On Tue, 2013-02-19 at 00:43 +0100, Jiri Slaby wrote:
On 02/19/2013 12:23 AM, Marcin Slusarz wrote:
On Mon, Feb 18, 2013 at 11:27:43AM +0100, Jiri Slaby wrote:
Hi,
we have a report of WARNING from 3.7.6 in nouveau at drivers/gpu/drm/nouveau/core/core/mm.c:242 here: https://bugzilla.novell.com/show_bug.cgi?id=802347#c11
There is an order 4 allocation failure in nouveau_drm_open -> nouveau_vm_create, i.e. this one failed: vm->pgt = kcalloc(vm->lpde - vm->fpde + 1, sizeof(*vm->pgt), GFP_KERNEL);
Hi Jiri,
I had the order 4 allocation failure and nouveau crash back in November on next-20121129. Bugzillas here:
Allocation failure: https://bugzilla.kernel.org/show_bug.cgi?id=51301
Nouveau bug: https://bugzilla.kernel.org/show_bug.cgi?id=51291 https://bugs.freedesktop.org/show_bug.cgi?id=58087
IMO, the 32k allocation failure is the more serious bug. Check out the slab info from your report:
Feb 06 13:16:15 desdemona kernel: Node 0 DMA32: 13378*4kB 5026*8kB 1823*16kB 135*32kB 5*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 1*2048kB 0*4096kB = 129576kB Feb 06 13:16:15 desdemona kernel: Node 0 Normal: 1946*4kB 831*8kB 3*16kB 1*32kB 1*64kB 1*128kB 1*256kB 1*512kB 1*1024kB 0*2048kB 0*4096kB = 16496kB
The pages are there: why did the allocation fail?
I think this is related to all that kswapd mess. In my case, the machine really was OOM -- which made no sense. Completely out of page blocks larger than 32k on a 10gb machine with a bunch of emacs and terminal windows open for 3 days, just doing code, build, code, build, code, build?
Regards, Peter Hurley