Date: Sun, 3 Oct 2010 13:12:48 -0500 From: Alan Cox <alan.l.cox@gmail.com> To: Dave Hayes <dave@jetcafe.org> Cc: freebsd-stable <freebsd-stable@freebsd.org> Subject: Re: Panic: attempted pmap_enter on 2MB page Message-ID: <AANLkTikenQoA7UBo_N3bzQJ9ABJSTGL89_Qda_Tu7Wa0@mail.gmail.com> In-Reply-To: <201010030211.o932Bd4C048116@hugeraid.jetcafe.org> References: <201010030211.o932Bd4C048116@hugeraid.jetcafe.org>
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On Sat, Oct 2, 2010 at 9:11 PM, Dave Hayes <dave@jetcafe.org> wrote: > What does the above mentioned panic mean? I'm booting from > an mfsroot off of a DVD with a loader.conf like this: > > autoboot_delay="5" > mfsroot_load="YES" > mfsroot_type="mfs_root" > mfsroot_name="/mfsboot" > vfs.root.mountfrom="ufs:md0" > vfs.root.mountfrom.options="rw" > kern.ipc.nmbclusters=32768 > net.inet.tcp.tcbhashsize=16384 > vm.pmap.pg_ps_enabled=1 > vm.kmem_size="2G" > accf_http_load="YES" > net.inet.tcp.syncache.hashsize=1024 > net.inet.tcp.syncache.bucketlimit=100 > > This is FreeBSD 8.1-RELEASE amd64 running with the debugger installed > into the kernel. Thanks in advance for any insight provided. :) > I'm afraid that I can't offer much insight without a stack trace. At initialization time, we map the kernel with 2MB pages. I suspect that something within the kernel is later trying to change one those mappings. If I had to guess, it's related to the mfs root. Regards, Alan
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