Re: [syzbot] [kvm?] WARNING: locking bug in kvm_xen_set_evtchn_fast
From: David Woodhouse
Date: Tue Nov 26 2024 - 09:50:50 EST
On Tue, 2024-11-26 at 06:24 -0800, syzbot wrote:
> syzbot has bisected this issue to:
>
> commit 560af5dc839eef08a273908f390cfefefb82aa04
> Author: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
> Date: Wed Oct 9 15:45:03 2024 +0000
>
> lockdep: Enable PROVE_RAW_LOCK_NESTING with PROVE_LOCKING.
That's not it; this has always been broken with PREEMPT_RT I think.
There was an attempt to fix it in
https://lore.kernel.org/all/20240227115648.3104-8-dwmw2@xxxxxxxxxxxxx/
I'll dust that off and try again.
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