On Wed, 25 Jun 2014, Christoph Lameter wrote: > On Wed, 25 Jun 2014, Sasha Levin wrote: > > > [ 791.669480] ? init_object (mm/slub.c:665) > > [ 791.669480] setup_object.isra.34 (mm/slub.c:1008 mm/slub.c:1373) > > [ 791.669480] new_slab (mm/slub.c:278 mm/slub.c:1412) > > So we just got a new page from the page allocator but somehow cannot > write to it. This is the first write access to the page. > I'd be inclined to think that this was a result of "slub: reduce duplicate creation on the first object" from -mm[*] that was added the day before Sasha reported the problem. It's not at all clear to me that that patch is correct. Wei? Sasha, with a revert of that patch, does this reproduce? [*] http://ozlabs.org/~akpm/mmotm/broken-out/slub-reduce-duplicate-creation-on-the-first-object.patch -- 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>