Re: [BUG] 2.4 VM sucks. Again

From: Roy Sigurd Karlsbakk <roy@karlsbakk.net>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Martin.Bligh@us.ibm.com (Martin J. Bligh), linux-kernel@vger.kernel.org
Subject: Re: [BUG] 2.4 VM sucks. Again
Date: Mon, 27 May 2002 13:12:16 +0200	[thread overview]
Message-ID: <200205271112.g4RBCH103186@mail.pronto.tv> (raw)
In-Reply-To: <E17BGj9-0006VQ-00@the-village.bc.nu>

> > > How much RAM do you have, and what does /proc/meminfo
> > > and /proc/slabinfo say just before the explosion point?
> >
> > I have 1 gig - highmem (not enabled) - 900 megs.
> > for what I can see, kernel can't reclaim buffers fast enough.
> > ut looks better on -aa.
>
> What sort of setup. I can't duplicate the problem here ?

The setup is 2-4 drives in raid0, with chunk size 1MB.

If I try to do ~50 simultanous reads from disk, it's no problem as long as 
the data is being read from the nic with the same speed as it's being read 
from disk. The server apps are running via inetd (testing), and have 2MB of 
buffer each. (read 2MB from disk, write 2MB to NIC).

The server chrashes within minutes. The same problem occurs when using Tux

thanks

roy

-- 
Roy Sigurd Karlsbakk, Datavaktmester

Computers are like air conditioners.
They stop working when you open Windows.