1],\n+\t\t\t\tenv->buflen - offset);\n \t\t\tmemmove(&env->envp[i], &env->envp[i + 1],\n \t\t\t\tsizeof(env->envp[i]) * env->envp_idx - 1);\n-\n+\t\t}\n \t\tenv->envp_idx--;\n \t}\n }","headers":{"Return-Path":"","X-Original-To":"patchwork-incoming@ozlabs.org","Delivered-To":"patchwork-incoming@ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=netdev-owner@vger.kernel.org;\n\treceiver=)","ozlabs.org; dkim=pass (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"S6u/yNqJ\"; dkim-atps=neutral"],"Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3yxr5d6gzcz9s7B\n\tfor ;\n\tThu, 14 Dec 2017 08:52:37 +1100 (AEDT)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1753977AbdLMVwg (ORCPT );\n\tWed, 13 Dec 2017 16:52:36 -0500","from mail-pf0-f193.google.com ([209.85.192.193]:46494 \"EHLO\n\tmail-pf0-f193.google.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1753737AbdLMVwc (ORCPT\n\t); Wed, 13 Dec 2017 16:52:32 -0500","by mail-pf0-f193.google.com with SMTP id c204so2081759pfc.13\n\tfor ; Wed, 13 Dec 2017 13:52:32 -0800 (PST)","from edumazet-glaptop3.lan (c-67-180-167-114.hsd1.ca.comcast.net.\n\t[67.180.167.114]) by smtp.googlemail.com with ESMTPSA id\n\tp13sm4452587pgn.32.2017.12.13.13.52.30\n\t(version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256);\n\tWed, 13 Dec 2017 13:52:30 -0800 (PST)"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=gmail.com; s=20161025;\n\th=message-id:subject:from:to:cc:date:in-reply-to:references\n\t:mime-version:content-transfer-encoding;\n\tbh=NSB3EQORi7QK84U+Yix0TlTAeAsqsEoglijlbnMox+4=;\n\tb=S6u/yNqJqKeyR8sCcK2kIlHpDImq+gfqXGnokkPLPMMFpbzePE6v4FOJxlIt8TnhA6\n\ttc1GEE0rdXfcgEMyf8BNscaD/CT6+uTyqIi4jCYJVZKctY8UMD2Wmpq/nhw/BoNAT0/q\n\t2UNCa3SIeTcpwk5jMZyunNeyzwSAUqyntzGjTwC3OaVk9Cw01uHBynNr9ZuJDLP2YmAl\n\t5TWQ0FCBf4ev2pKVXW8VJlagFT3EfJZGXQW/UHpjavPqloqNIVP4Lj8uNX+PnPJ9Ky9r\n\tfgeQmIgB9f5+UeLhKTEtxXQ5NIs+VrR41bofh7BjjnOQpgL2jKSXB/E4OCNypEMIcgOQ\n\tIzsQ==","X-Google-DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=1e100.net; s=20161025;\n\th=x-gm-message-state:message-id:subject:from:to:cc:date:in-reply-to\n\t:references:mime-version:content-transfer-encoding;\n\tbh=NSB3EQORi7QK84U+Yix0TlTAeAsqsEoglijlbnMox+4=;\n\tb=b6BltFrNbTvNqkWfWBOBflAenhmbECwoYS7by889OcJU2xS2J74C3Sgyo65W+dfADh\n\togYynSIRU8QKkaaFg3jzDvr3eJYGzSxALMiTvDcxJzryDjLfmSllzJJcAeGD0CeLAHMS\n\tt7BspQEYP62OB1JteWYokh2wTKcTobjbzBg+WjPKHErnbHgbpIerZp8USiyKiUJ/axTC\n\txSTaz2jbEJWYZBtzExBeQe8fG+8/e6tLNkPF4aFw/0mfOpVIMGy8ss9cJULaDtLMQeqY\n\tvh67yMNtt+MoccSy6OFDOm5HzDDdnRzGGqSKs6M5IX+JdyzD7igO0x1Qic9Xj3wj4PQE\n\tg0iw==","X-Gm-Message-State":"AKGB3mLU1FoRCtC7ylXmO3CWVKPEtwqi8FlHyQXPHoxZcVueRO96sxgC\n\trFoGkCcLsdaB8u+7oOBCoYU=","X-Google-Smtp-Source":"ACJfBouMbMq4GwaCO+8yxfyUCr+FNPWy7q5EwUr9GPXfJyCgJZscBsM+sF0dqarwu3oueBKEmRHpug==","X-Received":"by 10.84.228.200 with SMTP id y8mr7161945pli.202.1513201951665; \n\tWed, 13 Dec 2017 13:52:31 -0800 (PST)","Message-ID":"<1513201949.25033.68.camel@gmail.com>","Subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","From":"Eric Dumazet ","To":"Dmitry Torokhov ,\n\tEric Dumazet ","Cc":"Tariq Toukan ,\n\t\"David S . Miller\" ,\n\tnetdev ,\n\t\"Eric W . Biederman\" ,\n\tMajd Dibbiny , Yonatan Cohen ,\n\tEran Ben Elisha ","Date":"Wed, 13 Dec 2017 13:52:29 -0800","In-Reply-To":"","References":"<20170919232709.14690-1-edumazet@google.com>\n\t<8edb310a-562d-bff1-0482-64314833e722@mellanox.com>\n\t\n\t<266d30e7-5164-48e8-b802-56bb93558823@mellanox.com>\n\t\n\t<33E69A03-6594-423A-86E6-02029046BE7D@gmail.com>\n\t\n\t\n\t\n\t","Content-Type":"text/plain; charset=\"UTF-8\"","X-Mailer":"Evolution 3.22.6-1+deb9u1 ","Mime-Version":"1.0","Content-Transfer-Encoding":"7bit","Sender":"netdev-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"netdev@vger.kernel.org"}},{"id":1821886,"web_url":"http://patchwork.ozlabs.org/comment/1821886/","msgid":"","list_archive_url":null,"date":"2017-12-13T22:24:49","subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","submitter":{"id":695,"url":"http://patchwork.ozlabs.org/api/people/695/","name":"Dmitry Torokhov","email":"dmitry.torokhov@gmail.com"},"content":"On Wed, Dec 13, 2017 at 1:52 PM, Eric Dumazet wrote:\n> On Wed, 2017-12-13 at 13:43 -0800, Dmitry Torokhov wrote:\n>> Hi Eric,\n>>\n>> On Thu, Oct 19, 2017 at 7:11 AM, Eric Dumazet wrote:\n>> >\n>> > On Thu, Oct 19, 2017 at 4:48 AM, Tariq Toukan wrote:\n>> > >\n>> > > Hi Eric,\n>> > >\n>> > > I just wanted to check if this is solved already, as I don't want to keep an\n>> > > unnecessary revert patch in our internal branches.\n>> > > According to my check bug still exists.\n>> > >\n>> >\n>> > I will handle this today, thanks for the reminder.\n>>\n>> Did you have a chance to do this? It looks like the original change\n>> landed on mainline and causes modules to be autoloaded on KOBJ_UNBIND\n>> again.\n>>\n>> Thanks!\n>\n> I sent the following to Tariq, and he tested it successfully.\n>\n> I will submit this formally.\n>\n> diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c\n> index c3e84edc47c965d40199b652ba78876cdaa9c70c..0795482b15d5a8f1b65b570a071aa1419cb923d8 100644\n> --- a/lib/kobject_uevent.c\n> +++ b/lib/kobject_uevent.c\n> @@ -346,19 +346,25 @@ static int kobject_uevent_net_broadcast(struct kobject *kobj,\n> static void zap_modalias_env(struct kobj_uevent_env *env)\n> {\n> static const char modalias_prefix[] = \"MODALIAS=\";\n> + size_t offset = 0, len;\n> int i;\n>\n> for (i = 0; i < env->envp_idx;) {\n> + len = strlen(env->envp[i]) + 1;\n> if (strncmp(env->envp[i], modalias_prefix,\n> sizeof(modalias_prefix) - 1)) {\n> i++;\n> + offset += len;\n> continue;\n> }\n>\n> - if (i != env->envp_idx - 1)\n> + env->buflen -= len;\n> + if (i != env->envp_idx - 1) {\n> + memmove(env->envp[i], env->envp[i + 1],\n> + env->buflen - offset);\n> memmove(&env->envp[i], &env->envp[i + 1],\n> sizeof(env->envp[i]) * env->envp_idx - 1);\n> -\n> + }\n> env->envp_idx--;\n> }\n> }\n>\n\nAs I mentioned in the other thread, that works for netlink, but breaks\nif you actually using env->envp pointers, as they also need to be\nadjusted. I have a patch that fixes it properly.