ZFS and deadlock with {nullfs,NFS}

[John Nielsen]

On Wednesday 20 June 2007 12:30:23 pm Dan Mack wrote:
> On Wed, 20 Jun 2007, Kris Kennaway wrote:
>
> <snip>
>
> > 404 at the moment, but look for processes involving zil* in the
> > backtrace.  I had to disable zil (vfs.zfs.zil_disable=1 tunable) to
> > prevent low-memory deadlocks on my machines.  Since then it's been
> > fine.
> >
> > You may also wish to use my patches (see the archives) to improve
> > performance and low-memory behaviour.
> >
> > Kris
>
> Does someone have these recommended sysctls embodied in an example
> /boot/loader.conf yet?   Here is mine, does it look reasonable to keep ZFS
> from running into the kmem_ memory panics?  I have no idea if I found all
> of your recommendations so it would be nice if they were summarized in one
> place.
>
>   |  # /boot/loader.conf  i386 / 1GB memory / SMP
>   |  kern.maxvnodes="50000"

Note that kern.maxvnodes has to be set in /etc/sysctl.conf to have any effect.

JN