Quoting Ville Syrjälä (2020-10-08 11:04:22) > On Thu, Oct 08, 2020 at 10:54:36AM +0100, Chris Wilson wrote: > > The GPU is trashing the low pages of its reserved memory upon reset. If > > we are using this memory for ringbuffers, then we will dutiful resubmit > > the trashed rings after the reset causing further resets, and worse. We > > must exclude this range from our own use. The value of 128KiB was found > > by empirical measurement on gen9. > > > > Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> > > Cc: stable@xxxxxxxxxxxxxxx > > --- > > v2 comes with a selftest to see how widespread the issue is > > Do we need something to make sure FBC isn't scribbling into > stolen during the test? igt runs the tests with disable_display=1, that is still being honoured right? I did think about looking up the address to see if the drm_mm_node is in use to try and filter out such users. For starters, I just want to confirm that CI is seeing what I'm seeing. -Chris _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
