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From: "Martin Eriksson" <nitrax@giron.wox.org>
To: "Marcelo Tosatti" <marcelo@conectiva.com.br>
Cc: "lkml" <linux-kernel@vger.kernel.org>
In-Reply-To: <Pine.LNX.4.21.0111231627020.11090-100000@freak.distro.conectiva>
Subject: Re: IDE is still crap.. or something
Date: Fri, 23 Nov 2001 20:59:18 +0100
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----- Original Message -----
From: "Marcelo Tosatti" <marcelo@conectiva.com.br>
To: "Martin Eriksson" <nitrax@giron.wox.org>
Cc: "lkml" <linux-kernel@vger.kernel.org>
Sent: Friday, November 23, 2001 7:27 PM
Subject: Re: IDE is still crap.. or something


>
> Any previous kernel gave you good performance ?

No.. not really. Except -ac kernels and kernels with the preempt patch.

I'll just clarify: The problem is not that hard disk operations gets slow (I
can understand *that*, as it's a MW-DMA2 disk and one UDMA33 running ext3),
instead the real problem is that the system as a *whole* gets painfully
slow. Whilst copying a 500MB file, it takes ~6-8 seconds to start a new ssh
session from my windows comp to my linux server, compared to <1 second when
running preempt/ac kernels.

_____________________________________________________
|  Martin Eriksson <nitrax@giron.wox.org>
|  MSc CSE student, department of Computing Science
|  Ume? University, Sweden

>
> On Fri, 23 Nov 2001, Martin Eriksson wrote:
>
> > Well, just wanted to tell you that 2.4.15 still slows down to a crawl
when
> > copying a 500MB file between two hard drives (running ext3). I have
tried
> > any of the -c -u -m -W settings in hdparm. I even applied the 2.4.14 IDE
> > patch (after fixing the rejects) but no go.
> >
> > Even iptables is affected, because it takes forever to surf the internet
> > from my behind-linux-firewall windows computer.
> >
> > I'm right now trying to apply the preemptive-kernel patch to 2.4.15 but
it
> > had some strange rejects so it will be exciting to see if it works. I
get
> > good response from the -ac kernel series though.


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