sched_ext: Assign a unique id to each scheduler instance

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Neither a scx_sched pointer nor its cgroup id uniquely identifies a
scheduler instance. A freed sched's memory can be reallocated, and a cgroup
can detach one sched and attach another. Add a monotonic, never-reused u64
id. A later patch compares it to drop a slice request that outlived a change
of a task's owning scheduler.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reviewed-by: Andrea Righi <arighi@nvidia.com>

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Tejun Heo 2026-07-13 22:18:43 -10:00

parent 147d1885f3

commit 61d564fcdf

2 changed files with 7 additions and 0 deletions

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4

kernel/sched/ext/ext.c

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3

kernel/sched/ext/internal.h

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