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| author | jiangyiwen <jiangyiwen@huawei.com> | 2016-03-15 14:53:01 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-03-15 16:55:16 -0700 |
| commit | bfd97a0320d338b2fce422adeddd512466ef2390 (patch) | |
| tree | 713049fa5cc725af82d5738bfae132a2685316f5 /fs/ocfs2/dlm/dlmcommon.h | |
| parent | 4d548f61d61fcaa5b5e14b8d250de9604bdb61bf (diff) | |
| download | linux-bfd97a0320d338b2fce422adeddd512466ef2390.tar.bz2 | |
ocfs2: use spinlock_irqsave() to downconvert lock in ocfs2_osb_dump()
Commit a75e9ccabd92 ("ocfs2: use spinlock irqsave for downconvert lock")
missed an unmodified place in ocfs2_osb_dump(), so it still exists a
deadlock scenario.
ocfs2_wake_downconvert_thread
ocfs2_rw_unlock
ocfs2_dio_end_io
dio_complete
.....
bio_endio
req_bio_endio
....
scsi_io_completion
blk_done_softirq
__do_softirq
do_softirq
irq_exit
do_IRQ
ocfs2_osb_dump
cat /sys/kernel/debug/ocfs2/${uuid}/fs_state
This patch still uses spin_lock_irqsave() - replace spin_lock() to solve
this situation.
Signed-off-by: Yiwen Jiang <jiangyiwen@huawei.com>
Reviewed-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ocfs2/dlm/dlmcommon.h')
0 files changed, 0 insertions, 0 deletions