Patch Detail
get:
Show a patch.
patch:
Update a patch.
put:
Update a patch.
GET /api/patches/808217/?format=api
{ "id": 808217, "url": "http://patchwork.ozlabs.org/api/patches/808217/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netdev/patch/1504180422.15310.12.camel@edumazet-glaptop3.roam.corp.google.com/", "project": { "id": 7, "url": "http://patchwork.ozlabs.org/api/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": "<1504180422.15310.12.camel@edumazet-glaptop3.roam.corp.google.com>", "list_archive_url": null, "date": "2017-08-31T11:53:42", "name": "[net-next] x86: bpf_jit: small optimization in emit_bpf_tail_call()", "commit_ref": null, "pull_url": null, "state": "accepted", "archived": true, "hash": "05407d8143fc850a1d94c72d430e6dc2ab83f80e", "submitter": { "id": 2404, "url": "http://patchwork.ozlabs.org/api/people/2404/?format=api", "name": "Eric Dumazet", "email": "eric.dumazet@gmail.com" }, "delegate": { "id": 34, "url": "http://patchwork.ozlabs.org/api/users/34/?format=api", "username": "davem", "first_name": "David", "last_name": "Miller", "email": "davem@davemloft.net" }, "mbox": "http://patchwork.ozlabs.org/project/netdev/patch/1504180422.15310.12.camel@edumazet-glaptop3.roam.corp.google.com/mbox/", "series": [ { "id": 808, "url": "http://patchwork.ozlabs.org/api/series/808/?format=api", "web_url": "http://patchwork.ozlabs.org/project/netdev/list/?series=808", "date": "2017-08-31T11:53:42", "name": "[net-next] x86: bpf_jit: small optimization in emit_bpf_tail_call()", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/808/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/808217/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/808217/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 (2048-bit key;\n\tunprotected) header.d=gmail.com header.i=@gmail.com\n\theader.b=\"GoG45FA/\"; dkim-atps=neutral" ], "Received": [ "from vger.kernel.org (vger.kernel.org [209.132.180.67])\n\tby ozlabs.org (Postfix) with ESMTP id 3xjgkh6H9Jz9s81\n\tfor <patchwork-incoming@ozlabs.org>;\n\tThu, 31 Aug 2017 21:53:48 +1000 (AEST)", "(majordomo@vger.kernel.org) by vger.kernel.org via listexpand\n\tid S1751325AbdHaLxr (ORCPT <rfc822;patchwork-incoming@ozlabs.org>);\n\tThu, 31 Aug 2017 07:53:47 -0400", "from mail-io0-f194.google.com ([209.85.223.194]:33168 \"EHLO\n\tmail-io0-f194.google.com\" rhost-flags-OK-OK-OK-OK) by vger.kernel.org\n\twith ESMTP id S1750893AbdHaLxp (ORCPT\n\t<rfc822;netdev@vger.kernel.org>); Thu, 31 Aug 2017 07:53:45 -0400", "by mail-io0-f194.google.com with SMTP id f99so1167861ioi.0\n\tfor <netdev@vger.kernel.org>; Thu, 31 Aug 2017 04:53:45 -0700 (PDT)", "from [192.168.86.171] (c-67-180-167-114.hsd1.ca.comcast.net.\n\t[67.180.167.114]) by smtp.googlemail.com with ESMTPSA id\n\tk28sm3690044iod.48.2017.08.31.04.53.43\n\t(version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);\n\tThu, 31 Aug 2017 04:53:44 -0700 (PDT)" ], "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:mime-version\n\t:content-transfer-encoding;\n\tbh=WwO12FZtQnyuh+fFMfiQ2iihxcfYIIcLqbCfD1Wu/PI=;\n\tb=GoG45FA/CSdWfPo0I+v4zBvhJUfYXtgd8K0nhVUe/SOrR23uV2Mrxu99l5QXMUu62O\n\tJ6IHiKEK9c3dE2tuY32DeNLcQ/g/29uMIcMM5S4qKuCpwMD27Mn6Ga/Rhe2DBpy+qjiz\n\tCcMLjJSJZ7ulJR4kl9VnFeKZOlxI7IC2wBWQ3pNVD8HDXBD0fMkE/ZolzEb6VoyKyNgB\n\tMTe8aPq3+MdTwdhL33meFJuYoip1/t3etUZTw+eV9sI4Ke9TyLzlqf50gpZeK/Eyvek+\n\tcVBSbl+MmLsQYMQggMKeXxbnDhewP3sCnrfdZVPi0T1UlYe7o3sq3uIedjXbZLhVTj0S\n\tjajw==", "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:mime-version\n\t:content-transfer-encoding;\n\tbh=WwO12FZtQnyuh+fFMfiQ2iihxcfYIIcLqbCfD1Wu/PI=;\n\tb=Jt59ttgaHoByWv4MI/OOrAbMSSicf+CCN1vxLCp7rmHHkqC9jpZhQQsXu2EFihp8wz\n\t+fpSLP9uvmr+FoIgVDMPkrBq4fL7K7VnaljsdP7fRDHekD7FIP0hgm5f0X0Ho3o2QLN6\n\tozMm0BSWabV1iwrtd1hf5LqMNF8F4FHqvnH16yxI4i1usvjIMdGfr/HQt2HBIOFIbqEh\n\tFS51RMttgo/fIvDRa9n2q1AiX9wIvAFmlRnmI4FWYzv0EpfoIflp6Bh7LOzYrzmnnsoK\n\tKPmbvcCy3qxnFovh0YKCF0PwLNFxyqt99qpkbjFu4PPgsYOBPn1f9koK6MKuPI3X9d9F\n\tPIBQ==", "X-Gm-Message-State": "AHPjjUgAuGCixvq2toyGvxu0qRUVC8wXoteHC6bHvJIZXp4xD7ubuqef\n\to0pDDIBLV2ls5bBd", "X-Google-Smtp-Source": "ADKCNb4K7H95Im9dzi3tDRCYji5bNhLRzgqjmAvyaMYJT+9zXGWbhlHKGpyLAk3d8rtkxutIQU8FYw==", "X-Received": "by 10.107.128.86 with SMTP id b83mr4222399iod.266.1504180425062; \n\tThu, 31 Aug 2017 04:53:45 -0700 (PDT)", "Message-ID": "<1504180422.15310.12.camel@edumazet-glaptop3.roam.corp.google.com>", "Subject": "[PATCH net-next] x86: bpf_jit: small optimization in\n\temit_bpf_tail_call()", "From": "Eric Dumazet <eric.dumazet@gmail.com>", "To": "David Miller <davem@davemloft.net>", "Cc": "netdev <netdev@vger.kernel.org>, Alexei Starovoitov <ast@kernel.org>,\n\tDaniel Borkmann <daniel@iogearbox.net>", "Date": "Thu, 31 Aug 2017 04:53:42 -0700", "Content-Type": "text/plain; charset=\"UTF-8\"", "X-Mailer": "Evolution 3.10.4-0ubuntu2 ", "Mime-Version": "1.0", "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": "From: Eric Dumazet <edumazet@google.com>\n\nSaves 4 bytes replacing following instructions :\n\nlea rax, [rsi + rdx * 8 + offsetof(...)] \nmov rax, qword ptr [rax]\ncmp rax, 0\n\nby :\n\nmov rax, [rsi + rdx * 8 + offsetof(...)] \ntest rax, rax\n\nSigned-off-by: Eric Dumazet <edumazet@google.com>\nCc: Alexei Starovoitov <ast@kernel.org>\nCc: Daniel Borkmann <daniel@iogearbox.net>\n---\n arch/x86/net/bpf_jit_comp.c | 9 ++++-----\n 1 file changed, 4 insertions(+), 5 deletions(-)", "diff": "diff --git a/arch/x86/net/bpf_jit_comp.c b/arch/x86/net/bpf_jit_comp.c\nindex 8194696e2805852a8246bf1db2a5862d5758f76b..7af5ee584bf8546f3c1b92df9d9f513416f2089d 100644\n--- a/arch/x86/net/bpf_jit_comp.c\n+++ b/arch/x86/net/bpf_jit_comp.c\n@@ -287,7 +287,7 @@ static void emit_bpf_tail_call(u8 **pprog)\n \tEMIT4(0x48, 0x8B, 0x46, /* mov rax, qword ptr [rsi + 16] */\n \t offsetof(struct bpf_array, map.max_entries));\n \tEMIT3(0x48, 0x39, 0xD0); /* cmp rax, rdx */\n-#define OFFSET1 47 /* number of bytes to jump */\n+#define OFFSET1 43 /* number of bytes to jump */\n \tEMIT2(X86_JBE, OFFSET1); /* jbe out */\n \tlabel1 = cnt;\n \n@@ -296,21 +296,20 @@ static void emit_bpf_tail_call(u8 **pprog)\n \t */\n \tEMIT2_off32(0x8B, 0x85, 36); /* mov eax, dword ptr [rbp + 36] */\n \tEMIT3(0x83, 0xF8, MAX_TAIL_CALL_CNT); /* cmp eax, MAX_TAIL_CALL_CNT */\n-#define OFFSET2 36\n+#define OFFSET2 32\n \tEMIT2(X86_JA, OFFSET2); /* ja out */\n \tlabel2 = cnt;\n \tEMIT3(0x83, 0xC0, 0x01); /* add eax, 1 */\n \tEMIT2_off32(0x89, 0x85, 36); /* mov dword ptr [rbp + 36], eax */\n \n \t/* prog = array->ptrs[index]; */\n-\tEMIT4_off32(0x48, 0x8D, 0x84, 0xD6, /* lea rax, [rsi + rdx * 8 + offsetof(...)] */\n+\tEMIT4_off32(0x48, 0x8B, 0x84, 0xD6, /* mov rax, [rsi + rdx * 8 + offsetof(...)] */\n \t\t offsetof(struct bpf_array, ptrs));\n-\tEMIT3(0x48, 0x8B, 0x00); /* mov rax, qword ptr [rax] */\n \n \t/* if (prog == NULL)\n \t * goto out;\n \t */\n-\tEMIT4(0x48, 0x83, 0xF8, 0x00); /* cmp rax, 0 */\n+\tEMIT3(0x48, 0x85, 0xC0);\t\t /* test rax,rax */\n #define OFFSET3 10\n \tEMIT2(X86_JE, OFFSET3); /* je out */\n \tlabel3 = cnt;\n", "prefixes": [ "net-next" ] }