\n\nThanks!","headers":{"Return-Path":"","X-Original-To":"patchwork-incoming@ozlabs.org","Delivered-To":"patchwork-incoming@ozlabs.org","Authentication-Results":["ozlabs.org;\n\tspf=none (mailfrom) smtp.mailfrom=vger.kernel.org\n\t(client-ip=209.132.180.67; helo=vger.kernel.org;\n\tenvelope-from=netdev-owner@vger.kernel.org;\n\treceiver=)","ozlabs.org; dkim=pass (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"LNzKir7J\"; dkim-atps=neutral"],"Received":["from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3yxrpt6NbFz9sCZ\n\tfor ;\n\tThu, 14 Dec 2017 09:24:54 +1100 (AEDT)","(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1751952AbdLMWYw (ORCPT );\n\tWed, 13 Dec 2017 17:24:52 -0500","from mail-vk0-f67.google.com ([209.85.213.67]:43863 \"EHLO\n\tmail-vk0-f67.google.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1751088AbdLMWYv (ORCPT\n\t); Wed, 13 Dec 2017 17:24:51 -0500","by mail-vk0-f67.google.com with SMTP id u84so2407543vke.10\n\tfor ; Wed, 13 Dec 2017 14:24:50 -0800 (PST)","by 10.176.28.10 with HTTP; Wed, 13 Dec 2017 14:24:49 -0800 (PST)"],"DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=gmail.com; s=20161025;\n\th=mime-version:in-reply-to:references:from:date:message-id:subject:to\n\t:cc; bh=5b9wwuQi3a4OLi8d354yV/NZdgw4Z2MFWDW9aIWYccI=;\n\tb=LNzKir7JYYFvH+LGvqJTGawdB/AlqcI11aT6DQLgYZuAR0lG9023r7phwtlZnwZ8aj\n\tTacclrk2cwP31RftRn/TehMUBecAd2tHxKBWypN1mznRh38aRUxvsPpfloqROFeAnMsf\n\t6OEs157ZwqW9VucL1afAgLQ4k5bzwpgLKwoPPxAZEASn/1bGMEhVsqubGty34eS5J2QQ\n\tZgV1MUvrWw+CyoG7VSUE5kE6U46smxfX5aJ8VqgTfI9aFKPit3Hv1Del4s1B+Rk5sY9+\n\t6y35RizS5l3LansPbkc32p/IDLOhbKWv2Do37w3MhC6vWdQnCyS2Q+VmKz+9GUEOIIZv\n\tgO/A==","X-Google-DKIM-Signature":"v=1; a=rsa-sha256; c=relaxed/relaxed;\n\td=1e100.net; s=20161025;\n\th=x-gm-message-state:mime-version:in-reply-to:references:from:date\n\t:message-id:subject:to:cc;\n\tbh=5b9wwuQi3a4OLi8d354yV/NZdgw4Z2MFWDW9aIWYccI=;\n\tb=shpeuzp8eAaqOa/o9vgP6Br2/Q5MTun8dFuC5R4Qg9mjPfrImfq9oao/LUt8CydJll\n\t2fQQzqrqzFKfgZM1/lg8yJosg1laT52j1RzPLEJV+QUF3UZwjIbtmiV0YCoiioj5PAuw\n\t6HjERG/Q8CU7U1KeVGSg5YC2MzHqFp9o6tJuZbQf1L4p/Ff37SVcvgTvmubzHZTlC5PZ\n\t8UVYCxqu7MFzUh4PxCwQFDINK61/5YEYmCB7c+/6BKg79nBNA3MuakJIPDgDANdKrquJ\n\t/IKEAiMIN+o/rK/19OJ96MUogCZguoYN29NqaUwE+mfdFH400QuarkkX459Jz/5FPlr1\n\t2NBA==","X-Gm-Message-State":"AKGB3mJu4uj5gMhBrdo5W+3E+KGc5TG3c9hmxUbegIcE+ujOE3DErW4B\n\teZKq0cjyr0Xr9kC/etDKeNvYG6DUcw+aJeExtcBkzA==","X-Google-Smtp-Source":"ACJfBosbna1yx7qEAvJc23AZ4wWwv+5+OwIjA+x8rDs3GmOpYvWu1SplF/fpJQfiva0AnWdvP+m6WDtBPVo9K91XDfI=","X-Received":"by 10.31.138.2 with SMTP id m2mr90622vkd.60.1513203890010;\n\tWed, 13 Dec 2017 14:24:50 -0800 (PST)","MIME-Version":"1.0","In-Reply-To":"<1513201949.25033.68.camel@gmail.com>","References":"<20170919232709.14690-1-edumazet@google.com>\n\t<8edb310a-562d-bff1-0482-64314833e722@mellanox.com>\n\t\n\t<266d30e7-5164-48e8-b802-56bb93558823@mellanox.com>\n\t\n\t<33E69A03-6594-423A-86E6-02029046BE7D@gmail.com>\n\t\n\t\n\t\n\t\n\t<1513201949.25033.68.camel@gmail.com>","From":"Dmitry Torokhov ","Date":"Wed, 13 Dec 2017 14:24:49 -0800","Message-ID":"","Subject":"Re: [PATCH v2 net-next 0/7] net: speedup netns create/delete time","To":"Eric Dumazet ","Cc":"Eric Dumazet , Tariq Toukan ,\n\t\"David S . Miller\" ,\n\tnetdev ,\n\t\"Eric W . Biederman\" ,\n\tMajd Dibbiny , Yonatan Cohen ,\n\tEran Ben Elisha ","Content-Type":"text/plain; charset=\"UTF-8\"","Sender":"netdev-owner@vger.kernel.org","Precedence":"bulk","List-ID":"","X-Mailing-List":"netdev@vger.kernel.org"}}]