Re: [i915] BUG: Bad page state in process Xorg

[Thomas Meyer <thomas@m3y3r.de>]

Am Montag, den 25.11.2013, 08:23 -0500 schrieb Rob Clark:
> oh, hmm.. are you importing buffers from i915?  It looks like this part:

My computer has an i915 graphic card and I use an USB docking station,
that has an unconnected UDL device inside.

> 
> - if (obj->base.import_attach) {
> - drm_free_large(obj->pages);
> - obj->pages = NULL;
> - return;
> - }
> 
> should not have been removed from udl_gem_put_pages()..

Do you want me to test this? Can this please be fixed in the stable
tree?
I removed the UDL driver from my config for now, as I don't use it.
      * 
best regards
thomas

> 
> BR,
> -R
> 
> On Mon, Nov 25, 2013 at 8:17 AM,  <thomas@m3y3r.de> wrote:
> > Hi,
> >
> > It turns out that this seems to be a bug in udl DRM driver.
> >
> > I bisected the problem to this patch:
> >
> > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/gpu/drm/udl?id=5dc9e1e87229cb786a5bb58ddd0d60fee6eb4641
> >
> > With kind regards
> > Thomas
> >
> > Am 22.11.2013 17:18 schrieb Daniel Vetter <daniel@ffwll.ch>:
> >>
> >> On Fri, Nov 22, 2013 at 4:54 PM, Thomas Meyer <thomas@m3y3r.de> wrote:
> >> >> Am 22.11.2013 um 11:55 schrieb Daniel Vetter <daniel@ffwll.ch>:
> >> >>
> >> >> On Fri, Nov 22, 2013 at 11:36 AM, Dave Airlie <airlied@linux.ie> wrote:
> >> >>>> Hi,
> >> >>>
> >> >>> cc'ing mailing list,
> >> >>>
> >> >>> Daniel any ideas?
> >> >>
> >> >> Nope, not really :( And no ideas how to triage this further - if it
> >> >> takes 9 days to hit it eventually we'll have a real hard time. Or does
> >> >> this happen even after just a short X run?
> >> >
> >> > Seems to happen every time while stopping the x server. Also after a short run time.
> >> >
> >> > The current fedora 3.11 kernel doesn't show this bug. I'm using fedora 19, with a self compiled kernel.
> >> >
> >> > I did turn on config-debug-pagealloc but this didn't show any wrongness.
> >>
> >> In that case I think the bisect is the fastest way to insight - atm
> >> I'm really at loss what could be wrong here.
> >> -Daniel
> >> --
> >> Daniel Vetter
> >> Software Engineer, Intel Corporation
> >> +41 (0) 79 365 57 48 - http://blog.ffwll.ch