[Intel-gfx] [PATCH] drm/i915: Force relocations via cpu if we run out of idle aperture

[Joonas Lahtinen]

On to, 2016-10-06 at 08:41 +0100, Chris Wilson wrote:
> If we run out of enough aperture space to fit the entire object, we
> fallback to trying to insert a single page. However, if that also fails,
> we currently fail to userspace with an unexpected ENOSPC. (ENOSPC means
> to userspace that their batch could not be fitted within the GTT.) Prior
> to commit e8cb909ac3ab ("drm/i915: Fallback to single page GTT
> mmappings for relocations") the approach is to fallback to using the
> slow CPU relocation path in case of iomapping failure, and that is the
> behaviour we need to restore.
> 
> Fixes: e8cb909ac3ab ("drm/i915: Fallback to single page GTT mmappings...")
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=98101
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>

Reviewed-by: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>

Regards, Joonas
-- 
Joonas Lahtinen
Open Source Technology Center
Intel Corporation