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SubjectRe: [PATCH 2/6] ksm: dont allow overlap memory addresses registrations.
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.

--
All rights reversed.


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