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Re: [PATCH] i386: improve double fault handling
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From: Ingo Molnar
Subject:
Re: [PATCH] i386: improve double fault handling
Date: Thursday, July 31, 2008 - 3:46 am
* Chuck Ebbert <cebbert@redhat.com> wrote:
quoted text
> Ingo Molnar wrote: >> >> All CPUs hitting a double fault simultaneously and corrupting each >> others' kernel stack is a theoretical possibility - but is handling it >> worth the complexity? It appears to me that a lock plus a short stub >> function that takes the lock (with no stack usage) would handle that >> much better. > > That can't happen now because the TSS gets marked busy so we will get > a triple fault instead. One thing we might want to do in the current > code is unset the busy flag after handling the fault and before we > start looping at the end of the handler so we can handle another fault > later.
that would be a nice improvement. Ingo --
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Messages in current thread:
[PATCH] i386: improve double fault handling
, Jan Beulich
, (Fri Jul 18, 5:30 am)
Re: [PATCH] i386: improve double fault handling
, H. Peter Anvin
, (Fri Jul 18, 4:24 pm)
Re: [PATCH] i386: improve double fault handling
, Jan Beulich
, (Mon Jul 21, 1:54 am)
Re: [PATCH] i386: improve double fault handling
, Ingo Molnar
, (Mon Jul 21, 4:05 am)
Re: [PATCH] i386: improve double fault handling
, Jan Beulich
, (Tue Jul 22, 3:13 am)
Re: [PATCH] i386: improve double fault handling
, Joerg Roedel
, (Wed Jul 23, 2:43 pm)
Re: [PATCH] i386: improve double fault handling
, Jan Beulich
, (Thu Jul 24, 12:08 am)
Re: [PATCH] i386: improve double fault handling
, H. Peter Anvin
, (Thu Jul 24, 6:24 am)
Re: [PATCH] i386: improve double fault handling
, Ingo Molnar
, (Mon Jul 28, 6:42 am)
Re: [PATCH] i386: improve double fault handling
, H. Peter Anvin
, (Mon Jul 28, 6:45 am)
Re: [PATCH] i386: improve double fault handling
, Jan Beulich
, (Mon Jul 28, 6:59 am)
Re: [PATCH] i386: improve double fault handling
, H. Peter Anvin
, (Mon Jul 28, 7:02 am)
Re: [PATCH] i386: improve double fault handling
, Ingo Molnar
, (Mon Jul 28, 9:28 am)
Re: [PATCH] i386: improve double fault handling
, Chuck Ebbert
, (Mon Jul 28, 3:00 pm)
Re: [PATCH] i386: improve double fault handling
, Ingo Molnar
, (Thu Jul 31, 3:46 am)
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