From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E8039C3DA7A for ; Fri, 6 Jan 2023 16:22:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234383AbjAFQWZ (ORCPT ); Fri, 6 Jan 2023 11:22:25 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46244 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229498AbjAFQWX (ORCPT ); Fri, 6 Jan 2023 11:22:23 -0500 Received: from mail-il1-x131.google.com (mail-il1-x131.google.com [IPv6:2607:f8b0:4864:20::131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5A9F876232 for ; Fri, 6 Jan 2023 08:22:22 -0800 (PST) Received: by mail-il1-x131.google.com with SMTP id u8so1179715ilq.13 for ; Fri, 06 Jan 2023 08:22:22 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20210112.gappssmtp.com; s=20210112; h=content-transfer-encoding:subject:from:cc:to:content-language :user-agent:mime-version:date:message-id:from:to:cc:subject:date :message-id:reply-to; bh=hKrvk1I9tbRGAfYUm/gW03wBpG8HJIHL12UJBL3z+To=; b=fVYFOFMxnEtwpvEBp/4AqzXW+zluAxvyP7nkCgzHEaud074vcfUE3ZncxZDiu7X95Y Qy98Xao9awJP3YikhKgBy/5Yb6sDo9m1hKAGo/IeA3Cx6/Kg4W4HTC2zLcjeJWkMb1Im rTVHJvkAzBqDRnUIph463le/BMVN4/M1zXZWLO3erBdaDVtiq65WTgncbjmmcEc32q3K Hz6F0hnK40L53BbpNNaFjNVOD0pD548PB0sSVQ1il8u7Y7+1ndllfIv0tYnfUb+TA/fy /oMH32zZ4x9mDRmgaXHAdmMEPzf5DsMY5/ZgzpHHpBvHs4qbaTB3v3aMC2xDX7OOzDVl vHSw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:subject:from:cc:to:content-language :user-agent:mime-version:date:message-id:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=hKrvk1I9tbRGAfYUm/gW03wBpG8HJIHL12UJBL3z+To=; b=o9SjidGJoISK0BgkcvTM4Y/a4TO0YvPrr+k3VQQ1/fEeIjH8PhHLgHiF7RmY3zp+L5 OoEP6d3q6LorSDpyf63Mmy1n1GOWzkC5nsOCv+xX+SRJoIhkjqWbQqEI1syEDP8EGkiA y5w+4HCSI8OjctAqTAtxBzqKsovgBvMJGeNne2jCgw3ZQZnA2YpGUOER05y+TF9h65gp nBV8OlZpEZR0PZLK5A9p+YGZHbAIJhFhDTKcQBPUA5NHQbhiKWEtZbb1o019kOR/zegh BP7D+26TxqpuIvz0FptBiRP9DaHeEcIWz6/qTByozuhfmT2XAGhEg5C4+F2CW0SzQ48f PU8w== X-Gm-Message-State: AFqh2ko0CgZjg8f4UAQHAaUZjXsXh2xaQUAPC5vLKkDN277/9eYR8Yqc xWNQ4ezliR4DaeK90HutYnGKwA== X-Google-Smtp-Source: AMrXdXvEvPmtIoojIiBL1/kmPeh+ZDUHi3K48RiIHh8gjvbg/izfk3kjc5riyQ4Zp/9jT/vpeURfrw== X-Received: by 2002:a92:c151:0:b0:303:9c30:7eff with SMTP id b17-20020a92c151000000b003039c307effmr8334031ilh.2.1673022141595; Fri, 06 Jan 2023 08:22:21 -0800 (PST) Received: from [192.168.1.94] ([207.135.234.126]) by smtp.gmail.com with ESMTPSA id a17-20020a92d591000000b0030be6c79645sm469642iln.68.2023.01.06.08.22.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 06 Jan 2023 08:22:21 -0800 (PST) Message-ID: <7839c5ff-13d2-9542-546b-d9cd3e527187@kernel.dk> Date: Fri, 6 Jan 2023 09:22:20 -0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux aarch64; rv:102.0) Gecko/20100101 Thunderbird/102.6.0 Content-Language: en-US To: Linus Torvalds Cc: "Russell King (Oracle)" , LKML , linux-arm-kernel@lists.infradead.org From: Jens Axboe Subject: [GIT PULL] ARM TIF_NOTIFY_SIGNAL fixup Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Linus, Hui Tang reported a performance regressions with _TIF_WORK_MASK in newer kernels, which he tracked to a change that went into 5.11. After this change, we'll call do_work_pending() more often than we need to, because we're now testing bits 0..15 rather than just 0..7. Shuffle the bits around to avoid this. Please pull! The following changes since commit 69b41ac87e4a664de78a395ff97166f0b2943210: Merge tag 'for-6.2-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux (2023-01-02 11:06:18 -0800) are available in the Git repository at: git://git.kernel.dk/linux.git tags/tif-notify-signal-2023-01-06 for you to fetch changes up to 191f8453fc99a537ea78b727acea739782378b0d: ARM: renumber bits related to _TIF_WORK_MASK (2023-01-04 07:55:02 -0700) ---------------------------------------------------------------- tif-notify-signal-2023-01-06 ---------------------------------------------------------------- Jens Axboe (1): ARM: renumber bits related to _TIF_WORK_MASK arch/arm/include/asm/thread_info.h | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) -- Jens Axboe