RE: 4.9 boot problem on em0 platform.

From: Don Bowman (don_at_sandvine.com)
Date: 02/29/04

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    To: 'Deepak Jain' <deepak@ai.net>, Don Bowman <don@sandvine.com>, freebsd-hackers@freebsd.org
Date: Sun, 29 Feb 2004 16:17:31 -0500

    From: Deepak Jain [mailto:deepak@ai.net]
    > > Just a guess, but i think you've bumped nmbclusters or nmbufs up
    > > too much (or perhaps maxsockets, maxfds, ...) and have run out of
    > > KVA.
    > >
    > > You can tune clusters & mbufs in loader.conf without recompiling
    > > kernel. You will want to see what vm.zone_kmem_pages,
    > vm.zone_kmem_kvaspace
    > > are showing you, vmstat -z, vmstat -m, etc.
    > >
    > > You may want to alter VM_KMEM_SIZE_SCALE to e.g. '2' if you are
    > > trying to put more into the kernel mem space.
    > >
    >
    > The kernel that works from another machine has the same settings
    > (NMBCLUSTERS=65536, maxusers=512). The machine has 2GB of RAM.
    >
    > How do you undo the loader.conf settings when the machine won't boot
    > because of the settings you made? :|

    Use 'space' to get to the 'ok' loader prompt.
    now 'set' the values to a lower #...

    ok set path.path.path=value

    man loader will tell you about this.

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