On 30 May 2006 21:14:54 +0200
Andi Kleen <[email protected]> wrote:
> Ingo Molnar <[email protected]> writes:
> >
> > The NMI watchdog uses spinlocks (notifier chains, etc.),
> > so it's not lockdep-safe at the moment.
>
> That's totally unsafe even without lockdep and should be fixed
> instead. I guess someone bungled the notifier chain conversion.
> The NMI notifiers need to be lockless.
>
Confused. NMI uses notify_die(), which doesn't take locks?
We'll probably accidentally take locks when actually reporting an NMI
watchdog timeout, but that doesn't seem terribly important.
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- References:
- 2.6.17-rc5-mm1
- [patch, -rc5-mm1] lock validator, fix NULL type->name bug
- Re: [patch, -rc5-mm1] lock validator, fix NULL type->name bug
- Re: [patch, -rc5-mm1] lock validator, fix NULL type->name bug
- Re: [patch, -rc5-mm1] lock validator, fix NULL type->name bug
- Re: [patch, -rc5-mm1] lock validator, fix NULL type->name bug
- Re: [patch, -rc5-mm1] lock validator, fix NULL type->name bug
- Re: [patch, -rc5-mm1] lock validator, fix NULL type->name bug
- [patch, -rc5-mm1] lock validator: disable NMI watchdog if CONFIG_LOCKDEP, i386
- Re: [patch, -rc5-mm1] lock validator: disable NMI watchdog if CONFIG_LOCKDEP, i386
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