Am 26.09.22 um 15:37 schrieb Peter Zijlstra:
On Mon, Sep 26, 2022 at 03:23:10PM +0200, Christian Borntraeger wrote:
Am 26.09.22 um 14:55 schrieb Peter Zijlstra:
Could you please test with something like the below on? I can boot that
with KVM, but obviously I didn't suffer any weirdness to begin with :/
---
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 4e6a6417211f..ef9ccfc3a8c0 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -4051,6 +4051,8 @@ try_to_wake_up(struct task_struct *p, unsigned int state,
int wake_flags)
unsigned long flags;
int cpu, success = 0;
+ WARN_ON_ONCE(state & TASK_FREEZABLE);
+
preempt_disable();
if (p == current) {
/*
Does not seem to trigger.
Moo -- quite the puzzle this :/ I'll go stare at it more then.
In the end this is about the end of the sshd process (shutting it down).
I can also trigger the problem by sending a SIGTERM so its not about
the shutdown itself.
Pofiling the guest I see scheduler functions like sched_clock, pick_next_entity,
update_min_vruntime and so on with 100% system time.
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