Hello developers - Last chance to get more details on this btrfs hang (below) before I reboot the machine. Anything I can do to gather more data?
Linux linux 2.6.35-23-generic #40-Ubuntu SMP Wed Nov 17 22:14:33 UTC 2010 x86_64 GNU/Linux Description: Ubuntu 10.10 Package: btrfs-tools Status: install ok installed Priority: optional Section: admin Installed-Size: 1408 Maintainer: Ubuntu Developers <ubuntu-devel-disc...@lists.ubuntu.com> Architecture: amd64 Version: 0.19+20100601-3 Depends: e2fslibs (>= 1.37), libc6 (>= 2.7), libcomerr2 (>= 1.01), libuuid1 (>= 2.16), zlib1g (>= 1:1.2.0) Original-Maintainer: Daniel Baumann <dan...@lists.debian-maintainers.org> Homepage: http://btrfs.wiki.kernel.org/ On Wed, Dec 08, 2010 at 09:01:02AM -0500, Ian! D. Allen wrote: > I've been exercising btrfs doing a continuous loop of: > > - delete an old snapshot to keep disk space about the same > - create snapshot from previous snapshot > - rsync root into new snapshot > > I have room for 150 snapshots on disk. I delete the oldest, create > the newest, do the rsync into the newest, repeat. It hung today on > snapshot 564: > > $ ps uww 24575 > USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND > root 24575 0.0 0.0 6224 332 pts/10 DN 07:35 0:00 btrfs > subvolume snapshot /mnt/sde1/snap564 /mnt/sde1/snap565 > > $ ps lww 24575 > F UID PID PPID PRI NI VSZ RSS WCHAN STAT TTY TIME COMMAND > 4 0 24575 27716 35 - 6224 332 btrfs_ DN pts/10 0:00 btrfs > subvolume snapshot /mnt/sde1/snap564 /mnt/sde1/snap565 > > $ ps -o wchan 24575 > WCHAN > btrfs_commit_transaction > > No messages in "dmesg" or kernel log. Anyone want me to run some other > debug tests to find out what is wrong? Anything that tries to access > anything inside the btrfs file system /dev/sde1 hangs uninterruptably: > > 1 0 1863 2 20 0 0 0 wait_f D ? 0:29 > [btrfs-transacti] > 4 0 4933 4925 20 0 26524 2864 lookup D+ pts/10 0:02 /bin/bash > 1 777 27995 7318 20 0 26576 1784 vfs_re D+ pts/52 0:00 bash > 0 777 29395 7284 20 0 21856 688 vfs_re D pts/51 0:00 ls -abp > --color=auto /mnt/sde1 > 0 777 29510 7284 20 0 21856 692 vfs_re D pts/51 0:00 /bin/ls > /mnt/sde1 > > $ ps -o wchan 1863 > WCHAN > wait_for_commit > > $ ps -o wchan 27995 > WCHAN > vfs_readdir -- | Ian! D. Allen - idal...@idallen.ca - Ottawa, Ontario, Canada | Home Page: http://idallen.com/ Contact Improv: http://contactimprov.ca/ | College professor (Free/Libre GNU+Linux) at: http://teaching.idallen.com/ | Defend digital freedom: http://eff.org/ and have fun: http://fools.ca/ -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
