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Subject[PATCH 0/6] xen: don't call vmalloc_sync_all() when mapping foreign pages
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This set of pages avoids the need to call vmalloc_sync_all() when
mapping foreign pages. Two new functions are adding for mapping
foreign pages onto RAM pages instead of vmalloc space.

This does waste a page of RAM for each mapped page. In the future a
ballooned page could be used instead (once the API for getting a
ballooned page with the right GFP flags is available).

David



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