| commit | a09ba7faf75fa4b21980d81de8e5f3d5c0785ccf | [log] [tgz] |
|---|---|---|
| author | Eric Anholt <eric@anholt.net> | Sat Aug 29 12:49:51 2009 -0700 |
| committer | Eric Anholt <eric@anholt.net> | Sat Aug 29 17:37:21 2009 -0700 |
| tree | dd0e468fa4a1a287fc365dc5b4ce546b68234377 | |
| parent | f8aed700c6ec46ddade6570004ce25332283b306 [diff] |
drm/i915: Fix CPU-spinning hangs related to fence usage by using an LRU. The lack of a proper LRU was partially worked around by taking the fence from the object containing the oldest seqno. But if there are multiple objects inactive, then they don't have seqnos and the first fence reg among them would be chosen. If you were trying to copy data between two mappings, this could result in each page fault stealing the fence from the other argument, and your application hanging. https://bugs.freedesktop.org/show_bug.cgi?id=23566 https://bugs.freedesktop.org/show_bug.cgi?id=23220 https://bugs.freedesktop.org/show_bug.cgi?id=23253 https://bugs.freedesktop.org/show_bug.cgi?id=23366 Cc: Stable Team <stable@kernel.org> Signed-off-by: Eric Anholt <eric@anholt.net> Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>