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[Xen-devel][PATCH] avoid the EPT table scanning errors occurs when split
| To: | "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel][PATCH] avoid the EPT table scanning errors occurs when splitting the large page during live migration |
| From: | "Xin, Xiaohui" <xiaohui.xin@xxxxxxxxx> |
| Date: | Fri, 17 Apr 2009 14:15:00 +0800 |
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| Delivery-date: | Thu, 16 Apr 2009 23:18:12 -0700 |
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| Thread-index: | Acm/I9bqVrCEUMJGR9SFfjmcv2LncQ== |
| Thread-topic: | [Xen-devel][PATCH] avoid the EPT table scanning errors occurs when splitting the large page during live migration |
Since Xen did not lock the p2m table for p2m table reading, when splitting the large page during live migration, we should make sure the path of EPT entries be modified are always there while other CPUs may access the super entries at the same time. Signed-off-by: Xin, Xiaohui <xiaohui.xin@xxxxxxxxx>
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