Re: [PATCH/RFC] AutoPage Migration - V0.1 - 0/8 Overview

[Avi Kivity <avi@argo.co.il>]

Christoph Lameter wrote:

>cpusets uses _MOVE_ALL because Paul wanted it that way. I still think it 
>is a bad idea to move shared libraries etc. _MOVE only moves the pages used
>by the currently executing process. If you do a MOVE_ALL then you may 
>cause delays in other processes because they have to wait for their pages 
>to become available again. Also they may have to generate additional 
>faults to restore their PTEs. So you are negatively impacting other 
>processes. Note that these wait times can be extensive if _MOVE_ALL is 
>f.e. just migrating a critical glibc page that all processes use.
>  
>
Doesn't it make sense to duplicate heavily accessed shared read-only pages?

Something like page migration, but keeping the original page intact. 
Unfortunately, for threaded applications, it means page table bases 
(cr3) can't be shared among threads.

-- 
error compiling committee.c: too many arguments to function

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