Re: 2.4.17 RAID-1 EXT3 reliable to hang....

From: Oliver Paukstadt (
Date: Mon Jan 07 2002 - 03:39:47 EST

On Mon, 7 Jan 2002, Andrew Morton wrote:

> Matti Aarnio wrote:
> >
> > I have partial evidence that EXT3 may be part of the problem,
> > as another machine with RAID-1 disks with EXT2 filesystems
> > is not hanging up when running RedHat 2.4.16-0.9custom kernel.
> > That another machine has, however, IDE disks.
> I'd be surprised if an ext3 bug could cause a freeze as solid
> as this one. ext3's write submission patterns are somewhat different
> from other filesystems, and we've exposed a few problem in underlying
> layers in the past because of this. But who knows...
> Have you enabled the NMI watchdog? nmi_watchdog=1 on the LILO
> commandline?
> Also, I'd be inclined to enable all the kernel debug options,
> including SLAB debug.
Heavy traffic on ext3 seems to cause short system freezes.

Seems only to happen on 2 or more processor boxes.

I'm not deep into kernel nor ext3, but how is the journal flushed if

Greetings Oli

+++the jungle near manaos - the amazonas full of piranhas - the birds of++
+++paradies - disapear into the green desert - for years an years we're+++
+++hungry and desperate - for the only thing worth living - the E><CESS+++

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