Messages in this thread | | | Date | Fri, 16 Jul 2010 11:25:19 -0700 | Subject | Re: [patch 2/2] x86 NMI-safe INT3 and Page Fault | From | Linus Torvalds <> |
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On Fri, Jul 16, 2010 at 11:15 AM, Avi Kivity <avi@redhat.com> wrote: > > I think the concern here is about an NMI handler's code running in vmalloc > space, or is it something else?
I think the concern was also potentially doing things like backtraces etc that may need access to the module data structures (I think the ELF headers end up all being in vmalloc space too, for example).
The whole debugging thing is also an issue. Now, I obviously am not a big fan of remote debuggers, but everybody tells me I'm wrong. And putting a breakpoint on NMI is certainly not insane if you are doing debugging in the first place. So it's not necessarily always about the page faults.
Linus
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