On Mon, Sep 21, 2015 at 08:09:54PM +0900, Tetsuo Handa wrote: > This is a difficult-to-trigger silent hang up bug. > > The kswapd is allowed to bypass too_many_isolated() check in > shrink_inactive_list(). But the kswapd can be blocked by locks in > shrink_page_list() in shrink_inactive_list(). If the task which is > blocking the kswapd is trying to allocate memory with the locks held, > it forms memory reclaim deadlock. It's a known problem in XFS and I'm currently working on patches to fix it by hoisting the memory allocations outside of the CIL context lock. Cheers, Dave. -- Dave Chinner david@xxxxxxxxxxxxx _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
