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[Xen-devel] [PATCH] VMX: avoid taking locks with irqs disabled
| To: | xen-devel@xxxxxxxxxxxxxxxxxxx |
|---|---|
| Subject: | [Xen-devel] [PATCH] VMX: avoid taking locks with irqs disabled |
| 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 |
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| Sender: | xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
| User-agent: | Mutt/1.5.17 (2007-11-01) |
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>
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