Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
sched_ext: Add scx_enabled() test to @start_class promotion in put_prev_task_balance()
SCX needs its balance() invoked even when waking up from a lower priority
sched class (idle) and put_prev_task_balance() thus has the logic to promote
@start_class if it's lower than ext_sched_class. This is only needed when
SCX is enabled. Add scx_enabled() test to avoid unnecessary overhead when
SCX is disabled.
Signed-off-by: Tejun Heo <tj@kernel.org>
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Acked-by: David Vernet <void@manifault.com>
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kernel/sched/core.c
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kernel/sched/core.c
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* when waking up from SCHED_IDLE. If @start_class is below SCX, start
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* from SCX instead.
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*/
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-
if (sched_class_above(&ext_sched_class, start_class))
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if (scx_enabled() && sched_class_above(&ext_sched_class, start_class))
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start_class = &ext_sched_class;
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#endif
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