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(parent: 399146b) | patch
MD: warn for potential deadlock
authorShaohua Li <shli@fb.com>
Thu, 25 Feb 2016 01:41:01 +0000 (17:41 -0800)
committerShaohua Li <shli@fb.com>
Fri, 26 Feb 2016 17:44:57 +0000 (09:44 -0800)
commit70d9798b95562abac005d4ba71d28820f9a201eb
tree4ab92bc060a79faa8363f29462cea00cbbddcf36tree | snapshot
parent399146b80ed6fb9f1ebe5a07234f00dff446d2b4commit | diff
MD: warn for potential deadlock

The personality thread shouldn't call mddev_suspend(). Because
mddev_suspend() will for all IO finish, but IO is handled in personality
thread, so this could cause deadlock. To trigger this early, add a
warning if mddev_suspend() is called from personality thread.

Suggested-by: NeilBrown <neilb@suse.com>
Cc: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Signed-off-by: Shaohua Li <shli@fb.com>
drivers/md/md.c diff | blob | history
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