Re: Benchmarking 2.2 and 2.4 using hdparm and dbench 1.1

[Roger Larsson]

On Tuesday 09 January 2001 12:08, Anton Blanchard wrote:
> > Where is the size defined, and is it easy to modify?
>
> Look in fs/buffer.c:buffer_init()
>
> > I noticed that /proc/sys/vm/freepages is not writable any more.  Is there
> > any reason for this?
>
> I am not sure why.
>

It can probably be made writeable, within limits (caused by zones...)

But the interesting part is that 2.4 tries to estimate how much memory it 
will need shortly (inactive_target) and try to keep that amount inactive 
clean (inactive_clean) - clean inactive memory can be freed and reused very
quickly.

cat /proc/meminfo

My feeling is that, for now, keeping it untuneable can help us in finding 
fixable cases...

/RogerL

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