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=-5.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=ham 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 CC951C2D0CE for ; Tue, 21 Jan 2020 19:49:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 969A721835 for ; Tue, 21 Jan 2020 19:49:37 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="S+I9C+U9" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727847AbgAUTth (ORCPT ); Tue, 21 Jan 2020 14:49:37 -0500 Received: from mail-pf1-f196.google.com ([209.85.210.196]:38274 "EHLO mail-pf1-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727829AbgAUTth (ORCPT ); Tue, 21 Jan 2020 14:49:37 -0500 Received: by mail-pf1-f196.google.com with SMTP id x185so2021920pfc.5 for ; Tue, 21 Jan 2020 11:49:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=cc:subject:to:references:from:message-id:date:user-agent :mime-version:in-reply-to:content-language:content-transfer-encoding; bh=OouaVjQHMuEXSKzSUXAc1WlydrV/FF4E9fbPEy445R8=; b=S+I9C+U9ezJzAGj/L4W7NZCosINdqzwNACn9Jbz1OidzZD+ISghi27+i24xAwn5LLR z3qJ8fF9DncIIegb+5UTFk68CLo8MEq8QP/LlovHAvNAbqqzTy93rC6nE8M3ZZzo8b4R wd6dZWjGVT9BMBXER/QzbPL74q/JvzC5oBf4jUgmEyhDwef3PtjX6JsYi7lHy3Y5uRa/ zP6rAcn8FDlKNxa3EsiCaqRWrBY+0hg1kiVQkXkKfbXrSEDmkXooZ+YN0jqR3+OHTreL 9Sgzf6vkhNem9rlspho41NpV2Lk6JrrhYGraSJaf+i7VkH8CEqG1BAMm1/9wltMlLd/V JzmA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:cc:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-language :content-transfer-encoding; bh=OouaVjQHMuEXSKzSUXAc1WlydrV/FF4E9fbPEy445R8=; b=SoN/QbNBsqPINV7vvgabCY0QWjiWnaysntJciQbgpoZGOBeUoABn7JbuTcV0QyE713 0l/t9QPF8O0yr82GUu2rVJe5Et4SlhiwmA8To/fJcRzFcx4OUMTHVUDZybRZP97Z5Mpk dZPgGRW7XXBw1YuaL46bbMIoUHGGoChBajNHELs1Vwr1mJGaA+likE28fYPgZ1Lw6wL+ ZsUTdadA3aH0rCxij6oHGJLQjORbvEsP43o3HKaEp6SxbbFpeYyKX8aZlrdNp7guQQl5 llC8aHxRoEuVGsfXI2fzPfwH3X+3Pc9fszYGA8O5CPkIoz+CXpO1DA2V0knahzAfO4td 6bQg== X-Gm-Message-State: APjAAAUMstdf/O7EnTO83CWHwDhZV2g+V9EcKP29NIer2mTliMMvIjrB Uj1Juewf3bxGZQE+51GftJ4= X-Google-Smtp-Source: APXvYqzKLEyOe5qpauGJQQ8duIkzB/1Hd7GoNEL3om//tIB806LQV1FMSVP2c0P94I0UcshP+KLY8A== X-Received: by 2002:a63:9d07:: with SMTP id i7mr7579848pgd.344.1579636176545; Tue, 21 Jan 2020 11:49:36 -0800 (PST) Received: from [192.168.1.72] (122-58-99-230-adsl.sparkbb.co.nz. [122.58.99.230]) by smtp.gmail.com with ESMTPSA id 132sm9607115pgd.76.2020.01.21.11.49.33 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 21 Jan 2020 11:49:35 -0800 (PST) Cc: mtk.manpages@gmail.com, linux-man , Tim Murray Subject: Re: [PATCH] Mention EINTR for perf_event_open To: Daniel Colascione References: From: "Michael Kerrisk (man-pages)" Message-ID: <2d5539fb-7b21-64b0-7cee-9ef9858c1738@gmail.com> Date: Tue, 21 Jan 2020 20:49:32 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.3.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-man-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-man@vger.kernel.org On 1/9/20 12:57 AM, Daniel Colascione wrote: > Somewhat surprisingly, perf_event_open can fail with EINTR when trying > to enable perf reporting for a uprobe that's already been configured > for use with ftrace. Mention this error in the man page. Thanks, Daniel. Patch applied. Cheers, Michael > diff --git a/man2/perf_event_open.2 b/man2/perf_event_open.2 > index 25876c36c..b9128f542 100644 > --- a/man2/perf_event_open.2 > +++ b/man2/perf_event_open.2 > @@ -3228,6 +3228,10 @@ values are out of range or set reserved bits; > the generic event selected is not supported; or > there is not enough room to add the selected event. > .TP > +.B EINTR > +Returned when trying to mix perf and ftrace handling > +for a uprobe. > +.TP > .B EMFILE > Each opened event uses one file descriptor. > If a large number of events are opened, > -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/