ocfs2/dlm: clear migration_pending when migration target goes down
We have found a BUG on res->migration_pending when migrating lock resources. The situation is as follows. dlm_mark_lockres_migration res->migration_pending = 1; __dlm_lockres_reserve_ast dlm_lockres_release_ast returns with res->migration_pending remains because other threads reserve asts wait dlm_migration_can_proceed returns 1 >>>>>>> o2hb found that target goes down and remove target from domain_map dlm_migration_can_proceed returns 1 dlm_mark_lockres_migrating returns -ESHOTDOWN with res->migration_pending still remains. When reentering dlm_mark_lockres_migrating(), it will trigger the BUG_ON with res->migration_pending. So clear migration_pending when target is down. Signed-off-by:Jiufei Xue <xuejiufei@huawei.com> Reviewed-by:
Joseph Qi <joseph.qi@huawei.com> Cc: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> 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>
parent
5f0f2887
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