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