Date: Sun, 25 Oct 2009 07:07:07 +0100 From: Thomas Backman <serenity@exscape.org> To: Doug Poland <doug@polands.org> Cc: freebsd-current@freebsd.org Subject: Re: Fatal trap 12 on ZFS in 8.0-RC1 Message-ID: <2D80E5CB-71E5-4F4F-A84B-A95C18B50F47@exscape.org> In-Reply-To: <46e678eb1eeca98033b15979e034a765.squirrel@email.polands.org> References: <46e678eb1eeca98033b15979e034a765.squirrel@email.polands.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Oct 25, 2009, at 3:10 AM, Doug Poland wrote: > Hello, > > I'm experimenting with ZFS on 8-0-RC1 (amd64) in a VMWare virtual > machine w/2GB RAM. In installed ZFS on GPT root using the excellent > instructions at http://wiki.freebsd.org/RootOnZFS/GPTZFSBoot/RAIDZ1. > > All was well until I tried some benchmarking with > benchmarks/unixbench. I kept getting kmem_map too small panics on the > filesystem tests so starting playing with vm.kmem_size. > > I finally got unixbench through the first 6 Filesystem Throughput > tests with: > vm.kmem_size="1296M" > vm.kmem_size_max="1296M" > vfs.zfs.arc_max="128M" > vfs.zfs.vdev.cache.size="24M" (i think) > > Unfortunately, ZFS paniced with: > Fatal trap 12: page fault while in kernel mode. Now, when I attempt to > restart the VM, as soon as the "boot menu" is gone, I immediately get > the same Fatal trap 12 panics again and cannot get past this point. > > I've got the 8.0-RC1 DVD and can run Fixit, but have no idea how to > repair this broken ZFS installation. Suggestions welcome. You should be able to break into the loader prompt (choice #6 IIRC) and do unset vm.kmem_size unset vm... ... etc. boot That way, you'll be back to the earlier panics, but at least it'll boot. Oh, and the settings aren't permanent, so make editing /boot/ loader.conf your first prority. Regards, Thomas
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?2D80E5CB-71E5-4F4F-A84B-A95C18B50F47>