Hi, I've seen this too (and other problems with SU+J and snapshots) and was able to reproduce it fairly easy. I wrote a PR:
http://www.freebsd.org/cgi/query-pr.cgi?pr=163310 Never received any feedback until now... On Mon, 2 Jan 2012 23:27:57 -0600 Bryce Edwards <[email protected]> wrote: > I have a RELENG_9 machine that hangs when a snapshot is created on the > root fs (UFS, with SU+J). More accurately, all the processes show a > state of "suspfs" (with ^T) and no fs activity is completed from then > on. A hard reboot (power cycle) was the only way to proceed. > > Here's some reference info - let me know what else I should provide. > > $uname -a > FreeBSD xxx.xxx.net 9.0-PRERELEASE FreeBSD 9.0-PRERELEASE #0: Sun Dec > 25 05:04:37 UTC 2011 [email protected]:/usr/obj/usr/src/sys/GENERIC > amd64 > > csup was run just before build[world|kernel] so you have reference on > the version information. > > $mount > /dev/gpt/root on / (ufs, local, journaled soft-updates) > devfs on /dev (devfs, local, multilabel) > linprocfs on /compat/linux/proc (linprocfs, local) > { zfs info removed } > > $df -h > Filesystem Size Used Avail Capacity Mounted on > /dev/gpt/root 454G 9.1G 409G 2% / > devfs 1.0k 1.0k 0B 100% /dev > linprocfs 4.0k 4.0k 0B 100% /compat/linux/proc > { zfs info removed } > > After the hard reset, there was a snapshot file listed in /.snap and > it was ~465 GB, iirc. Unfortunately, I needed to get things going > again so I was not able to debug or diagnose further. I may be able > to schedule a time that I could recreate the issue and diagnose > better, but I wanted to get your input on what data points and/or > command you would be interested in. > > Thanks in advance, > > Bryce > _______________________________________________ > [email protected] mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "[email protected]" > -- Homepage: www.yamagi.org XMPP: [email protected] GnuPG/GPG: 0xEFBCCBCB
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