On Thu, Jan 12, 2017 at 07:03:25AM +0100, Juergen Gross wrote: > On 11/01/17 18:08, Chris Wilson wrote: > > On Wed, Jan 11, 2017 at 05:33:34PM +0100, Juergen Gross wrote: > >> With kernel 4.10rc3 running as Xen dm0 I get at each boot: > >> > >> [ 49.213697] [drm] GPU HANG: ecode 7:0:0x3d1d3d3d, in gnome-shell > >> [1431], reason: Hang on render ring, action: reset > >> [ 49.213699] [drm] GPU hangs can indicate a bug anywhere in the entire > >> gfx stack, including userspace. > >> [ 49.213700] [drm] Please file a _new_ bug report on > >> bugs.freedesktop.org against DRI -> DRM/Intel > >> [ 49.213700] [drm] drm/i915 developers can then reassign to the right > >> component if it's not a kernel issue. > >> [ 49.213700] [drm] The gpu crash dump is required to analyze gpu > >> hangs, so please always attach it. > >> [ 49.213701] [drm] GPU crash dump saved to /sys/class/drm/card0/error > >> [ 49.213755] drm/i915: Resetting chip after gpu hang > >> [ 60.213769] drm/i915: Resetting chip after gpu hang > >> [ 71.189737] drm/i915: Resetting chip after gpu hang > >> [ 82.165747] drm/i915: Resetting chip after gpu hang > >> [ 93.205727] drm/i915: Resetting chip after gpu hang > >> > >> The dump is attached. > > > > That's a nasty one. The first couple of pages of the batchbuffer appear > > to be overwritten. (Full of 0xc2c2c2c2, i.e. probably pixel data.) That > > may be a concurrent write by either the GPU or CPU, or we may have > > incorrected mapped a set of pages. That it doesn't recovered suggests > > that the corruption occurs frequently, probably on every request/batch. > > I hoped someone would have an idea already. Sorry, first report of something like this in a long time (that I can remember at least). And the problem is that it can be anything from a coherency to a concurrency issue, so no one patch springs to mind. Thankfully it appears to be kernel related. -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
