sched/fair: Add cgroup_mode: up

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Instead of calculating the proportional fraction of the group weight for each
CPU, just give each CPU the full measure, ignoring these pesky SMP problems.

This makes the SMP cgroup fraction (F_g_n) equal to 1, and ensures a single
task in a cgroup competes on equal footing to a task in a level above.

However, as already explored, this is not a very good policy because it gets
the SMP weight distribution wrong. Included for completeness.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://patch.msgid.link/20260605124051.450303977%40infradead.org

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Peter Zijlstra 2026-03-12 14:59:06 +01:00

parent 4161cb2d86

commit 80ad6d3338

3 changed files with 34 additions and 3 deletions

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5

kernel/sched/debug.c

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31

kernel/sched/fair.c

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1

kernel/sched/sched.h

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