From owner-freebsd-fs@FreeBSD.ORG  Mon Oct  8 12:42:37 2007
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Date: Mon, 08 Oct 2007 14:26:32 +0200
From: Micha Mutschler <master-list@arcor.de>
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Subject: Re: ZFS kmem_map too small.
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Pawel Jakub Dawidek wrote:

> If you can still see those panic, please let me know as soon as possible
> and try to describe what your workload looks like, how to reproduce it,
> etc. I'd really like ZFS to be rock-stable for 7.0 even on i386.
> 

Hi!

I was doing a ports rsync from a zfs to /usr/ports (ufs). That worked
fine. The crash happend as I started to copy (parallel to the rsync) a
huge file from a nfs server to the zfs.

For 512 MB RAM I've set:

kern.maxvnodes="25000"
vfs.zfs.prefetch_disable="1"
vfs.zfs.arc_max="52428800"
vm.kmem_size_max="402653184"
vfs.zfs.zil_disable="1"

[root@filer ~]# zpool status
  pool: xport
 state: ONLINE
 scrub: none requested
config:

        NAME        STATE     READ WRITE CKSUM
        xport       ONLINE       0     0     0
          raidz1    ONLINE       0     0     0
            ad8     ONLINE       0     0     0
            ad9     ONLINE       0     0     0
            ad10    ONLINE       0     0     0
            ad11    ONLINE       0     0     0

errors: No known data errors
[root@filer ~]#
[root@filer ~]# zfs list
NAME          USED  AVAIL  REFER  MOUNTPOINT
xport        33.8G   514G  33.6G  /xport
xport/ports   212M   514G   212M  /xport/ports
xport/t      26.9K   514G  26.9K  /xport/t
[root@filer ~]#


(I'm using 200709)
regarts,

Micha Mutschler