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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2017-02-02 13:27:21 +0000 |
|---|---|---|
| committer | Jani Nikula <jani.nikula@intel.com> | 2017-02-16 11:59:09 +0200 |
| commit | 2d2cfc12b1270c8451edc7d2dd5f79097b3a17d8 (patch) | |
| tree | 3a60359c14723dfd5999b86038bb1ce3af6c9fe4 /samples | |
| parent | 33b7bfdf918af4dc6585afe6d21f5e6b7613de1b (diff) | |
| download | op-kernel-dev-2d2cfc12b1270c8451edc7d2dd5f79097b3a17d8.zip op-kernel-dev-2d2cfc12b1270c8451edc7d2dd5f79097b3a17d8.tar.gz | |
drm/i915: Recreate internal objects with single page segments if dmar fails
If we fail to dma-map the object, the most common cause is lack of space
inside the SW-IOTLB due to fragmentation. If we recreate the_sg_table
using segments of PAGE_SIZE (and single page allocations), we may succeed
in remapping the scatterlist.
First became a significant problem for the mock selftests after commit
5584f1b1d73e ("drm/i915: fix i915 running as dom0 under Xen") increased
the max_order.
Fixes: 920cf4194954 ("drm/i915: Introduce an internal allocator for disposable private objects")
Fixes: 5584f1b1d73e ("drm/i915: fix i915 running as dom0 under Xen")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170202132721.12711-1-chris@chris-wilson.co.uk
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: <stable@vger.kernel.org> # v4.10
(cherry picked from commit bb96dcf5830e5d81a1da2e2a14e6c0f7dfc64348)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'samples')
0 files changed, 0 insertions, 0 deletions
