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[Xen-devel] [PATCH] Fix recursive lock p2m lock acquisition in POD code
| To: | <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] [PATCH] Fix recursive lock p2m lock acquisition in POD code |
| From: | Tim Deegan <Tim.Deegan@xxxxxxxxxx> |
| Date: | Thu, 1 Oct 2009 12:04:12 +0100 |
| Delivery-date: | Thu, 01 Oct 2009 04:04:41 -0700 |
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| User-agent: | Mutt/1.5.18 (2008-05-17) |
The POD code can take the p2m lock from inside a lookup. This causes a crash if anyone calls gfn_to_mfn* with the p2m lock held, which is quite a few places. Make the POD code understand that it may be called with the lock held, and DTRT about talking or releasing it. Signed-off-by: Tim Deegan <Tim.Deegan@xxxxxxxxxx>
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