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 X-Spam-Level: X-Spam-Status: No, score=-5.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D3AD5C4338F for ; Tue, 24 Aug 2021 17:31:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B3D1D60231 for ; Tue, 24 Aug 2021 17:31:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239754AbhHXRcR (ORCPT ); Tue, 24 Aug 2021 13:32:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34396 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241441AbhHXR3R (ORCPT ); Tue, 24 Aug 2021 13:29:17 -0400 Received: from mail-lj1-x235.google.com (mail-lj1-x235.google.com [IPv6:2a00:1450:4864:20::235]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3D3D6C06114B for ; Tue, 24 Aug 2021 10:00:53 -0700 (PDT) Received: by mail-lj1-x235.google.com with SMTP id i28so38809623ljm.7 for ; Tue, 24 Aug 2021 10:00:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=dL9ba3yUu6lSJ0YhxN/X5vzaVX0fX38NNuDKyk4dZZI=; b=YZ4Ro47ELEDWuai57Dne3vrEso9qPxNoHIDO/4mRCB5MMRJWwZ2M3peJcvzynsOo5y Pqo3xyqBOUtVLE7GPn/c0Zmdrl71Re2BysX+3tnTueSeITJtmfqTf4nJVt6uys7Mab7m X4wADbNkN2ugEPhpsNnPSAA7HVwg+MA8y2eVM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=dL9ba3yUu6lSJ0YhxN/X5vzaVX0fX38NNuDKyk4dZZI=; b=X+S4eNSbBFZucTltZoj5ZQ8or18K0mdRV4d3fAnUC0fRhIiD1FNwxCCPO3D0yP8/Yw YnKtKzme0BciEqaACE6nhZOCBwjjGgLg2+KSADqf90moHkTOYzLI8ygryb7voxrQZASD YF+fhnzCLxVfV1twLUtyIq7IkY4FHu0Rhzi+IzDpNrFdxQjKPI+AZEo64TWwPEkszxQh J+FKVG9RdVTiKFWtIwlSyLFYxKz//yrejH43cPEV9SBoERsXBdOb++qR23779PtSBBXA Dlkb6Ao8Nkr/734AfufdgEv6XBc6zl4Y2/NlBYKKYO3iNNIpwlZby3eDUcZDCc6tT9kK HhBw== X-Gm-Message-State: AOAM533q2gnq7zfzrA27M9gqyZAAFR0TOJJxRrxi0onJLM3aHpM3H2Wa 9NKjdf+t8R/9qA07aqEaF3++x0ufUPEwFlPZ X-Google-Smtp-Source: ABdhPJwWX4YrfJE5Hxf4n9W6uIaeZbwPFEhenfLjznSKdPbzkemZ+qwG3upexNKiDZuIQMbcccqSHw== X-Received: by 2002:a2e:89d8:: with SMTP id c24mr32521503ljk.419.1629824451482; Tue, 24 Aug 2021 10:00:51 -0700 (PDT) Received: from mail-lj1-f172.google.com (mail-lj1-f172.google.com. [209.85.208.172]) by smtp.gmail.com with ESMTPSA id f24sm1805583lfh.241.2021.08.24.10.00.50 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 24 Aug 2021 10:00:50 -0700 (PDT) Received: by mail-lj1-f172.google.com with SMTP id y6so38850306lje.2 for ; Tue, 24 Aug 2021 10:00:50 -0700 (PDT) X-Received: by 2002:a2e:3004:: with SMTP id w4mr30290770ljw.465.1629824449585; Tue, 24 Aug 2021 10:00:49 -0700 (PDT) MIME-Version: 1.0 References: <20210824165607.709387-1-sashal@kernel.org> <20210824165607.709387-74-sashal@kernel.org> In-Reply-To: <20210824165607.709387-74-sashal@kernel.org> From: Linus Torvalds Date: Tue, 24 Aug 2021 10:00:33 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH 5.13 073/127] pipe: avoid unnecessary EPOLLET wakeups under normal loads To: Sasha Levin Cc: Linux Kernel Mailing List , stable , kernel test robot , Sandeep Patil , Mel Gorman Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Aug 24, 2021 at 9:57 AM Sasha Levin wrote: > > From: Linus Torvalds > > [ Upstream commit 3b844826b6c6affa80755254da322b017358a2f4 ] This one has an odd performance regression report associated with it. Honestly, I don't understand the performance regression, but that's likely on me, not on the kernel test robot. So I'd hold off on applying it for now. It *might* be some odd test robot hiccup, but .. Linus