Messages in this thread |  | | | Date | Wed, 06 May 2009 08:26:18 -0400 | | From | Rik van Riel <> | | Subject | Re: [PATCH 2/6] ksm: dont allow overlap memory addresses registrations. |
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Izik Eidus wrote: > Rik van Riel wrote: >> Izik Eidus wrote: >>> subjects say it all. >> >> Not a very useful commit message. >> >> This makes me wonder, though. >> >> What happens if a user mmaps a 30MB memory region, registers it >> with KSM and then unmaps the middle 10MB? > > User cant break 30MB into smaller one.
The user can break up the underlying VMAs though.
I am just wondering out loud if we really want two VMA-like objects in the kernel, the VMA itself and a separate KSM object, with different semantics.
Maybe this is fine, but I do think it's a question that needs to be thought about.
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