On Mon, 6 Sep 2010, Dave Chinner wrote: > [ 596.628086] [<ffffffff81108a8c>] ? drain_all_pages+0x1c/0x20 > [ 596.628086] [<ffffffff81108fad>] ? __alloc_pages_nodemask+0x42d/0x700 > [ 596.628086] [<ffffffff8113d0f2>] ? kmem_getpages+0x62/0x160 > [ 596.628086] [<ffffffff8113dce6>] ? fallback_alloc+0x196/0x240 fallback_alloc() showing up here means that one page allocator call from SLAB has already failed. SLAB then did an expensive search through all object caches on all nodes to find some available object. There were no objects in queues at all therefore SLAB called the page allocator again (kmem_getpages()). As soon as memory is available (on any node or any cpu, they are all empty) SLAB will repopulate its queues(!). -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>