[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 at 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 at amd.com> > Cc: "Christian König" <christian.koenig at amd.com> > Cc: David Airlie <airlied at linux.ie> > Signed-off-by: Michal Hocko <mhocko at suse.com> This one and patch #18 in this series are Reviewed-by: Christian König <christian.koenig at 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)
