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| author | Dominik Dingel <[email protected]> | 2015-09-18 09:27:45 +0000 |
|---|---|---|
| committer | Paolo Bonzini <[email protected]> | 2015-09-18 11:47:59 +0000 |
| commit | 00cc1633816de8c95f337608a1ea64e228faf771 (patch) | |
| tree | e2d7d478433a78a135df3aa575cfad98a34c950a /drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c | |
| parent | Merge tag 'kvm-arm-for-4.3-rc2-2' of git://git.kernel.org/pub/scm/linux/kerne... (diff) | |
| download | kernel-00cc1633816de8c95f337608a1ea64e228faf771.tar.gz kernel-00cc1633816de8c95f337608a1ea64e228faf771.zip | |
sched: access local runqueue directly in single_task_running
Commit 2ee507c47293 ("sched: Add function single_task_running to let a task
check if it is the only task running on a cpu") referenced the current
runqueue with the smp_processor_id. When CONFIG_DEBUG_PREEMPT is enabled,
that is only allowed if preemption is disabled or the currrent task is
bound to the local cpu (e.g. kernel worker).
With commit f78195129963 ("kvm: add halt_poll_ns module parameter") KVM
calls single_task_running. If CONFIG_DEBUG_PREEMPT is enabled that
generates a lot of kernel messages.
To avoid adding preemption in that cases, as it would limit the usefulness,
we change single_task_running to access directly the cpu local runqueue.
Cc: Tim Chen <[email protected]>
Suggested-by: Peter Zijlstra <[email protected]>
Acked-by: Peter Zijlstra (Intel) <[email protected]>
Cc: <[email protected]>
Fixes: 2ee507c472939db4b146d545352b8a7c79ef47f8
Signed-off-by: Dominik Dingel <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c')
0 files changed, 0 insertions, 0 deletions