[Xen-devel] [PATCH] EPT: Only sync pcpus on which a domain's vcpus might be running

[George Dunlap <dunlapg@xxxxxxxxx>]

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>

Attachment: 20090917-unstable-ept-sync.diff
Description: Text Data

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