[PC-BSD Testing] Panic from ZFS

Brodey Dover pcfxer at rogers.com
Fri Oct 24 14:44:50 PDT 2008


I absolutely agree. All of my clients are running PC-BSD 7.0 with a few 
zpools, all computers had the system memory upgraded to 2GB on 32-bit 
OSes and 4GB on 64-bit machines.


Edward O'Callaghan wrote:
> Hi,
> You can get version 6 of zfs to panic in FreeBSD by doing the following;
> * Have 512 or less MB of RAM
> * Fill most of your zpool up then run a zpool scrub on the pool..
> This is a out-of-memory kernel panic that particularly affects i386.
> My suggested work around is to put the following into loader.conf
> vfs.zfs.zil_disable=1
> vfs.zfs.prefetch_disable=1
> N.B. Disabling ZIL can have serious consequences depending on your workload.
> FreeBSD 8 upgrades ZFS to version 11. However I am not sure how this
> affects things as this only happens on FreeBSD and not Solaris.
> Kris, As I said before. I highly recommend you disable ZFS support on
> 32bit systems with less then 1gb of ram else people _could_ lose data
> ?
> Hope this helps PC-BSD folk..
> Best Regards,
> Edward.

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