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[Xen-devel] [PATCH] fix for NMI causing auto reboot with SMP domains

  • To: <xen-devel@xxxxxxxxxxxxxxxxxxx>
  • From: "Santos, Jose Renato G" <joserenato.santos@xxxxxx>
  • Date: Wed, 19 Oct 2005 10:42:57 -0700
  • Delivery-date: Wed, 19 Oct 2005 17:40:13 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
  • Thread-index: AcXU1IqMJTzbrMEKSvGC0iwZiB8jnA==
  • Thread-topic: [PATCH] fix for NMI causing auto reboot with SMP domains

  This patches fix a NMI problem I was seeing when running xenoprof on
SMP guests.
  The machine used to auto reboot if an NMI was received in a critical
time window when
  context switching domains. There is a small time window when the GDT
may become unmapped
  (after CR3 is updated and before setting GDTR with the new GDT during
a domain context
  switch. If an NMI is received during this time window a triple fault
is triggered causing
  the machine to auto reboot. This patch fix this problem. Please,

  I should be sending patches for the new version of xenoprof that
supports SMP domains
  profiling , shortly.


  Signed-off-by: Jose Renato Santos <jsantos@xxxxxxxxxx>

Attachment: nmi_fault_fix.patch
Description: nmi_fault_fix.patch

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