Date: Wed, 20 Jan 2010 16:28:21 +0100 From: Gary Jennejohn <gary.jennejohn@freenet.de> To: David Naylor <naylor.b.david@gmail.com> Cc: freebsd-current@freebsd.org Subject: Re: stacked unionfs freeze and crash FreeBSD Message-ID: <20100120162821.3f53af6a@ernst.jennejohn.org> In-Reply-To: <201001201543.15818.naylor.b.david@gmail.com> References: <201001201543.15818.naylor.b.david@gmail.com>
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On Wed, 20 Jan 2010 15:43:12 +0200 David Naylor <naylor.b.david@gmail.com> wrote: > Hi, > > 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 > rip-0xffffffff81e4c1 > rsp=0xffffff80b133ef50 > rbp=0xffffff80b133f150 > 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 > native). > > A LOR is produces prior to freezing under -9 (quiet a time prior). See > kern/141950. > > 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. --- Gary Jennejohn
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