linux-kernel - Re: [PATCH block/for-linus] writeback: fix syncing of I_DIRTY

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Message-ID: <20150820143735.GJ17933@dhcp-13-216.nay.redhat.com>
Date:	Thu, 20 Aug 2015 22:37:35 +0800
From:	Eryu Guan <eguan@...hat.com>
To:	Dave Chinner <david@...morbit.com>
Cc:	Tejun Heo <tj@...nel.org>, Jens Axboe <axboe@...nel.dk>,
	Jan Kara <jack@...e.cz>, linux-kernel@...r.kernel.org,
	xfs@....sgi.com, axboe@...com, Jan Kara <jack@...e.com>,
	linux-fsdevel@...r.kernel.org, kernel-team@...com
Subject: Re: [PATCH block/for-linus] writeback: fix syncing of I_DIRTY_TIME
 inodes

On Thu, Aug 20, 2015 at 10:36:26PM +0800, Eryu Guan wrote:
> On Thu, Aug 20, 2015 at 02:12:24PM +0800, Eryu Guan wrote:
[snip]
> 
> I installed a new vm with ext4 as root fs and got some trace info.
> 
> On the new vm, only generic/048 is reproducible, generic/049 always
> passes. And I can only reproduce generic/048 when xfs tracepoints are
> enabled, if writeback tracepoints are enabled too, I can no longer
> reproduce the failure.
> 
> All tests are done on 4.2-rc7 kernel.
> 
> This is the trace-cmd I'm using:
> 
> 	cd /mnt/ext4
> 	trace-cmd record -e xfs_file_buffered_write \
> 			 -e xfs_file_fsync \
> 			 -e xfs_writepage \
> 			 -e xfs_setfilesize &
> 	pushd /path/to/xfstests
> 	./check generic/048
> 	popd
> 	kill -s 2 $!
> 	trace-cmd report >trace_report.txt
> 
> I attached three files:
> 1) xfs-trace-generic-048.txt.bz2[1]	trace report result
> 2) xfs-trace-generic-048.diff		generic/048 failure diff output, could know which files has incorrect size
> 3) xfs-trace-generic-048.metadump.bz2	metadump of SCRATCH_DEV, which contains the test files
> 
> If more info is needed please let me know.
> 
> Thanks,
> Eryu
> 
> [1] attach this file in a following mail, to avoid xfs list 500k limit

Attached this file in this mail.

Eryu

Download attachment "xfs-trace-generic-048.txt.bz2" of type "application/x-bzip2" (414951 bytes)