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=-0.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 70D8DC43603 for ; Thu, 5 Dec 2019 17:13:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 46C8E20801 for ; Thu, 5 Dec 2019 17:13:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1575565984; bh=oZ5H36jNKq0pZIeYVK4xdJP/LLG6BLvyweF1TGeLSPc=; h=References:In-Reply-To:From:Date:Subject:To:Cc:List-ID:From; b=p9xqtTqUh7UT/6XY3Ubf4lE03FxA8SgFF3j3mDV1ggRghCtfW2Ich7Z8sHPI19Z/e GdVRAziUIBVFrtfHcU+lltePdDo7SzBVDp2ZWWAPrGUUGnLktyLOHRGuVLI+PH9P+n P7J1OcA/cDv8O9c0kkZnMHxHhwR5NO82iykYxYsg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730006AbfLERND (ORCPT ); Thu, 5 Dec 2019 12:13:03 -0500 Received: from mail-lj1-f193.google.com ([209.85.208.193]:40521 "EHLO mail-lj1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726028AbfLERND (ORCPT ); Thu, 5 Dec 2019 12:13:03 -0500 Received: by mail-lj1-f193.google.com with SMTP id s22so4448067ljs.7 for ; Thu, 05 Dec 2019 09:13:01 -0800 (PST) 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=zYNLY1IlQbFxutIFweWCQvjwN9b0IsGYV2okK9HrfFg=; b=Q0FUaDCgejnj2j913m9DkZ5BcPyxfvWCsvBxLXqstFY2bocRU9mYGGdVT6TyixAaF9 S2hdwaxlIrLjm/VudylZUBLif/OSS4AVyaDGMpzqZdSB/9DnkfX4SEUoI9oj/pbE/ewR 2kNMP8DNxG23lhz/9/1l0TfZQjJpzTexlyrHc= 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=zYNLY1IlQbFxutIFweWCQvjwN9b0IsGYV2okK9HrfFg=; b=RmD21Jn4i5pGf21BHw/AmtWqeKkekhEVrVFryvWfR0gTeTcFtXWDwvJGHCPpZFyWuG eI8ELJeV+Lpmt7FaNw//TomNvJ3RNALAAsJTxpbZVUExYygrEXYyERGL9C3KhgyGoKZo MsiUf8ydovVKNaJ43olLOpNKQKk75C6+ZHE+FXufb82ELf0pzigF7MMfRCZQLqIzzkfG JryeepsQsKCkUn5CMfL1qNzAvBOgZz9kzOlZv3x7YbzE0FCCKMO7lOJBQWBVMAtcv+xT btcovAHPraTRo1qW/eLUY6CWRyDCPExox7zSKdi/JvTKU8JlBi/iivkRKSkSUzThI0+Z goHg== X-Gm-Message-State: APjAAAUVm+TKYqTrkrDpWhdeupj+ziAiXX8aN9OJczpfouqZvgVQQ2kb 06Bit+XbwMzLwiRh61msGWY9Y/WIQNY= X-Google-Smtp-Source: APXvYqyDtf/ctOK2+aSKlidzXSA7w9aPCAWZrkCuXadQC+p1y1qklP7KzNd9ZZWFRi9M+snMSl7nVw== X-Received: by 2002:a2e:9906:: with SMTP id v6mr6292206lji.90.1575565980546; Thu, 05 Dec 2019 09:13:00 -0800 (PST) Received: from mail-lf1-f52.google.com (mail-lf1-f52.google.com. [209.85.167.52]) by smtp.gmail.com with ESMTPSA id 145sm5251852ljj.69.2019.12.05.09.12.59 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 05 Dec 2019 09:12:59 -0800 (PST) Received: by mail-lf1-f52.google.com with SMTP id m30so3056346lfp.8 for ; Thu, 05 Dec 2019 09:12:59 -0800 (PST) X-Received: by 2002:a19:4351:: with SMTP id m17mr6095833lfj.61.1575565978909; Thu, 05 Dec 2019 09:12:58 -0800 (PST) MIME-Version: 1.0 References: <31452.1574721589@warthog.procyon.org.uk> <20191205125826.GK2734@twin.jikos.cz> <1593.1575554217@warthog.procyon.org.uk> In-Reply-To: <1593.1575554217@warthog.procyon.org.uk> From: Linus Torvalds Date: Thu, 5 Dec 2019 09:12:42 -0800 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [GIT PULL] pipe: Notification queue preparation To: David Howells Cc: David Sterba , Rasmus Villemoes , Greg Kroah-Hartman , Peter Zijlstra , raven@themaw.net, Christian Brauner , keyrings@vger.kernel.org, linux-usb@vger.kernel.org, linux-block , LSM List , linux-fsdevel , Linux API , Linux Kernel Mailing List Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Dec 5, 2019 at 5:57 AM David Howells wrote: > > David Sterba wrote: > > > [<0>] pipe_write+0x1be/0x4b0 > > Can you get me a line number of that? Assuming you've built with -g, load > vmlinux into gdb and do "i li pipe_write+0x1be". If the kernel is built with debug info (which you need for the gdb command anyway), it's much better to just use ./scripts/decode_stacktrace.sh which gives all the information for the whole backtrace. It would be interesting to hear if somebody else is waiting on the read side too. Linus