[Bug 99295] [Regression BDW] kernel panic in Intel i915 module, complete system freeze in 4.10-rc2

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=99295

--- Comment #47 from Daniel Vetter <daniel at ffwll.ch> ---
(In reply to Helio Loureiro from comment #46)
> (In reply to Chris Wilson from comment #22)
> > Or less broken:
> > 
> > diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c
> > b/drivers/gpu/drm/i915/i915_gem_gtt.c
> > index b4bde1452f2a..be75ab6a8ed6 100644
> > --- a/drivers/gpu/drm/i915/i915_gem_gtt.c
> > +++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
> > @@ -33,7 +33,7 @@
> >  #include "intel_drv.h"
> >  #include "intel_frontbuffer.h"
> >  
> > -#define I915_GFP_DMA (GFP_KERNEL | __GFP_HIGHMEM)
> > +#define I915_GFP_DMA ((GFP_KERNEL | __GFP_HIGHMEM) & ~__GFP_RECLAIM)
> >  
> >  /**
> >   * DOC: Global GTT views
> 
> Hi,
> 
> I applied such patch on top of 4.11.2.  It apparently caught the bug and
> didn't crash the usage.

This patch is already rejected for backporting, testing it doesn't move this
bug foward. Please instead test Chris' latest patch (and only that, no other
hacks/backports applied please) attachment #2.

> I just noticed the kernel log after checking w/ journalctl.

This is just an OOM report (with a few lines missing at the beginning), which
is somewhat expected with Chris' patch. It explains why kwin dies in execbuf
with "out of memory" at least".
-Daniel

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