Re: arca-vm-8 [Re: [patch] arca-vm-6, killed kswapd [Re: [patch] new-vm , improvement , [Re: 2.2.0 Bug summary]]]

[ebiederm+eric@ccr.net (Eric W. Biederman)]

>>>>> "LT" == Linus Torvalds <torvalds@transmeta.com> writes:

LT> Oh, well.. Based on what the arca-[678] patches did, there's now a pre-5
LT> out there. Not very similar, but it should incorporate the basic idea: 
LT> namely much more aggressively asynchronous swap-outs from a process
LT> context. 

LT> Comment away,

1) With your comments on PG_dirty/(what shrink_mmap should do) you
   have worked out what needs to happen for the mapped in memory case,
   and I haven't quite gotten there.  Thank You.

2) I have tested using PG_dirty from shrink_mmap and it is a
   performance problem because it loses all locality of reference,
   and because it forces shrink_mmap into a dual role, of freeing and
   writing pages, which need seperate tuning.

Linus is this a case you feel is important to tune for 2.2?
If so I would be happy to play with it.

Eric
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