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[Xen-devel] [PATCH] VMX: avoid taking locks with irqs disabled

To: xen-devel@xxxxxxxxxxxxxxxxxxx
From: Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Date: Mon, 20 Oct 2008 10:30:23 +0100
Delivery-date: Mon, 20 Oct 2008 02:30:53 -0700
List-id: Xen developer discussion <xen-devel.lists.xensource.com>

Shuffle the bits of the vmexit handler that run with EFLAGS.IF == 0 up
to the top.  Otherwise we end up calling spin_lock() with interrupts
disabled, which can deadlock against the time-synchronization rendezvous
code.

Signed-off-by: Tim Deegan <Tim.Deegan@xxxxxxxxxx>

Attachment: deadlock
Description: Text document

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