ZFS kmem_map too small.

Dag-Erling Smørgrav des at des.no
Mon Oct 8 08:29:02 PDT 2007


Dag-Erling Smørgrav <des at des.no> writes:
> Bernd Walter <ticso at cicely12.cicely.de> writes:
> > On Mon, Oct 08, 2007 at 03:30:41PM +0200, Dag-Erling Smørgrav wrote:
> > > Speaking of which, I tried setting vm.kmem_size to 2G on a C2D system
> > > with 4 GB RAM, but it simply panics:
> > > 
> > > OK set vm.kmem_size=2G
> > This sounds like there's a signed 32 bit limit somewhere.
> Yes, this is really stupid - vm.kmem_size is an int.  Thanks for setting
> me on the right track.

Actually, somebody pointed out to me that due to the memory model used,
amd64 can only have 2 GB KVA, and that includes other things besides
kmem, so even with the tunable bug fixed, the best I can hope for is
probably 1.5 GB.

DES
-- 
Dag-Erling Smørgrav - des at des.no


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