Xen devel - Nov 2008 - [PATCH] [Xend] [2/2] Prevent changing of the policy while virtual machines are migrating

This patch uses the reader-writer lock primitive from part 1 to prevent
the changing of the policy while guest are migrated to a host. The net
changes of this patch are that the reader-side lock is put into the path
of the migration code and the writer lock into the path of the code that
handles the changing of the policy. Simultaneous migrations of multiple
hosts still work after this lock has been added.

Signed-off-by: Stefan Berger <stefanb@us.ibm.com>



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