On Mon, Aug 19, 2013 at 12:35 AM, Ben Widawsky <ben@xxxxxxxxxxxx> wrote: > On Sun, Aug 18, 2013 at 07:26:57PM +0200, Daniel Vetter wrote: >> On Fri, Aug 16, 2013 at 11:31:12PM +0100, Chris Wilson wrote: >> > On Fri, Aug 16, 2013 at 01:29:33PM -0700, Ben Widawsky wrote: >> > > The vma will [possibly] be destroyed during unbind in eviction. >> > > Immediately after this, we try to delete the list entry. >> > > >> > > Chris and Ville did the debug on this before I woke up, I just get to >> > > take credit for the fix :p >> > > >> > > v2: Missed the drm_object_unreference use after free (Ville) >> > > >> > > Reported-by: Mika Kuoppala <mika.kuoppala@xxxxxxxxx> >> > > Cc: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> >> > > Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> >> > > Signed-off-by: Ben Widawsky <ben@xxxxxxxxxxxx> >> >> Since the commit message lacks that crucial piece of information: How was >> this discovered? I use that to tune my gut feeling for gauging the >> -nightly test effectiveness ... > > Mika pasted an oops on #intel-gfx. Chris and Ville had is solved before > I woke up. It's pretty strange, Chris said the bug existed in the > original ppgtt2 branch (I'm too lazy to check). In many runs for myself, > and QA, I'd not seen the oops though. I really can't explain it. Thanks for the explanation. Please add such information (including the full Oops) to the commit message next time around. I've asked Mika for the backtrace meanwhile. I guess this is another candidate for a testcase - if you and QA have beat on this for a while and couldn't hit this bug we need to try harder to hit bugs ;-) -Daniel -- Daniel Vetter Software Engineer, Intel Corporation +41 (0) 79 365 57 48 - http://blog.ffwll.ch _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
