Re: 2.6.25-rc1 xen pvops regression
From: H. Peter Anvin
Date: Thu Feb 21 2008 - 18:32:30 EST
Jeremy Fitzhardinge wrote:
It seems to me that those pages are being handed out as heap pages by
the early allocator. In the Xen case this is OK because there's nothing
magic about them. But if real hardware doesn't reserve these pages in
the E820 map, then they could end up being used as regular memory by
mistake, which is an issue.
No, they couldn't.
On real hardware they'll be memory types 0 or 2, depending on whether or
not they're marked reserved.
Available RAM is type 1.
-hpa
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