Joseph Qi f5499bfc0b ocfs2/dlm: fix deadlock when dispatch assert master ... commit 012572d4fc2e4ddd5c8ec8614d51414ec6cae02a upstream. 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> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> [lizf: Backported to 3.4: adjust context] Signed-off-by: Zefan Li <lizefan@huawei.com>		2016-04-27 18:55:24 +08:00
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dlmapi.h
dlmast.c
dlmcommon.h
dlmconvert.c
dlmconvert.h
dlmdebug.c
dlmdebug.h
dlmdomain.c
dlmdomain.h
dlmlock.c
dlmmaster.c	ocfs2/dlm: fix deadlock when dispatch assert master	2016-04-27 18:55:24 +08:00
dlmrecovery.c	ocfs2/dlm: fix deadlock when dispatch assert master	2016-04-27 18:55:24 +08:00
dlmthread.c
dlmunlock.c
dlmver.c
dlmver.h
Makefile