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From: Ged Haywood <ged@www2.jubileegroup.co.uk>
To: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
Cc: rddunlap@osdl.org, linux-kernel@vger.kernel.org
Subject: Re: All filesystems hang under long periods of heavy load (read and write) on a filesystem
Date: Wed, 31 Dec 2003 17:26:26 +0000 (GMT)	[thread overview]
Message-ID: <Pine.LNX.4.21.0312292153150.405-100000@www2.jubileegroup.co.uk> (raw)
In-Reply-To: <Pine.LNX.4.58L.0312281816140.15034@logos.cnet>

Hi Marcelo,

On Mon, 29 Dec 2003, Marcelo Tosatti wrote:

> > there is certainly something nasty in the released 2.4.23 IDE code...
> 
> The attached patch from Daniel Lux should fix it. Its has just been
> applied to the 2.4 BK tree.
> 
> Please try it.

Thanks very much for the patch, I can see how that piece of code could
well be causing the problem.

Between my message and your reply, someone else came up with another
clue for me and I found that enabling DMA for the drive appears if not
to fix the problem at least to avoid it fairly well.  I think using
DMA for most of the transfers makes it less likely that the lockup
will be triggered.  At least this gets me out of the immediate bind.

It's a busy machine and it's a little painful to keep rebooting it.
I'm going to put an identical one together for testing.  When I've
done that I'll test the patch to destruction.

It will be a couple of weeks before I can get to the bench to do it,
but then it should only take a few hours to be sure it's a good fix.
I'll certainly get back to you with the results.

Thanks again for the pointer.

73,
Ged.



  reply	other threads:[~2003-12-31 17:26 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-12-23 18:01 All filesystems hang under long periods of heavy load (read and write) on a filesystem Ged Haywood
2003-12-29 15:32 ` Ged Haywood
2003-12-29 19:32 ` Marcelo Tosatti
2003-12-31 17:26   ` Ged Haywood [this message]
  -- strict thread matches above, loose matches on Subject: below --
2003-11-03 23:46 Shirley Shi
2003-11-04  7:33 ` bert hubert
2003-11-04  9:28 ` Bernd Petrovitsch
2003-11-04 15:52 ` Randy.Dunlap

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