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

[Steven Newbury]

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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:
> 
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>> 
>> 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.
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