On 09/08/2014 01:18 PM, Mel Gorman wrote: > A worse possibility is that somehow the lock is getting corrupted but > that's also a tough sell considering that the locks should be allocated > from a dedicated cache. I guess I could try breaking that to allocate > one page per lock so DEBUG_PAGEALLOC triggers but I'm not very > optimistic. I did see ptl corruption couple days ago: https://lkml.org/lkml/2014/9/4/599 Could this be related? Thanks, Sasha -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>