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From: Matthew Wilcox <willy@infradead.org>
To: "Theodore Y. Ts'o" <tytso@mit.edu>
Cc: linux-fsdevel@vger.kernel.org, fstests@vger.kernel.org
Subject: Re: commit b4678df184b causing xfstests regressions
Date: Fri, 18 May 2018 19:17:58 -0700	[thread overview]
Message-ID: <20180519021758.GA28858@bombadil.infradead.org> (raw)
In-Reply-To: <20180518225037.GA26206@thunk.org>

On Fri, May 18, 2018 at 06:50:37PM -0400, Theodore Y. Ts'o wrote:
> Hi Matthew,
> 
> Commit b4678df184b: "errseq: Always report a writeback error once"
> appears to be causing xfstests regressions.  For ext4, running
> "gce-xfstests -c 4k -g auto" will result in reliable shared/298
> failures which go away if I revert b4678df184b.

Thanks; I'll take a look.  Monday is a holiday in Canada, so it may be
Tuesday before I get to it.

> Darrick has also reported occasional generic/047 failures, which I
> have seen at least once as well.  I believe two are linked, because
> after instrumenting mke2fs in shared/298, the failure is happening
> after creating a new 300 MB file:
> 
> dd if=/dev/zero of=$img_file bs=1M count=300 &> /dev/null
> 
> creating a new loop device
> 
> loop_dev=$(_create_loop_device $img_file)
> 
> ... and then run mke2fs on that loop device.
> 
> The instrumentation of mke2fs shows that the first fsync() on
> /dev/loop0 (in lib/ext2fs/closefs.c) which is failing with EIO.
> 
> I haven't had a chance to really drill down on it, but I think what is
> going on is there is some former test which exercises an error path
> (using dm_error, or some such), and somehow the errseq_t for the loop
> device isn't getting reset, or the inode for the underlying backing
> file, had an unitialized errseq_t.
> 
> Can you take a closer look at this?
> 
> Thanks,
> 
> 					- Ted
> 
> 

  reply	other threads:[~2018-05-19  2:17 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-18 22:50 Theodore Y. Ts'o
2018-05-19  2:17 ` Matthew Wilcox [this message]
2018-05-19 13:09 ` Jeff Layton
2018-05-19 15:25   ` Darrick J. Wong
2018-05-19 15:27   ` [PATCH] fs: clear writeback errors in inode_init_always Darrick J. Wong
2018-05-19 15:36     ` Matthew Wilcox
2018-05-21 17:54       ` Darrick J. Wong
2018-05-22 10:30         ` Jeff Layton
2018-05-22 22:09           ` Dave Chinner
2018-05-23 10:56             ` Jeff Layton
2018-05-24  3:59               ` Dave Chinner
2018-05-19 23:19     ` Theodore Y. Ts'o
2018-05-20 11:45       ` Jeff Layton
2018-05-20 12:58         ` Matthew Wilcox
2018-05-20 13:18           ` Jeff Layton
2018-05-20 16:29           ` Theodore Y. Ts'o
2018-05-20 19:20             ` Matthew Wilcox
2018-05-20 19:41               ` Theodore Y. Ts'o
2018-05-21 11:20                 ` Jeff Layton
2018-05-21 14:43                   ` Theodore Y. Ts'o
2018-05-20 17:57         ` Theodore Y. Ts'o
2018-05-22  4:06     ` [PATCH v2] " Darrick J. Wong
2018-05-22 10:14       ` Jeff Layton
2018-05-22 12:14       ` Brian Foster
2018-05-22 14:37         ` Darrick J. Wong
2018-05-22 16:43     ` [PATCH v3] " Darrick J. Wong
2018-05-22 18:40       ` Brian Foster
2018-05-22 18:47         ` Darrick J. Wong
2018-05-22 22:05       ` Dave Chinner
2018-05-23  3:00         ` Darrick J. Wong

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