drm-next i915 regression? ( was: Re: PCI resources above 4GB)

Steven Newbury steve at snewbury.org.uk
Fri Apr 13 07:19:58 PDT 2012

Hash: SHA1

On 13/04/12 15:13, Daniel Vetter wrote:
> On Fri, Apr 13, 2012 at 03:08:36PM +0100, Steven Newbury wrote:
>> On 13/04/12 14:52, Steven Newbury wrote:
>>> On Fri, 13 Apr 2012, 14:26:19 BST, Steven Newbury 
>>> <steve at snewbury.org.uk> wrote:
>>>> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1
>>>> On 13/04/12 13:49, Steven Newbury wrote:
>>>>> On 13/04/12 12:58, Steven Newbury wrote:
>>>>>>> It's not stable, crashes soon after GMA comes up.
>>>>>>> (Could be unrelated breakage in linus/master? Probably
>>>>>>> not but I will verify.)   I noticed the high
>>>>>>> allocations are occuring from the top of 64-bit
>>>>>>> address-space, whilst /proc/cpuinfo shows only 48 bits
>>>>>>> of virtual addressing.   Could that be why..?
>>>>>> To reply to myself again, I should have said crashes
>>>>>> shortly after Xorg initialises using the intel driver, in
>>>>>> both cases! I'm building a kernel now without the patch
>>>>>> set to see if it's unrelated.   If it still dies I'll try
>>>>>> applying your patch set to a branch without the changes
>>>>>> from linus/master... (should have done that anyway...)
>>>>> Okay, I instead created a branch from an older 3.4-rc1+
>>>>> kernel tree, running it now, and it seems to be stable.
>>>>> Something perhaps in the newer tree not playing nicely.
>>>>> I'll see if I can bisect it, or at least base of rc2 if
>>>>> that works... (I'm a little wary of crashing the system too
>>>>> much and losing my btrfs filesystem...)
>>>> rc2 is fine as well.   Not sure what happened there, I need
>>>> to be more careful about keeping a clean tree to work from.
>>> I'm pretty sure the crash was a from a drm-next regression.
>>> I'll try bisecting it....
>> Sorry, posted too soon!  Almost as I clicked on send it froze
>> again (using rc2 + for-pci-res-alloc ).  I had problems with the
>> earlier patches re. X/i915 stability.  Strange.  I'll see if I
>> can track it down.
> Please upgrade to the latest version of Linus' upstream git. A few
> fixes for regressions in drm/i915 just landed there for -rc3. 
> -Daniel

Okay.  I'll try clean latest linus + for-pci-res-alloc.  Will report back.

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