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SubjectRe: IDE is still crap.. or something
----- Original Message -----
From: "Marcelo Tosatti" <>
To: "Martin Eriksson" <>
Cc: "lkml" <>
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 <>
| MSc CSE student, department of Computing Science
| Umeå 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
> > copying a 500MB file between two hard drives (running ext3). I have
> > 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
> > had some strange rejects so it will be exciting to see if it works. I
> > good response from the -ac kernel series though.

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