The patch titled
Subject: drm/radeon: make radeon_mn_get wait for mmap_sem killable
has been removed from the -mm tree. Its filename was
drm-radeon-make-radeon_mn_get-wait-for-mmap_sem-killable.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Michal Hocko <mhocko@xxxxxxxx>
Subject: drm/radeon: make radeon_mn_get wait for mmap_sem killable
radeon_mn_get which is called during ioct path relies on mmap_sem for
write. If the waiting task gets killed by the oom killer it would block
oom_reaper from asynchronous address space reclaim and reduce the chances
of timely OOM resolving. Wait for the lock in the killable mode and
return with EINTR if the task got killed while waiting.
Signed-off-by: Michal Hocko <mhocko@xxxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: David Airlie <airlied@xxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/radeon/radeon_mn.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff -puN drivers/gpu/drm/radeon/radeon_mn.c~drm-radeon-make-radeon_mn_get-wait-for-mmap_sem-killable drivers/gpu/drm/radeon/radeon_mn.c
--- a/drivers/gpu/drm/radeon/radeon_mn.c~drm-radeon-make-radeon_mn_get-wait-for-mmap_sem-killable
+++ a/drivers/gpu/drm/radeon/radeon_mn.c
@@ -186,7 +186,9 @@ static struct radeon_mn *radeon_mn_get(s
struct radeon_mn *rmn;
int r;
- down_write(&mm->mmap_sem);
+ if (down_write_killable(&mm->mmap_sem))
+ return ERR_PTR(-EINTR);
+
mutex_lock(&rdev->mn_lock);
hash_for_each_possible(rdev->mn_hash, rmn, node, (unsigned long)mm)
_
Patches currently in -mm which might be from mhocko@xxxxxxxx are
oom_reaper-close-race-with-exiting-task.patch
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