Re: [PATCH] kswapd fully sysctl tunable
Rik van Riel (H.H.vanRiel@phys.uu.nl)
Sat, 2 May 1998 16:08:03 +0200 (MET DST)
On Sat, 2 May 1998, MOLNAR Ingo wrote:
> On Sat, 2 May 1998, Rik van Riel wrote:
>
> > +dcache_agressive This option can be used when the dcache
> > + is taking up too much memory. This usually
> > + only happens on machines with less than 16
> > + megabytes of RAM. Increasing this value makes
> > + kswapd prune the dcache more agressively, but
> > + it makes name cacheing less effective, causing
> > + more disk reads and decreased performance.
> > + Use this when you need to, but use with care!
>
> not nitpicking, but i'm wondering wether this option just hides the real
> problem. Shouldnt the dcache notice such low-mem situations automagically?
It probably should limit the dcache size to some percentage
of memory, when memory is tight.
I'll maybe take a look at it...
Rik.
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