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[Xen-devel] [PATCH] [Xend] [2/2] Prevent changing of the policy while vi
| To: | xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] [PATCH] [Xend] [2/2] Prevent changing of the policy while virtual machines are migrating |
| From: | Stefan Berger <stefanb@xxxxxxxxxx> |
| Date: | Tue, 04 Nov 2008 12:39:13 -0500 |
| Cc: | Keir Fraser <keir.fraser@xxxxxxxxxxxx> |
| Delivery-date: | Tue, 04 Nov 2008 09:41:03 -0800 |
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| Reply-to: | stefanb@xxxxxxxxxx |
| Sender: | xen-devel-bounces@xxxxxxxxxxxxxxxxxxx |
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@xxxxxxxxxx>
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