Is there any way to increase the KVM?

Jeremy Chadwick koitsu at
Sun Jun 1 08:58:36 UTC 2008

On Sun, Jun 01, 2008 at 04:43:48PM +0800, Tz-Huan Huang wrote:
> On Sun, Jun 1, 2008 at 4:03 AM, Maslan <maslanbsd at> wrote:
> > Your are right PAE is for i386, i mean try running i386 freebsd with
> > PAE enabled rather than amd64. PAE will let you access 64GB which is
> > far than you got.
> The whole 8G physical memory is available in our system, the point we
> concerned is that the kernel cannot use more than 2G memory in kernel
> space.

Your concern is justified; I don't think Maslan understands what it is
you're describing.  Yes, there is a 2GB limit for kmem_size.  Yes, that
limit applies to both i386 (with or without PAE) and amd64.  Yes, it's a
problem.  And yes, it's absolutely a problem (especially when it comes
to ZFS).

> Since the server is on line now, we cannot re-install it to i386 to check this.
> We'll try it if we have spare machines.

Don't bother -- it won't fix the problem you're reporting.

| Jeremy Chadwick                                jdc at |
| Parodius Networking              |
| UNIX Systems Administrator                  Mountain View, CA, USA |
| Making life hard for others since 1977.              PGP: 4BD6C0CB |

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