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SubjectRe: Performance issue on dual Athlon MP
> I have a dual Athlon MP box (Tyan S2460 Tiger MP, 1.53 GHz, 2.5 GB Corsair
> PC2100). The initial installation was of SuSE 7.3, but I have upgraded to
> 2.4.17 with Andrea's 3.5 GB userspace patch.

> Is this a known problem with 2.4.17 and/or the 3.5 GB userspace patch? I
> have not tried turning off the 3.5 GB config option (`CONFIG_05GB'). I do
> have `CONFIG_MK7' set.

The configuration I would try first on 2.4.19pre1aa1 with 2.5 GB of RAM is
CONFIG_3GB=y and CONFIG_NOHIGHMEM=y. If that causes some other problem,
I'd go with CONFIG_2GB, then finally CONFIG_1GB. Each config changes
the user/kernel memory split. The loads I've run suggest for best


On my 1GB box, I've been running CONFIG_2GB for a couple months and
performance is great. Only lingering question for me is the handling
of oom. Oom hasn't caused be a problem, but I haven't seen the oom
killer do it's work when I create an oom condition.

BTW, Andrew Morton's read_latency2 patch is a winner. The read_latency2
diff I use on my 2.4.19pre1aa1 boxes is at:

Randy Hron

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