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author | Qais Yousef <qais.yousef@arm.com> | 2020-03-02 13:27:20 +0000 |
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committer | Ingo Molnar <mingo@kernel.org> | 2020-03-06 12:57:29 +0100 |
commit | d94a9df49069ba8ff7c4aaeca1229e6471a01a15 (patch) | |
tree | e0a26defbc73d537e6835649b01585520cdeb568 /Documentation/driver-api/pps.rst | |
parent | 98ca645f824301bde72e0a51cdc8bdbbea6774a5 (diff) |
sched/rt: Remove unnecessary push for unfit tasks
In task_woken_rt() and switched_to_rto() we try trigger push-pull if the
task is unfit.
But the logic is found lacking because if the task was the only one
running on the CPU, then rt_rq is not in overloaded state and won't
trigger a push.
The necessity of this logic was under a debate as well, a summary of
the discussion can be found in the following thread:
https://lore.kernel.org/lkml/20200226160247.iqvdakiqbakk2llz@e107158-lin.cambridge.arm.com/
Remove the logic for now until a better approach is agreed upon.
Signed-off-by: Qais Yousef <qais.yousef@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Fixes: 804d402fb6f6 ("sched/rt: Make RT capacity-aware")
Link: https://lkml.kernel.org/r/20200302132721.8353-6-qais.yousef@arm.com
Diffstat (limited to 'Documentation/driver-api/pps.rst')
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