Re: Problems making big fs on DPT RAID

Heinz Mauelshagen (mauelsha@ez-darmstadt.telekom.de)
Mon, 10 Nov 1997 13:02:44 MET

On Wed, 5 Nov 1997 16:04:23 Chris Adams <cadams@ro.com> wrote:
> I am having trouble setting up filesystems on a big array with a DPT
> PM3334UW, e2fstools 1.10 (from RedHat 4.2), and Linux 2.0.31. Whenever
> something accesses the drives attached to the DPT (even the drive not in
> the array), the kernel gobbles memory - and I don't mean buffers/cache.
<SNIP>

Hope i didn't miss to much followups ;-)

Seems to me as a well known scenario i've had testing my logical
volume manager (hopefully the LVM will make it's way
into 2.2).

All the time i tried to make large filesystems greater some GB,
my machine locked up. Buffer management trouble ahead...

So...
Added a check to fs/buffer.c ( at the beginning of grow_buffers ()) to keep
cache buffers in limit (10MB in case of my 64MB box). This doesn't
stress the buffer management too much until it's REALLY fixed.

This workaround let the problem disapear for me working
with filesystems up to 25GB in size.

Please tell me, what it does for you.

Peace hacker,
Heinz

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Systemmanagement Entwicklungsbereich 2           Deutsche Telekom AG
                                                 Entwicklungszentrum Darmstadt
Heinz Mauelshagen                                Otto-Roehm-Strasse 71c
                                                 Postfach 10 05 41
mge@ez-darmstadt.telekom.de                      64205 Darmstadt
                                                 Germany
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