Date: Tue, 6 Nov 2007 01:31:42 +0200 From: "Niki Denev" <nike_d@cytexbg.com> To: freebsd-current@freebsd.org Cc: freebsd-fs@freebsd.org Subject: Re: ZFS kmem_map too small. Message-ID: <2e77fc10711051531k41e7224dq6aaedb35cad8d9f2@mail.gmail.com> In-Reply-To: <20071105215035.GC26730@heff.fud.org.nz> References: <20071005000046.GC92272@garage.freebsd.pl> <20071008121523.GM2327@garage.freebsd.pl> <20071105215035.GC26730@heff.fud.org.nz>
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On Nov 5, 2007 11:50 PM, Andrew Thompson <thompsa@freebsd.org> wrote: > On Mon, Oct 08, 2007 at 02:15:23PM +0200, Pawel Jakub Dawidek wrote: > > Here are some updates: > > > > I was able to reproduce the panic by rsyncing big files and trying > > bonnie++ test suggested in this thread. > > > > Can you guys retry with this patch: > > > > http://people.freebsd.org/~pjd/patches/vm_kern.c.2.patch > > > > It's a hack, yes, but allows to mitigate the problem quite well. I'm > > looking for a solution that can be used for 7.0 before we find a better > > fix. > > Do you still plan to commit this for 7.0 or is a better solution in the > works? I would assume something would need to be in before RC1. > > > BTW. To use ZFS you _must_ increase vm.kmem_size/vm.kmem_size_max. > > If you have the problem discussed here and you're using standard values, > > please retry with vm.kmem_size/vm.kmem_size_max set to at least 600MB in > > /boot/loader.conf. > > > > I'm not sure if it's not too late to ask re@ about increasing the > > default kmem size at least on amd64. ~300MB we have there is silly > > small. > > I have fairly easy reproductable (bonnie++) kmem_map too small panics on AMD64 even with kmem_size and kmem_size_max to 1G on 8Gig machine. I've tried setting them to 2G but the kernel panics on boot. I have compiled in debugger support and can provide backtraces and testing if needed (the machine is still not in production).
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