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author | Thomas Hellstrom <thellstrom@vmware.com> | 2012-10-22 12:51:26 +0000 |
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committer | Dave Airlie <airlied@redhat.com> | 2012-10-23 10:15:21 +1000 |
commit | b8e902f24fdd16c4373ddc37a4e150c4afe9c6db (patch) | |
tree | e17556304d126329c63af9367432fe796294d08a /mm/quicklist.c | |
parent | 7bc17a7837bf4ec8fd2d63438c0b6b0160c454c1 (diff) | |
download | op-kernel-dev-b8e902f24fdd16c4373ddc37a4e150c4afe9c6db.zip op-kernel-dev-b8e902f24fdd16c4373ddc37a4e150c4afe9c6db.tar.gz |
drm/ttm: Fix a theoretical race in ttm_bo_cleanup_refs()
In theory, that function could release the lru lock between
checking for bo on ddestroy list and a successful reserve if the bo
was already reserved, and the function was called with waiting reserves
allowed.
However, all current reservers of a bo on the ddestroy list would
atomically take the bo off the list after a successful reserve so this
race should not have been hit, so no need to backport for stable.
This patch also fixes a case found by Maarten Lankhorst where
ttm_mem_evict_first called with no_wait_gpu would incorrectly
spin waiting for bo idle if trying to evict a busy buffer that
also sits on the ddestroy list.
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'mm/quicklist.c')
0 files changed, 0 insertions, 0 deletions