Still getting kmem exhausted panic

Artem Belevich fbsdlist at
Wed Sep 29 01:08:24 UTC 2010

On Tue, Sep 28, 2010 at 3:22 PM, Andriy Gapon <avg at> wrote:
> BTW, have you seen my posts about UMA and ZFS on hackers@ ?
> I found it advantageous to use UMA for ZFS I/O buffers, but only after reducing
> size of per-CPU caches for the zones with large-sized items.
> I further modified the code in my local tree to completely disable per-CPU
> caches for items > 32KB.

Do you have updated patch disabling per-cpu caches for large items?
I've just rebuilt FreeBSD-8 with your uma-2.diff (it needed r209050
from -head to compile) and so far things look good. I'll re-enable UMA
for ZFS and see how it flies in a couple of days.


More information about the freebsd-stable mailing list