On Tue, Feb 19, 2013 at 12:43:06AM +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); > >> > >> Then, on the error path in still in nouveau_drm_open, it is followed by > >> a call to nouveau_cli_destroy. But that one calls nouveau_vm_ref -> > >> nouveau_mm_fini -> nouveau_vm_del -> nouveau_mm_fini which triggers the > >> warning. > >> > >> Any ideas? > > > > Crash/warning should be fixed by commit cfd376b6bfccf33782a0748a9c70f7f752f8b869 > > "drm/nouveau/vm: fix memory corruption when pgt allocation fails". > > Oh, thanks for the pointer. Could that bug cause real "memory > corruption"? As we're hunting one there... Yes. > Isn't this a stable-3.7 candidate? Should have been :/. > > Tomorrow I'll post a patch for page allocation failure. > > What do you mean -- what kind of patch? A patch which will change pgt allocation to use vmalloc. Marcin _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/dri-devel
