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Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1rJdfK-007C9z-VU; Sat, 30 Dec 2023 18:02:31 +0000 Date: Sat, 30 Dec 2023 18:02:30 +0000 From: Matthew Wilcox To: Genes Lists Cc: linux-kernel@vger.kernel.org, Andrew Morton , linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: Re: 6.6.8 stable: crash in folio_mark_dirty Message-ID: References: <8bb29431064fc1f70a42edef75a8788dd4a0eecc.camel@sapience.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <8bb29431064fc1f70a42edef75a8788dd4a0eecc.camel@sapience.com> X-Rspamd-Queue-Id: C282E4000C X-Rspam-User: X-Stat-Signature: 8jn1k8t4bmzecb4uhb1584xz1yxgd5as X-Rspamd-Server: rspam03 X-HE-Tag: 1703959358-430742 X-HE-Meta: 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 PqRq/teH uvy5WlfdzMOv2Nd7OqdKahwUoQlGogYkVFpM/lYXopgUGscqtcyMI6OyisK+PoZzpv0LnPVOmnxkzlAB5z5bKQF1d1Iv8YvfYVdljd0+KrQBrnSMWiyYqgiaufdMhbo521lDRYDjsCAYV0B9R2s6b6bpkQNlY+aOID069pIF+he+bCQESavMNZnWwvA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Sat, Dec 30, 2023 at 10:23:26AM -0500, Genes Lists wrote: > Apologies in advance, but I cannot git bisect this since machine was > running for 10 days on 6.6.8 before this happened. Thanks for the report. Apologies, I'm on holiday until the middle of the week so this will be extremely terse. > - Root, efi is on nvme > - Spare root,efi is on sdg > - md raid6 on sda-sd with lvmcache from one partition on nvme drive. > - all filesystems are ext4 (other than efi). > - 32 GB mem. > Dec 30 07:00:36 s6 kernel: ------------[ cut here ]------------ > Dec 30 07:00:36 s6 kernel: WARNING: CPU: 0 PID: 521524 at mm/page-writeback.c:2668 __folio_mark_dirty (??:?) This is: WARN_ON_ONCE(warn && !folio_test_uptodate(folio)); > Dec 30 07:00:36 s6 kernel: CPU: 0 PID: 521524 Comm: rsync Not tainted 6.6.8-stable-1 #13 d238f5ab6a206cdb0cc5cd72f8688230f23d58df So rsync is exiting. Do you happen to know what rsync is doing? > Dec 30 07:00:36 s6 kernel: block_dirty_folio (??:?) > Dec 30 07:00:36 s6 kernel: unmap_page_range (??:?) > Dec 30 07:00:36 s6 kernel: unmap_vmas (??:?) > Dec 30 07:00:36 s6 kernel: exit_mmap (??:?) > Dec 30 07:00:36 s6 kernel: __mmput (??:?) > Dec 30 07:00:36 s6 kernel: do_exit (??:?) > Dec 30 07:00:36 s6 kernel: do_group_exit (??:?) > Dec 30 07:00:36 s6 kernel: __x64_sys_exit_group (??:?) > Dec 30 07:00:36 s6 kernel: do_syscall_64 (??:?) It looks llike rsync has a page from the block device mmaped? I'll have to investigate this properly when I'm back. If you haven't heard from me in a week, please ping me. (I don't think I caused this, but I think I stand a fighting chance of tracking down what the problem is, just not right now).