Messages in this thread | | | Date | Mon, 4 Aug 2008 23:36:25 +0900 | From | "MinChan Kim" <> | Subject | Race condition between putback_lru_page and mem_cgroup_move_list |
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I think this is a race condition if mem_cgroup_move_lists's comment isn't right. I am not sure that it was already known problem.
mem_cgroup_move_lists assume the appropriate zone's lru lock is already held. but putback_lru_page calls mem_cgroup_move_lists without holding lru_lock.
Repeatedly, spin_[un/lock]_irq use in mem_cgroup_move_list have a big overhead while doing list iteration.
Do we have to use pagevec ?
-- Kinds regards, MinChan Kim
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