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| author | Joseph Qi <joseph.qi@huawei.com> | 2015-09-22 14:59:20 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-09-22 15:09:53 -0700 |
| commit | 012572d4fc2e4ddd5c8ec8614d51414ec6cae02a (patch) | |
| tree | ce5b9dc95ea8f3e9ea4a84d6b87cce8d0777e94b /include | |
| parent | 7a07b503bf249986a1eeef0351d66cac0d8bf721 (diff) | |
| download | linux-stable-012572d4fc2e4ddd5c8ec8614d51414ec6cae02a.tar.gz linux-stable-012572d4fc2e4ddd5c8ec8614d51414ec6cae02a.tar.bz2 linux-stable-012572d4fc2e4ddd5c8ec8614d51414ec6cae02a.zip | |
ocfs2/dlm: fix deadlock when dispatch assert master
The order of the following three spinlocks should be:
dlm_domain_lock < dlm_ctxt->spinlock < dlm_lock_resource->spinlock
But dlm_dispatch_assert_master() is called while holding
dlm_ctxt->spinlock and dlm_lock_resource->spinlock, and then it calls
dlm_grab() which will take dlm_domain_lock.
Once another thread (for example, dlm_query_join_handler) has already
taken dlm_domain_lock, and tries to take dlm_ctxt->spinlock deadlock
happens.
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: "Junxiao Bi" <junxiao.bi@oracle.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions