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 52C51C2BD09 for ; Thu, 5 Dec 2019 17:13:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 28D3424249 for ; Thu, 5 Dec 2019 17:13:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1575565988; bh=oZ5H36jNKq0pZIeYVK4xdJP/LLG6BLvyweF1TGeLSPc=; h=References:In-Reply-To:From:Date:Subject:To:Cc:List-ID:From; b=sZPzBtpLt1bdlWbX6YbXTBIlCyGXPpaJhxpmz7Mw6blV2gSU+40t9X5oh4ymJNg+5 4/y+0sxAHLlhd03+GQ1rXcA9xpX/8vZKWv5w4xN1wYXa+P7xu84vSJY0uiUvEcALX/ OHS/8YMC1NwOWCw26KtThT2h+ABahS1uFrLp8vzs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729430AbfLERNG (ORCPT ); Thu, 5 Dec 2019 12:13:06 -0500 Received: from mail-lf1-f65.google.com ([209.85.167.65]:33420 "EHLO mail-lf1-f65.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729598AbfLERNE (ORCPT ); Thu, 5 Dec 2019 12:13:04 -0500 Received: by mail-lf1-f65.google.com with SMTP id n25so3111608lfl.0 for ; Thu, 05 Dec 2019 09:13:03 -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=twx27coOuu/49xzpKQqpLR09+3mAbsWniPTLV4Nz3U0LzmDbllHq3HIsKgTMv8wtWd nNN5rwyLenIVOlpGkj2qyQ9p3bolyf2Ya8qtig9h4ryzFOAyijLIJqQjlbGjbt+bqphU GMPuN9B4sd8SV1DV7woTip1RQSSK5oWqScPjZvYS1kgpG0fUzTderWRGpA4VU/K4flP/ HYNYevhtDLlF0IDNlc6rpg+eMNvLzto+lljd2S8sgm5xPvjCaWnH1n50BrcXmvjS4Ts7 Ik7IAt2hlBsplQodfZq5kCBz3mUBycUGg6/frJqekMsrpCvfmskWLP4JIvGNQwhieuwq 8l2w== X-Gm-Message-State: APjAAAW7givM1f+d/pue45M8GT02ddlaj1O+vrjKd8C3poVLjp8TomG2 2RbBsulmrWYkF7W3JlmscBUzE57WDag= X-Google-Smtp-Source: APXvYqwe5lcXTnJDO35Df4I6RXW/UzyEDaAB6sQ8/pVfWRNYeAw1EcUF9wrNXo1gztDffmrYtUObeQ== X-Received: by 2002:ac2:48bc:: with SMTP id u28mr5745480lfg.161.1575565981922; Thu, 05 Dec 2019 09:13:01 -0800 (PST) Received: from mail-lf1-f45.google.com (mail-lf1-f45.google.com. [209.85.167.45]) by smtp.gmail.com with ESMTPSA id w6sm5241816ljo.50.2019.12.05.09.12.59 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-f45.google.com with SMTP id v201so3039734lfa.11 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-usb-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-usb@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