mirror of https://gitee.com/openkylin/linux.git
ac4fef4d23
When workqueue is delayed, it may occur that a lockres is purged while it is still queued for master assert. it may trigger BUG() as follows. N1 N2 dlm_get_lockres() ->dlm_do_master_requery is the master of lockres, so queue assert_master work dlm_thread() start running and purge the lockres dlm_assert_master_worker() send assert master message to other nodes receiving the assert_master message, set master to N2 dlmlock_remote() send create_lock message to N2, but receive DLM_IVLOCKID, if it is RECOVERY lockres, it triggers the BUG(). Another BUG() is triggered when N3 become the new master and send assert_master to N1, N1 will trigger the BUG() because owner doesn't match. So we should not purge lockres when it is queued for assert master. Signed-off-by: joyce.xue <xuejiufei@huawei.com> Reviewed-by: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
||
---|---|---|
.. | ||
Makefile | ||
dlmapi.h | ||
dlmast.c | ||
dlmcommon.h | ||
dlmconvert.c | ||
dlmconvert.h | ||
dlmdebug.c | ||
dlmdebug.h | ||
dlmdomain.c | ||
dlmdomain.h | ||
dlmlock.c | ||
dlmmaster.c | ||
dlmrecovery.c | ||
dlmthread.c | ||
dlmunlock.c |