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=-7.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,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 A9810C43603 for ; Wed, 4 Dec 2019 16:17:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 76B822077B for ; Wed, 4 Dec 2019 16:17:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728326AbfLDQRa (ORCPT ); Wed, 4 Dec 2019 11:17:30 -0500 Received: from mx2.suse.de ([195.135.220.15]:33134 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727912AbfLDQRa (ORCPT ); Wed, 4 Dec 2019 11:17:30 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id DF5A2AECB; Wed, 4 Dec 2019 16:17:28 +0000 (UTC) Received: by ds.suse.cz (Postfix, from userid 10065) id D67A5DA786; Wed, 4 Dec 2019 17:17:23 +0100 (CET) Date: Wed, 4 Dec 2019 17:17:23 +0100 From: David Sterba To: Qu Wenruo Cc: "linux-btrfs@vger.kernel.org" Subject: Re: btrfs-progs: misc/016 hangs at ioctl Message-ID: <20191204161723.GE2734@twin.jikos.cz> Reply-To: dsterba@suse.cz Mail-Followup-To: dsterba@suse.cz, Qu Wenruo , "linux-btrfs@vger.kernel.org" References: <3b8f824f-0c55-b54b-e23d-257ad1b2f239@gmx.com> <0a3fa957-b551-022b-8f6a-129e117626a7@gmx.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <0a3fa957-b551-022b-8f6a-129e117626a7@gmx.com> User-Agent: Mutt/1.5.23.1-rc1 (2014-03-12) Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org On Wed, Dec 04, 2019 at 02:08:14PM +0800, Qu Wenruo wrote: > On 2019/12/4 下午2:06, Qu Wenruo wrote: > > Found a strange failure at btrfs-progs selftest misc/016. > > > > It hangs at current master 63de37476ebd ("Merge tag > > 'tag-chrome-platform-for-v5.5' of > > git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux"). > > > > What makes it even more mysterious is, misc-5.5 passes. > > > > Since there is no other btrfs pull, it's caused by some upstream > > non-btrfs commits. > > BTW, no blocked kernel thread, no CPU usage. > > And the hang can be canceled with a signal. > > > > > Doing bisecting, but any clue will be appreciated. This looks like a problem caused by recent merge of updates to pipe (commit 6a965666b7e7475c2f8c8e724703db58b8a8a445). I can reproduce that and now building test kernel before that commit. As this also blocks all fstests that use send, we have to wait until it's fixed in master branch.