[Intel-gfx] [PATCH] drm/i915: Use the right mapping_gfp_mask for final shmem allocation

[Chris Wilson]

Many sightings report the greater prevalence of allocation failures.
This is all due to the incorrect use of mapping_gfp_constraint(), so
remove it in favour of just querying the mapping_gfp_mask() which are
the exact gfp_t we wanted in the first place.

We still do expect a higher chance of reporting ENOMEM, as that is the
intention of using __GFP_NORETRY -- to fail rather than oom after having
reclaimed from our bo caches, and having done a direct|kswapd reclaim
pass.

Reported-by: Jason Ekstrand <jason.ekstrand at intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100594
Fixes: 24f8e00a8a2e ("drm/i915: Prefer to report ENOMEM rather than incur the oom for gfx allocations")
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
---
 drivers/gpu/drm/i915/i915_gem.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 5f911a25e99a..57f51f1dac69 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2314,7 +2314,7 @@ i915_gem_object_get_pages_gtt(struct drm_i915_gem_object *obj)
 			 * defer the oom here by reporting the ENOMEM back
 			 * to userspace.
 			 */
-			reclaim = mapping_gfp_constraint(mapping, 0);
+			reclaim = mapping_gfp_mask(mapping);
 			reclaim |= __GFP_NORETRY; /* reclaim, but no oom */
 
 			page = shmem_read_mapping_page_gfp(mapping, i, reclaim);
-- 
2.11.0