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[Xen-devel] [PATCH] EPT: Only sync pcpus on which a domain's vcpus might
| To: | xen-devel@xxxxxxxxxxxxxxxxxxx, Keir Fraser <keir.fraser@xxxxxxxxxxxxx>, Tim Deegan <Tim.Deegan@xxxxxxxxxx>, Xin Li <xin.b.li@xxxxxxxxx>, Jun Nakajima <jun.nakajima@xxxxxxxxx>, Xiaohui Xin <Xiaohui.xin@xxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] [PATCH] EPT: Only sync pcpus on which a domain's vcpus might be running |
| From: | George Dunlap <dunlapg@xxxxxxxxx> |
| Date: | Thu, 17 Sep 2009 18:51:56 +0100 |
| Cc: | |
| Delivery-date: | Thu, 17 Sep 2009 10:52:24 -0700 |
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ept_sync_domain() is called whenever the p2m changes. The current code calls sync on all cpus; this is extremely wasteful, especially for a single-vcpu VM on a 16-way (2x4x2) box. This patch will only call sync on cpus where there may be dirty cpu state. I've done a basic test, but I'd appreciate someone from Intel verifying that there shouldn't be any problems. Signed-off-by: George Dunlap <george.dunlap@xxxxxxxxxxxxx>
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