render error beginning with kernel 2.6.38

[russellbell at gmail.com]

Beginning with kernel version 2.6.38 (and not 2.6.37.5), continuing to
3.1.8, at boot I get:

	kernel: render error detected, EIR: 0x00000010
	kernel:   IPEIR: 0x00000000
	kernel:   IPEHR: 0x00000000
	kernel:   INSTDONE: 0xfffffffe
	kernel:   INSTPS: 0x00000000
	kernel:   INSTDONE1: 0xffffffff
	kernel:   ACTHD: 0x00000000
	kernel: page table error
	kernel:   PGTBL_ER: 0x00000001
	kernel: [drm:i915_report_and_clear_eir] *ERROR* EIR stuck: 0x00000010, masking

It happened with no previous kernels (and still doesn't).  As near as
I can tell this causes no problem.  I'd like to know what it means.
I've diffed all the files in drivers/gpu/drm/i915 between versions
2.6.37.5 and 2.6.38.  If no one knows what this is about I would
appreciate information about how to narrow down what causes it.  For
instance, is it unlikely to be in the gem stuff?  The gem stuff is a
large portion of the difference.