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Subject: Re: [ck] Re: Autoregulate swappiness & inactivation
From: Mikhail Ramendik <mr@ramendik.ru>
To: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Con Kolivas <kernel@kolivas.org>, Andrew Morton <akpm@osdl.org>,
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Hello,

Nick Piggin wrote:

> > Umm I think we're agreeing, no? I'm trying to leave the swappiness knob 
> > in for those who (think?) they know what they're doing. Somehow it needs 
> > to be turned to "manual" again.
> No. Fold your all "autoswappiness" stuff directly into the
> reclaim_mapped calculation that was previously keyed off swappiness.
> Don't have it modify vm_swappiness at all: work directly on
> reclaim_mapped.
> 
> Then, you should be able to retain the user's vm_swappiness input
> into the system as well. If you can't figure out a good place to
> put this in, don't worry about it to start with.

I, as a user, would be far less happy without the ability to set it to
"the old way". Of course "the old" vs "the new" may become a kernel
config option, but why is a recompile better than a sysctl? Out of 
principle?

Yours, Mikhail Ramendik