Hi Peter,
On Tue, Jun 08, 2021 at 01:58:47PM +0200, Peter Zijlstra wrote:
> So #VC cannot happen with IRQs disabled?
>
> raw_spin_lock_irq(&my_lock);
> <#VC>
> raw_spin_lock_irqsave(&my_lock); // whoopsie
>
> Every exception that can happen with IRQs disabled must be NMI like.
>
> Again, what you seem to want is to split the handler in a from-user and
> from-kernel way, just like we did with #DB and MCE. See how
> exc_debug_user() is IRQ-like and can send signals, while
> exc_debug_kernel() is NMI like and can not.
You are right, thanks for pointing this out. I replaced that patch by
one implementing the split in a from-user and from-kernel part. Initial
testing looks good, will send it out later this week.
Thanks,
Joerg
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