diff options
| author | Frederic Weisbecker <[email protected]> | 2021-05-27 13:34:41 +0200 |
|---|---|---|
| committer | Peter Zijlstra <[email protected]> | 2021-05-31 10:14:49 +0200 |
| commit | f268c3737ecaefcfeecfb4cb5e44958a8976f067 (patch) | |
| tree | 895c3ffc8d716b3d00851b569eb183f73a95d9fc /drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | |
| parent | 02da26ad5ed6ea8680e5d01f20661439611ed776 (diff) | |
tick/nohz: Only check for RCU deferred wakeup on user/guest entry when needed
Checking for and processing RCU-nocb deferred wakeup upon user/guest
entry is only relevant when nohz_full runs on the local CPU, otherwise
the periodic tick should take care of it.
Make sure we don't needlessly pollute these fast-paths as a -3%
performance regression on a will-it-scale.per_process_ops has been
reported so far.
Fixes: 47b8ff194c1f (entry: Explicitly flush pending rcuog wakeup before last rescheduling point)
Fixes: 4ae7dc97f726 (entry/kvm: Explicitly flush pending rcuog wakeup before last rescheduling point)
Reported-by: kernel test robot <[email protected]>
Signed-off-by: Frederic Weisbecker <[email protected]>
Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Reviewed-by: Paul E. McKenney <[email protected]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/[email protected]
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_device.c')
0 files changed, 0 insertions, 0 deletions