From: Haifeng Xu haifeng.xu@shopee.com
mainline inclusion from mainline-v6.7-rc1 commit 0c2924079f5a83ed715630680e338b3685a0bf7d category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I8QUNW
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...
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We could bail out early when psi was disabled.
Signed-off-by: Haifeng Xu haifeng.xu@shopee.com Signed-off-by: Peter Zijlstra (Intel) peterz@infradead.org Reviewed-by: Chengming Zhou zhouchengming@bytedance.com Link: https://lore.kernel.org/r/20230926115722.467833-1-haifeng.xu@shopee.com Signed-off-by: Lu Jialin lujialin4@huawei.com --- kernel/sched/psi.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/kernel/sched/psi.c b/kernel/sched/psi.c index c972fb406e95..09bbcd246a5c 100644 --- a/kernel/sched/psi.c +++ b/kernel/sched/psi.c @@ -1024,6 +1024,9 @@ 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;