From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933079AbcLMLmO (ORCPT ); Tue, 13 Dec 2016 06:42:14 -0500 Received: from mx2.suse.de ([195.135.220.15]:42770 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932369AbcLMLmM (ORCPT ); Tue, 13 Dec 2016 06:42:12 -0500 Date: Tue, 13 Dec 2016 12:42:08 +0100 From: Jan Kara To: "Huang, Ying" Cc: Jan Kara , kernel test robot , "Theodore Ts'o" , linux-nvdimm@ml01.01.org, Dave Chinner , LKML , Ross Zwisler , linux-ext4@vger.kernel.org, lkp@01.org Subject: Re: [LKP] [ext4] e2ae766c1b: BUG:sleeping_function_called_from_invalid_context_at_kernel/locking/rwsem.c Message-ID: <20161213114208.GF15362@quack2.suse.cz> References: <20161212101321.GA37214@inn.lkp.intel.com> <20161212163518.GA20728@quack2.suse.cz> <87mvg08voo.fsf@yhuang-dev.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87mvg08voo.fsf@yhuang-dev.intel.com> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue 13-12-16 09:27:51, Huang, Ying wrote: > Jan Kara writes: > > > On Mon 12-12-16 18:13:21, kernel test robot wrote: > >> FYI, we noticed the following commit: > >> > >> commit: e2ae766c1b030271b5099b25674e2131d1d1e8c1 ("ext4: convert DAX faults to iomap infrastructure") > >> https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git dev > >> > >> in testcase: nvml > >> with following parameters: > >> > >> group: vmem > >> test: pmem > >> nr_pmem: 1 > >> fs: ext4 > >> mount_option: dax > >> > >> > >> > >> on test machine: 64 threads Intel(R) Xeon(R) CPU E5-4650 0 @ 2.70GHz with 64G memory > >> > >> caused below changes: > >> > >> > >> +------------------------------------------------+------------+------------+ > >> | | 96f8ba3dd6 | e2ae766c1b | > >> +------------------------------------------------+------------+------------+ > >> | boot_successes | 2 | 2 | > >> | boot_failures | 2 | 2 | > >> | BUG:kernel_hang_in_test_stage | 2 | | > >> | WARNING:at_fs/sysfs/dir.c:#sysfs_warn_dup | 0 | 2 | > >> | calltrace:parport_pc_init | 0 | 2 | > >> | calltrace:SyS_finit_module | 0 | 2 | > >> | WARNING:at_lib/kobject.c:#kobject_add_internal | 0 | 2 | > >> +------------------------------------------------+------------+------------+ > >> > >> > >> > >> user :notice: [ 325.592182] vmem_aligned_alloc/TEST1: SETUP (check/pmem/debug) > >> > >> user :notice: [ 325.603973] vmem_aligned_alloc/TEST1: START: vmem_aligned_alloc > >> kern :err : [ 325.608906] BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:51 > >> kern :err : [ 325.608908] in_atomic(): 1, irqs_disabled(): 0, pid: 24813, name: vmem_aligned_al > >> kern :warn : [ 325.608914] CPU: 44 PID: 24813 Comm: vmem_aligned_al Tainted: G O 4.9.0-rc4-00045-ge2ae766 #1 > >> kern :warn : [ 325.608916] Hardware name: Intel Corporation LH Pass/S4600LH...., BIOS SE5C600.86B.99.02.1047.032320122259 03/23/2012 > >> kern :warn : [ 325.608922] ffffc9002c1f7be0 > >> kern :warn : [ 325.608923] ffffffff81466af9 > >> kern :warn : [ 325.608924] ffff880fea2425c0 > > > > I think this is actually a bug introduced by Ross' PMD support. Attached > > patch should fix it. Ross, can you check it please? > > Hi, Jan > > Could you provide a git tree commit for me to test it? If you want it > to be tested by 0day. Thanks for the offer! I've pushed out the latest version of my DAX patches including the above fix to git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs.git dax Honza -- Jan Kara SUSE Labs, CR