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[Xen-devel] Move MEMZONE_XEN to the last
| To: | <xen-devel@xxxxxxxxxxxxxxxxxxx>, "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx> |
|---|---|
| Subject: | [Xen-devel] Move MEMZONE_XEN to the last |
| From: | "Tian, Kevin" <kevin.tian@xxxxxxxxx> |
| Date: | Wed, 21 Mar 2007 13:56:58 +0800 |
| Cc: | "Jiang, Yunhong" <yunhong.jiang@xxxxxxxxx> |
| Delivery-date: | Tue, 20 Mar 2007 22:56:04 -0700 |
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| Thread-index: | AcdrfbxSnJLS4ENvSZCWOz4WCGzqkw== |
| Thread-topic: | Move MEMZONE_XEN to the last |
Zone index for domain heap is derived from bits, while zone index for
xen heap takes 0 to catch all. This looks a bit messed which prevents
future extension. For example, if Xen can be located at higher memory:
- The assumption that domheap starts from MEMZONE_XEN+1
doesn't hold true
- The memory within the very bit but out of xenheap can't be
claimed by domheap since that bit belongs to xenheap exclusively
So how about moving MEMZONE_XEN to the last
(current NR_ZONES plus 1)? That can ensure domheap covering all
possible bits exactly.
Thanks,
Kevin
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