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GET /api/1.2/patches/832942/?format=api
{ "id": 832942, "url": "http://patchwork.ozlabs.org/api/1.2/patches/832942/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netdev/patch/150954313588.153848.10192893966808917578.stgit@buzz/", "project": { "id": 7, "url": "http://patchwork.ozlabs.org/api/1.2/projects/7/?format=api", "name": "Linux network development", "link_name": "netdev", "list_id": "netdev.vger.kernel.org", "list_email": "netdev@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<150954313588.153848.10192893966808917578.stgit@buzz>", "list_archive_url": null, "date": "2017-11-01T13:32:15", "name": "tcp_nv: fix division by zero in tcpnv_acked()", "commit_ref": null, "pull_url": null, "state": "accepted", "archived": true, "hash": "c16a6335844cc2f2ff4872e6eca1e6d3e754aa58", "submitter": { "id": 65606, "url": "http://patchwork.ozlabs.org/api/1.2/people/65606/?format=api", "name": "Konstantin Khlebnikov", "email": "khlebnikov@yandex-team.ru" }, "delegate": { "id": 34, "url": "http://patchwork.ozlabs.org/api/1.2/users/34/?format=api", "username": "davem", "first_name": "David", "last_name": "Miller", "email": "davem@davemloft.net" }, "mbox": "http://patchwork.ozlabs.org/project/netdev/patch/150954313588.153848.10192893966808917578.stgit@buzz/mbox/", "series": [ { "id": 11326, "url": "http://patchwork.ozlabs.org/api/1.2/series/11326/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netdev/list/?series=11326", "date": "2017-11-01T13:32:15", "name": "tcp_nv: fix division by zero in tcpnv_acked()", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/11326/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/832942/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/832942/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<netdev-owner@vger.kernel.org>", "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=<UNKNOWN>)", "ozlabs.org; dkim=pass (1024-bit key;\n\tunprotected) header.d=yandex-team.ru header.i=@yandex-team.ru\n\theader.b=\"dk/S909q\"; dkim-atps=neutral", "smtpcorp1p.mail.yandex.net;\n\tdkim=pass header.i=@yandex-team.ru" ], "Received": [ "from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3yRq014XjZz9sRn\n\tfor <patchwork-incoming@ozlabs.org>;\n\tThu, 2 Nov 2017 00:32:33 +1100 (AEDT)", "(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1754547AbdKANcW (ORCPT <rfc822;patchwork-incoming@ozlabs.org>);\n\tWed, 1 Nov 2017 09:32:22 -0400", "from forwardcorp1j.cmail.yandex.net ([5.255.227.106]:37915 \"EHLO\n\tforwardcorp1j.cmail.yandex.net\" rhost-flags-OK-OK-OK-OK)\n\tby vger.kernel.org with ESMTP id S1752019AbdKANcV (ORCPT\n\t<rfc822;netdev@vger.kernel.org>); Wed, 1 Nov 2017 09:32:21 -0400", "from smtpcorp1p.mail.yandex.net (smtpcorp1p.mail.yandex.net\n\t[IPv6:2a02:6b8:0:1472:2741:0:8b6:10])\n\tby forwardcorp1j.cmail.yandex.net (Yandex) with ESMTP id 3408A20D15; \n\tWed, 1 Nov 2017 16:32:19 +0300 (MSK)", "from smtpcorp1p.mail.yandex.net (localhost.localdomain [127.0.0.1])\n\tby smtpcorp1p.mail.yandex.net (Yandex) with ESMTP id 30D276E40DB2;\n\tWed, 1 Nov 2017 16:32:19 +0300 (MSK)", "from unknown (unknown [2a02:6b8:0:460:c5ab:eccf:e6e6:3148])\n\tby smtpcorp1p.mail.yandex.net (nwsmtp/Yandex) with ESMTPSA id\n\tAxtHTNLD6Q-WJECFLbD; Wed, 01 Nov 2017 16:32:19 +0300\n\t(using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128\n\tbits)) (Client certificate not present)" ], "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex-team.ru;\n\ts=default; \n\tt=1509543139; bh=87lt1oKUo8JP6AvwovZ0zi+3PVdDmJbia3jO4sW4TGo=;\n\th=Subject:From:To:Cc:Date:Message-ID;\n\tb=dk/S909qz9E981TbUdwf5chZNpeOoBlgbNh+vQvDbgENOQ/xEjpcis1fwBzfpVnuB\n\tUo06GFuPBThCIGLW25p5FOlqB3MAIcBNKrgHkyEasIu4pUx9hgogWmk6/A6UK7wshM\n\t6xingYxDrKPXKRq1Gno82u6QkMtOidQ9ZE4I2XHg=", "Subject": "[PATCH] tcp_nv: fix division by zero in tcpnv_acked()", "From": "Konstantin Khlebnikov <khlebnikov@yandex-team.ru>", "To": "netdev@vger.kernel.org, \"David S. Miller\" <davem@davemloft.net>", "Cc": "Lawrence Brakmo <brakmo@fb.com>, Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,\n\tHideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>, linux-kernel@vger.kernel.org", "Date": "Wed, 01 Nov 2017 16:32:15 +0300", "Message-ID": "<150954313588.153848.10192893966808917578.stgit@buzz>", "User-Agent": "StGit/0.17.1-dirty", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=\"utf-8\"", "Content-Transfer-Encoding": "7bit", "Sender": "netdev-owner@vger.kernel.org", "Precedence": "bulk", "List-ID": "<netdev.vger.kernel.org>", "X-Mailing-List": "netdev@vger.kernel.org" }, "content": "Average RTT could become zero. This happened in real life at least twice.\nThis patch treats zero as 1us.\n\nSigned-off-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>\n---\n net/ipv4/tcp_nv.c | 2 +-\n 1 file changed, 1 insertion(+), 1 deletion(-)", "diff": "diff --git a/net/ipv4/tcp_nv.c b/net/ipv4/tcp_nv.c\nindex 1ff73982e28c..125fc1450b01 100644\n--- a/net/ipv4/tcp_nv.c\n+++ b/net/ipv4/tcp_nv.c\n@@ -252,7 +252,7 @@ static void tcpnv_acked(struct sock *sk, const struct ack_sample *sample)\n \n \t/* rate in 100's bits per second */\n \trate64 = ((u64)sample->in_flight) * 8000000;\n-\trate = (u32)div64_u64(rate64, (u64)(avg_rtt * 100));\n+\trate = (u32)div64_u64(rate64, (u64)(avg_rtt ?: 1) * 100);\n \n \t/* Remember the maximum rate seen during this RTT\n \t * Note: It may be more than one RTT. This function should be\n", "prefixes": [] }