The following commit has been merged into the sched/core branch of tip: Commit-ID: 0c2924079f5a83ed715630680e338b3685a0bf7d Gitweb: https://git.kernel.org/tip/0c2924079f5a83ed715630680e338b3685a0bf7d Author: Haifeng Xu <haifeng.xu@xxxxxxxxxx> AuthorDate: Tue, 26 Sep 2023 11:57:22 Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx> CommitterDate: Fri, 13 Oct 2023 09:56:29 +02:00 sched/psi: Bail out early from irq time accounting We could bail out early when psi was disabled. Signed-off-by: Haifeng Xu <haifeng.xu@xxxxxxxxxx> Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Reviewed-by: Chengming Zhou <zhouchengming@xxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20230926115722.467833-1-haifeng.xu@xxxxxxxxxx --- kernel/sched/psi.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/kernel/sched/psi.c b/kernel/sched/psi.c index 44a7877..519bc92 100644 --- a/kernel/sched/psi.c +++ b/kernel/sched/psi.c @@ -998,6 +998,9 @@ void psi_account_irqtime(struct task_struct *task, u32 delta) struct psi_group_cpu *groupc; u64 now; + if (static_branch_likely(&psi_disabled)) + return; + if (!task->pid) return;
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