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VM followup: page migration and fragmentation avoidance

Posted Nov 25, 2005 21:14 UTC (Fri) by oak (guest, #2786)
In reply to: VM followup: page migration and fragmentation avoidance by farnz
Parent article: VM followup: page migration and fragmentation avoidance

Wouldn't this help also with something like Xen?

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Posted Dec 1, 2005 15:15 UTC (Thu) by farnz (guest, #17727) [Link]

My (limited) understanding of Xen suggests not; Xen maps pages directly into the guest's address space (it just indirects page table changes through the hypervisor). Therefore, Xen doesn't gain from physical page migration or defragmentation (it always maps page-by-page, not in blocks).