Revision ac7cf246dfdbec3d8fed296c7bf30e16f5099dac authored by Joseph Qi on 25 March 2016, 21:21:26 UTC, committed by Linus Torvalds on 25 March 2016, 23:37:42 UTC
There is a race window between dlmconvert_remote and dlm_move_lockres_to_recovery_list, which will cause a lock with OCFS2_LOCK_BUSY in grant list, thus system hangs. dlmconvert_remote { spin_lock(&res->spinlock); list_move_tail(&lock->list, &res->converting); lock->convert_pending = 1; spin_unlock(&res->spinlock); status = dlm_send_remote_convert_request(); >>>>>> race window, master has queued ast and return DLM_NORMAL, and then down before sending ast. this node detects master down and calls dlm_move_lockres_to_recovery_list, which will revert the lock to grant list. Then OCFS2_LOCK_BUSY won't be cleared as new master won't send ast any more because it thinks already be authorized. spin_lock(&res->spinlock); lock->convert_pending = 0; if (status != DLM_NORMAL) dlm_revert_pending_convert(res, lock); spin_unlock(&res->spinlock); } In this case, check if res->state has DLM_LOCK_RES_RECOVERING bit set (res is still in recovering) or res master changed (new master has finished recovery), reset the status to DLM_RECOVERING, then it will retry convert. Signed-off-by: Joseph Qi <joseph.qi@huawei.com> Reported-by: Yiwen Jiang <jiangyiwen@huawei.com> Reviewed-by: Junxiao Bi <junxiao.bi@oracle.com> Cc: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Cc: Tariq Saeed <tariq.x.saeed@oracle.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>
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gameport | ||
joystick | ||
keyboard | ||
misc | ||
mouse | ||
rmi4 | ||
serio | ||
tablet | ||
touchscreen | ||
Kconfig | -rw-r--r-- | 6.0 KB |
Makefile | -rw-r--r-- | 909 bytes |
apm-power.c | -rw-r--r-- | 2.6 KB |
evbug.c | -rw-r--r-- | 3.1 KB |
evdev.c | -rw-r--r-- | 33.2 KB |
ff-core.c | -rw-r--r-- | 9.0 KB |
ff-memless.c | -rw-r--r-- | 14.4 KB |
input-compat.c | -rw-r--r-- | 3.3 KB |
input-compat.h | -rw-r--r-- | 1.7 KB |
input-leds.c | -rw-r--r-- | 5.2 KB |
input-mt.c | -rw-r--r-- | 12.2 KB |
input-polldev.c | -rw-r--r-- | 9.3 KB |
input.c | -rw-r--r-- | 60.1 KB |
joydev.c | -rw-r--r-- | 23.8 KB |
matrix-keymap.c | -rw-r--r-- | 5.6 KB |
mousedev.c | -rw-r--r-- | 26.1 KB |
sparse-keymap.c | -rw-r--r-- | 8.6 KB |
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