3.9.0-rc7-next: i915: render error detected

[Chris Wilson]

On Fri, Apr 19, 2013 at 11:16:36AM +0200, Jiri Slaby wrote:
> Hi, with today's -next I got this:
> 
> [drm] capturing error event; look for more information in
> /sys/kernel/debug/dri/0/i915_error_state
> i915: render error detected, EIR: 0x00000010
> i915: page table error
> i915:   PGTBL_ER: 0x00000002
> [drm:i915_report_and_clear_eir] *ERROR* EIR stuck: 0x00000010, masking
> i915: render error detected, EIR: 0x00000010
> i915: page table error
> i915:   PGTBL_ER: 0x00000002

These feel like they are becoming more common, though we have had
reports of this style of error since the dawn of time. The error means
that the CPU accessed an invalid PTE - so the most likely a missing mb
or chipset flush.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre