diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2021-01-15 19:08:36 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-02-07 15:35:49 +0100 |
| commit | b1a1c262e4b0e713e52c63bd3233f1b9d6f2f056 (patch) | |
| tree | 7296c2ff957794eac56dca0edb301cb7f5d5f285 /block | |
| parent | 5b1e4fc2984eab30c5fffbf2bd1f016577cadab6 (diff) | |
workqueue: Restrict affinity change to rescuer
[ Upstream commit 640f17c82460e9724fd256f0a1f5d99e7ff0bda4 ]
create_worker() will already set the right affinity using
kthread_bind_mask(), this means only the rescuer will need to change
it's affinity.
Howveer, while in cpu-hot-unplug a regular task is not allowed to run
on online&&!active as it would be pushed away quite agressively. We
need KTHREAD_IS_PER_CPU to survive in that environment.
Therefore set the affinity after getting that magic flag.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Tested-by: Valentin Schneider <valentin.schneider@arm.com>
Link: https://lkml.kernel.org/r/20210121103506.826629830@infradead.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'block')
0 files changed, 0 insertions, 0 deletions