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

[Daniel Vetter]

On Fri, Apr 13, 2012 at 03:08:36PM +0100, Steven Newbury wrote:
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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.

Please upgrade to the latest version of Linus' upstream git. A few fixes
for regressions in drm/i915 just landed there for -rc3.
-Daniel
-- 
Daniel Vetter
Mail: daniel at ffwll.ch
Mobile: +41 (0)79 365 57 48