[Dropping CCing the individual people, but adding the dri-devel mailing list as well instead].

Am 29.02.2016 um 14:26 schrieb Michal Hocko:

From: Michal Hocko mhocko@suse.com

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.

Cc: Alex Deucher alexander.deucher@amd.com Cc: "Christian König" christian.koenig@amd.com Cc: David Airlie airlied@linux.ie Signed-off-by: Michal Hocko mhocko@suse.com

This one and patch #18 in this series are Reviewed-by: Christian König christian.koenig@amd.com.

Nice to see some improvements on this side, Christian.

---

drivers/gpu/drm/radeon/radeon_mn.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/radeon/radeon_mn.c b/drivers/gpu/drm/radeon/radeon_mn.c index eef006c48584..896f2cf51e4e 100644 --- a/drivers/gpu/drm/radeon/radeon_mn.c +++ b/drivers/gpu/drm/radeon/radeon_mn.c @@ -186,7 +186,9 @@ static struct radeon_mn *radeon_mn_get(struct radeon_device *rdev) 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)