I'm running the latest git kernel with the btrfs updates already merged. Today I've hit the following warnings during rsnapshot backup: Jun 1 22:26:30 x4 kernel: Adding 1953788k swap on /dev/sda2. Priority:-1 extents:1 across:1953788k Jun 2 01:52:30 x4 kernel: ------------[ cut here ]------------ Jun 2 01:52:30 x4 kernel: WARNING: at fs/btrfs/extent_map.c:226 unpin_extent_cache+0x4b/0xa0() Jun 2 01:52:30 x4 kernel: Hardware name: System Product Name Jun 2 01:52:30 x4 kernel: Pid: 24991, comm: btrfs-endio-wri Not tainted 3.4.0-09820-g86c47b7-dirty #50 Jun 2 01:52:30 x4 kernel: Call Trace: Jun 2 01:52:30 x4 kernel: [<ffffffff8105c6c0>] ? warn_slowpath_common+0x60/0xa0 Jun 2 01:52:30 x4 kernel: [<ffffffff8121d6eb>] ? unpin_extent_cache+0x4b/0xa0 Jun 2 01:52:30 x4 kernel: [<ffffffff8121207e>] ? btrfs_finish_ordered_io+0x27e/0x400 Jun 2 01:52:30 x4 kernel: [<ffffffff8123bb02>] ? worker_loop+0x142/0x4c0 Jun 2 01:52:30 x4 kernel: [<ffffffff8123b9c0>] ? btrfs_queue_worker+0x300/0x300 Jun 2 01:52:30 x4 kernel: [<ffffffff81077ae5>] ? kthread+0x85/0xa0 Jun 2 01:52:30 x4 kernel: [<ffffffff81561c54>] ? kernel_thread_helper+0x4/0x10 Jun 2 01:52:30 x4 kernel: [<ffffffff81077a60>] ? kthread_flush_work_fn+0x20/0x20 Jun 2 01:52:30 x4 kernel: [<ffffffff81561c50>] ? gs_change+0xb/0xb Jun 2 01:52:30 x4 kernel: ---[ end trace 73bddc9623dbf3c3 ]--- ... Jun 2 01:55:27 x4 kernel: ------------[ cut here ]------------ Jun 2 01:55:27 x4 kernel: WARNING: at fs/btrfs/extent_map.c:226 unpin_extent_cache+0x4b/0xa0() Jun 2 01:55:27 x4 kernel: Hardware name: System Product Name Jun 2 01:55:27 x4 kernel: Pid: 24997, comm: btrfs-endio-wri Tainted: G W 3.4.0-09820-g86c47b7-dirty #50 Jun 2 01:55:27 x4 kernel: Call Trace: Jun 2 01:55:27 x4 kernel: [<ffffffff8105c6c0>] ? warn_slowpath_common+0x60/0xa0 Jun 2 01:55:27 x4 kernel: [<ffffffff8121d6eb>] ? unpin_extent_cache+0x4b/0xa0 Jun 2 01:55:27 x4 kernel: [<ffffffff8121207e>] ? btrfs_finish_ordered_io+0x27e/0x400 Jun 2 01:55:27 x4 kernel: [<ffffffff8123bb02>] ? worker_loop+0x142/0x4c0 Jun 2 01:55:27 x4 kernel: [<ffffffff8123b9c0>] ? btrfs_queue_worker+0x300/0x300 Jun 2 01:55:27 x4 kernel: [<ffffffff81077ae5>] ? kthread+0x85/0xa0 Jun 2 01:55:27 x4 kernel: [<ffffffff81561c54>] ? kernel_thread_helper+0x4/0x10 Jun 2 01:55:27 x4 kernel: [<ffffffff81077a60>] ? kthread_flush_work_fn+0x20/0x20 Jun 2 01:55:27 x4 kernel: [<ffffffff81561c50>] ? gs_change+0xb/0xb Jun 2 01:55:27 x4 kernel: ---[ end trace 73bddc9623dbf3eb ]--- ~ # < /var/log/kern.log | grep extent_map | wc -l 41 >From /var/log/cron.log Jun 2 01:52:00 x4 fcron[24821]: Job /usr/bin/rsnapshot daily started for user root (pid 24822) Jun 2 01:55:29 x4 fcron[24821]: Job /usr/bin/rsnapshot daily completed (mailing output) ~ # btrfs fi df /var Data, RAID1: total=758.00GB, used=538.32GB Data: total=8.00MB, used=0.00 System, RAID1: total=8.00MB, used=116.00KB System: total=4.00MB, used=0.00 Metadata, RAID1: total=37.50GB, used=1.88GB Metadata: total=8.00MB, used=0.00 ~ # btrfs subvol list /var ID 773 top level 5 path .snapshots/daily.0 ID 800 top level 5 path .snapshots/monthly.0 ID 811 top level 5 path .snapshots/weekly.3 ID 813 top level 5 path .snapshots/weekly.2 ID 839 top level 5 path .snapshots/weekly.1 ID 870 top level 5 path .snapshots/weekly.0 ID 871 top level 5 path .snapshots/daily.6 ID 872 top level 5 path .snapshots/daily.5 ID 873 top level 5 path .snapshots/daily.4 ID 874 top level 5 path .snapshots/daily.3 ID 875 top level 5 path .snapshots/daily.2 ID 876 top level 5 path .snapshots/daily.1 Rsnapshot creates a new snapshot with: btrfs subvolume snapshot -r and then uses rsync to backup my root drive (on xfs). -- Markus -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
