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| author | Srinivas Eeda <srinivas.eeda@oracle.com> | 2012-01-30 21:51:22 -0800 |
|---|---|---|
| committer | Joel Becker <jlbec@evilplan.org> | 2012-07-03 23:27:15 -0700 |
| commit | a75e9ccabd925d16954739bd977c54695c9310d0 (patch) | |
| tree | f3f80253d2fbabdba0fbe35d48482d6a550ea030 /net/dccp | |
| parent | 16865b7c42fbce8a4d2b278460e387e719e289cb (diff) | |
| download | op-kernel-dev-a75e9ccabd925d16954739bd977c54695c9310d0.zip op-kernel-dev-a75e9ccabd925d16954739bd977c54695c9310d0.tar.gz | |
ocfs2: use spinlock irqsave for downconvert lock.patch
When ocfs2dc thread holds dc_task_lock spinlock and receives soft IRQ it
deadlock itself trying to get same spinlock in ocfs2_wake_downconvert_thread.
Below is the stack snippet.
The patch disables interrupts when acquiring dc_task_lock spinlock.
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_downconvert_thread
[kthread]
Signed-off-by: Srinivas Eeda <srinivas.eeda@oracle.com>
Signed-off-by: Joel Becker <jlbec@evilplan.org>
Diffstat (limited to 'net/dccp')
0 files changed, 0 insertions, 0 deletions
