i915 modeset memory corruption issues? (Fwd: Oops in ext3_block_to_path.isra.40+0x26/0x11b)

[Dave Airlie]

On Fri, Mar 16, 2012 at 11:01 PM, Keith Packard <keithp at keithp.com> wrote:
> <#part sign=pgpmime>
> On Fri, 16 Mar 2012 16:47:46 +0000, Dave Airlie <airlied at gmail.com> wrote:
>
>> The hibernate issue is known and I've been hoping someone from Intel
>> would run with debugging it, they have a big enough team that I don't
>> feel I can expend the personal time to look into it.
>
> Yeah, I've been chatting with a couple of intel folks; we should have a
> test patch ready shortly, but we haven't been able to reproduce anything
> like this...
>
>> Maybe Keith can push someone or maybe I just refuse pull requests
>> until one with a fix appears.
>
> From what I've seen, this is a problem only on Ironlake machines, which
> makes me afraid of some weird GTT flushing issue, given the adventures
> we had with VT-d on that hardware where we idle the gpu before any GTT
> updates. I wonder what would happen if we idled the GPU before any GTT
> updates even when VT-d wasn't running...

We've had reports on 965GM in Fedora, maybe davej has the specific bug.

Dave.