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Bug#444271: marked as done (Slow hard drive performance on IOP32x (ARM))

Your message dated Wed, 5 Aug 2009 21:44:44 +0200
with message-id <20090805194444.GD31429@galadriel.inutil.org>
and subject line Re: Bug#444271: 2.6.26 kernel with Intel DMA patches
has caused the Debian Bug report #444271,
regarding Slow hard drive performance on IOP32x (ARM)
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
444271: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=444271
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: linux-2.6
Version: 2.6.18.dfsg.1-12
Severity: important

Several users of Debian on Thecus N2100 have reported (see [1] and
[2]) that their hard drive performance goes down significantly after
moving from the original firmware to Debian.

It goes from something like:

| Timing cached reads: 424 MB in 2.00 seconds = 212.00 MB/sec
| Timing buffered disk reads: 158 MB in 3.01 seconds = 52.49 MB/sec

down to:

| Timing cached reads: 60 MB in 2.00 seconds = 29.95 MB/sec
| Timing buffered disk reads: 60 MB in 3.07 seconds = 19.53 MB/sec

This also happens with 2.6.23.

I found that Intel has some patches for the DMA engine that are
required to get the original speed.

[1] http://lists.debian.org/debian-arm/2007/09/msg00088.html
[2] http://thecususergroup.proboards106.com/index.cgi?action=display&board=modifications&thread=1186052573
-- 
Martin Michlmayr
http://www.cyrius.com/

--- End Message ---
--- Begin Message --- 
tags 444271 +wontfix
thanks

On Fri, Jul 31, 2009 at 06:50:38AM +0200, Martin Michlmayr wrote:
> * Moritz Muehlenhoff <jmm@inutil.org> [2009-07-30 22:18]:
> > > I intend to maintain a 2.6.26 kernel with these DMA patches throughout
> > > the lifetime of Debian lenny.  When a new kernel update is made to
> > > lenny, I will update my repository accordingly.
> > 
> > Martin, have the patches been merged in mainline since the Lenny
> > release?
> 
> No, and this is never going to happen.  I suppose we should tag the
> bug as "wontfix" and closes it with a reference to my APT repository
> that contains the lenny kernel with those those patches.  What do you
> think?

Ok, doing so. Martin's kernels can be fetched through the following
apt source:

deb http://people.debian.org/~tbm/dma lenny main

Since the patches are not going to be accepted by upstream, I'm closing
the bug.

Cheers,
        Moritz

--- End Message ---
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