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SubjectRe: 2.4.10aa1 (00_vm-tweaks-1)
On Sun, 23 Sep 2001, Andrea Arcangeli wrote:

> If you are interested about the VM behaviour under swap (and non) please
> test the 00_vm-tweaks-1 (can be applied to plain 2.4.10), here the swap
> behaviour seems improved with it. Thanks!

2.4.10 seems to behave worse than kernels up to 2.4.9 and 2.4.9ac12
(haven't tried above) with the following workload (everything is only a
subjective impression as a user; I don't look at how long the "rm" and the
"tar" take because that's not very important for me):

FVWM with 6 open xterms is running
XMMS is running

mv linux linux.old
nice rm -rf linux.old &
tar xzf linux-2.4.10.tar.gz &

up to 2.4.9 and 2.4.9ac12:
everything works fine

interactive use of the machine is very bad, I can't type a command in
another xterm

2.4.10 + 00_vm-tweaks-1:
interactive use of the machine works all right, but XMMS does sometimes

This is on a K6 with 300 Mhz. free in 2.4.10 + 00_vm-tweaks-1 gives the
following output:

$ free
total used free shared buffers cached
Mem: 62252 60400 1852 0 2408 32792
-/+ buffers/cache: 25200 37052
Swap: 947824 10264 937560

My impression is that there's a problem when several processes do heavy
non-cachable disk IO.



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