kern/104288: Write Errors on md0

[Kris Kennaway]

On Wed, Oct 11, 2006 at 06:50:19AM +0000, Gerhard Schmidt wrote:
> The following reply was made to PR kern/104288; it has been noted by GNATS.
> 
> From: Gerhard Schmidt <estartu at augusta.de>
> To: bug-followup at FreeBSD.org
> Cc:  
> Subject: Re: kern/104288: Write Errors on md0
> Date: Wed, 11 Oct 2006 08:47:20 +0200
> 
>  I've manage to get a core file. 
>  
>  it can bedownloaded at 
>  http://etustar.ze.tum.de/vmcore.1.bz2 (697M) 
>  
>  The infofile contains the following infos 
>  
>  Dump header from device /dev/ad4s1b
>    Architecture: i386
>    Architecture Version: 2
>    Dump Length: 1073020928B (1023 MB)
>    Blocksize: 512
>    Dumptime: Wed Oct 11 08:05:23 2006
>    Hostname: etustar.ze.tum.de
>    Magic: FreeBSD Kernel Dump
>    Version String: FreeBSD 6.1-STABLE #8: Sat Sep 16 09:19:34 CEST 2006
>      root at etustar.ze.tum.de:/usr/src/sys/i386/compile/ETUSTAR
>    Panic String: kmem_malloc(16384): kmem_map too small: 335544320 total allocated
>    Dump Parity: 3197890094
>    Bounds: 1
>    Dump Status: good

Don't use malloc backing for your md when you don't have enough RAM to
support it.  See the mdconfig manpage and several other PRs.

Kris