[Beignet] Haswell issues

[Zhigang Gong]

> -----Original Message-----
> From: Beignet [mailto:beignet-bounces at lists.freedesktop.org] On Behalf Of
> Rebecca N. Palmer
> Sent: Wednesday, April 29, 2015 8:13 PM
> To: beignet at lists.freedesktop.org
> Subject: Re: [Beignet] Haswell issues
> 
> > After revert the beignet's atomic in l3 patch [9e8874c ?], the
> i915.enable_ppgtt=2 should work for HSW platform.
> If it's that easy to really fix this, I agree we should do so; I'd taken the absence
> of anything other than "patch the kernel" in the documentation to mean that
> no other fix was known.
Ok, then I will revert that patch soon.

> 
> > Daniel already submitted a patchset to address part of this issue.
> http://lists.freedesktop.org/archives/intel-gfx/2015-April/064635.html ?
Exactly.
> 
> > could you help to identify the first kernel version which this enable_ppgtt=2
> works for beignet?
> Looks like
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=78a4
> 23772d08eb5a048765a883b5b5a308ea0d0f
> but I don't have the hardware to try it.
We will do some testing on this. And once we get the exact version, I will submit a
new patch to give some warn if the user is using an unsupported kernel. As now we
have better solution than patch kernel manually, I will change the document to suggest
user to upgrade to a supported kernel rather than patch kernel manually.

Thanks,
Zhigang Gong.

> 
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