Re: KSM Algorithm

[Izik Eidus <izik@qumranet.com>]

ציטוט Sukanto Ghosh:
> One more query, what if multiple processes call ioctl KSM_CREATE_SCAN
> ? Will there be multiple scanners ?
>   
yes

> Consider a scenario where two processes A & B separately call
> KSM_CREATE_SCAN and then start registering some memory pages/areas via
> KSM_CREATE_SHARED_MEMORY_AREA ioctl.
> Lets say A registers 4 pages having content X, Y, Z and X . And,
> process B registers 2 pages having content Z and X.
> So, will there be only single copy each of X, Y and Z in the entire
> system or will they be kept separately i.e the scanner for A maintains
> X, Y, Z single copy each and scanner for B maintains X and Z
> separately.
>   
there will be only one copy,
ksm is multi threaded safe.

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