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[Xen-devel] [PATCH] Add 2M page support to Xen balloon driver
| To: | Jeremy Fitzhardinge <jeremy@xxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] [PATCH] Add 2M page support to Xen balloon driver |
| From: | Dave McCracken <dcm@xxxxxxxx> |
| Date: | Tue, 16 Jun 2009 10:53:29 -0500 |
| Cc: | Xen Developers List <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | Tue, 16 Jun 2009 08:54:02 -0700 |
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This patch adds a kernel command line option "balloon_hugepages" that, when enabled, will make the balloon driver work in 2M pages (ie hugepages). This will work in conjunction with the "superpages" domain creation option so once a domain is created with 2M contiguous pages it will continue to free and re- allocate at the 2M page size. Note that the current hypervisor code does not allow 2M page allocations for all guest domains. Keir has agreed to change the hypervisor to allow them, but for now "balloon_hugepages" should only be specified on hypervisors that have this change. Dave McCracken Oracle Corp.
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