Re: [RFC PATCH] x86 NMI-safe INT3 and Page Fault (v5)

[H. Peter Anvin]

Pavel Machek wrote:
> > There is also the page fault case. I think putting this test in
> > ret_from_exception would be both safe (it is executed for any
> > exception return) and fast (exceptions are rare).
>
> Eh? I thought that page fault is one of the hottest paths in kernel
> (along with syscall and packet receive/send)...
> 								Pavel

Yeah, and the concept of handling page faults inside an NMI handler is 
pure fantasy.

	-hpa
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