stacked unionfs freeze and crash FreeBSD
gary.jennejohn at freenet.de
Wed Jan 20 15:28:24 UTC 2010
On Wed, 20 Jan 2010 15:43:12 +0200
David Naylor <naylor.b.david at gmail.com> wrote:
> The attached script, that uses stacked unionfs, causes FreeBSD-9 (cvsup
> yesterday) to freeze and FreeBSD-8 (cvsup two days ago) to crash:
> Fatal double fault
> cupid = 2; apic id = 02
> panic: double fault
> cpuid = 2
> uptime: 1h44m35s
> cannot dump. Device not defined or unavailable
> Both systems use the stock GENERIC kernel, i.e. -9 had full diagnostics built
> in (and was run under VirtualBox) and -8 had no diagnostics (and was run
> A LOR is produces prior to freezing under -9 (quiet a time prior). See
> The script uses unionfs to build ports (in an attempt to create a tinderbox
> without the need to delete and/or extract packages). To use the script to:
> # mkdir /tmp/localbase /tmp/builddir
> # env LOCALBASE=/tmp/localbase BUILDDIR=/tmp/builddir ./ports-union-builder.sh
Is your /tmp big enough?
> This will try build everything for x11/xorg.
> Is it possible that VirtualBox is interfering in getting usable diagnostics
> for -9
Who knows? You might try posting your shell script so others can give
it a whirl on a "real" 9-current system.
> and how can I setup a dump device for -8. Currently I have:
> # swapinfo
> Device 1K-blocks Used Avail Capacity
> /dev/ad4s1b 8388608 0 8388608 0%
> /dev/ad8s1b 8388608 0 8388608 0%
> Total 16777216 0 16777216 0%
Do you have dumpdev defined in /etc/rc.conf and/or do you see
/dev/dumpdev? Having /dev/dumpdev indicates that dumpon succeeded.
Do you have less than 8GB of memory? See dumpon(8) for restrictions.
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