From: Eryu Guan <eguan@redhat.com>
To: linux-xfs@vger.kernel.org
Subject: [BUG] dd doesn't return on ENOSPC and hang when fulfilling rmapbt XFS
Date: Fri, 18 Nov 2016 00:35:15 +0800 [thread overview]
Message-ID: <20161117163515.GB27776@eguan.usersys.redhat.com> (raw)
Hi all,
I hit a test hang in generic/224 when testing rmapbt enabled XFS on a
host that has non-zero sunit/swidth reported from underlying device. And
I simplified the reproducer to the following script, and the hang can be
reproduced on any host now.
-----
#!/bin/bash
dev=/dev/sda5
mnt=/mnt/xfs
mkfs -t xfs -m rmapbt=1 -d agcount=8,size=1g -f $dev
mount $dev $mnt
xfs_io -x -c "resblks 4" $mnt
dd if=/dev/zero of=/mnt/xfs/testfile
echo "dd should return and report ENOSPC"
-----
sysrq-w output:
sysrq: SysRq : Show Blocked State
task PC stack pid father
dd D 0 2504 2491 0x00000080
ffff88021077dd00 0000000000000000 ffff88021623be40 ffff88021fd99300
ffff8802107467c0 ffffc900019dbc18 ffffffff816e2cf5 ffff88020fa8ce90
ffffc900019dbc40 0000000000000286 ffff8802107467c0 ffff88020fa8ce90
Call Trace:
[<ffffffff816e2cf5>] ? __schedule+0x195/0x630
[<ffffffff816e31c6>] schedule+0x36/0x80
[<ffffffff812534b4>] wb_wait_for_completion+0x64/0x90
[<ffffffff810d2910>] ? prepare_to_wait_event+0xf0/0xf0
[<ffffffff81255b3d>] sync_inodes_sb+0xad/0x290
[<ffffffff81288bc0>] ? iomap_write_end+0x80/0x80
[<ffffffff8128922c>] ? iomap_apply+0x6c/0x130
[<ffffffffa014c2a8>] xfs_flush_inodes+0x28/0x40 [xfs]
[<ffffffffa013370b>] xfs_file_buffered_aio_write+0x18b/0x280 [xfs]
[<ffffffffa0133890>] xfs_file_write_iter+0x90/0x130 [xfs]
[<ffffffff81226b52>] __vfs_write+0xe2/0x140
[<ffffffff812279d2>] vfs_write+0xb2/0x1b0
[<ffffffff81003510>] ? syscall_trace_enter+0x1d0/0x2b0
[<ffffffff81228e25>] SyS_write+0x55/0xc0
[<ffffffff81003a47>] do_syscall_64+0x67/0x180
[<ffffffff816e796b>] entry_SYSCALL64_slow_path+0x25/0x25
I tested on 4.9-rc5 kernel, for-next branch from linux-xfs tree and
latest djwong-devel branch from Darrick's tree.
If you need more information please let me know.
Thanks,
Eryu
next reply other threads:[~2016-11-17 17:11 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-17 16:35 Eryu Guan [this message]
2016-11-17 17:36 ` [BUG] dd doesn't return on ENOSPC and hang when fulfilling rmapbt XFS Darrick J. Wong
2016-11-17 20:11 ` Darrick J. Wong
2016-11-17 21:32 ` Dave Chinner
2016-11-17 23:55 ` [PATCH 0/4] xfs: fix rmapbt ENOSPC hangs Dave Chinner
2016-11-17 23:55 ` [PATCH 1/4] xfs: factor rmap btree size into the indlen calculations Dave Chinner
2016-11-17 23:55 ` [PATCH 2/4] xfs: add more AGF/AGFL manipulation tracepoints Dave Chinner
2016-11-17 23:55 ` [PATCH 3/4] xfs: hold AGF buffers over defer ops Dave Chinner
2016-11-18 0:53 ` Dave Chinner
2016-11-17 23:55 ` [PATCH 4/4] xfs: defer indirect delalloc rmap reservations Dave Chinner
2016-11-18 5:26 ` [BUG] dd doesn't return on ENOSPC and hang when fulfilling rmapbt XFS Eryu Guan
2016-11-18 5:46 ` Dave Chinner
2016-11-18 6:52 ` Eryu Guan
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