2011/12/21 Jens Rehpöhler <jens.rehpoehler@xxxxxxxx>: > Am 19.12.2011 19:51, schrieb Gregory Farnum: >> On Mon, Dec 19, 2011 at 12:28 AM, Jens Rehpöhler >> <jens.rehpoehler@xxxxxxxx> wrote: >>> Good morning !! >>> >>> i got the following warning as soon as i use btrfs as underlaying >>> filesystem (for stability reasons i use ext4). I converted one OSD back >>> to btrfs to give it another try. >>> >>> kernel: 3.2rc6 >>> ceph: ceph/stable uptodate 0.39-9-g37e7a52-1~bpo60+1 >>> dist: debian squeeze >>> >>> [...] >>> >>> Anything to worry about ? >> This doesn't look familiar to me — if you can reproduce it (or maybe >> just provide more detail) the btrfs folks will probably be interested. >> -Greg > > Hi Greg, > > reproduction is possible, if i destroy one osd und start a fresh resync > (actual 550 GB of data). > After a short while i get: > > Dec 20 19:45:22 fcmsnode4 kernel: [170010.477676] ------------[ cut here > ]------------ > Dec 20 19:45:22 fcmsnode4 kernel: [170010.477727] WARNING: at > fs/btrfs/inode.c:1969 btrfs_orphan_commit_root+0x7f/0x9b [btrfs]() > Dec 20 19:45:22 fcmsnode4 kernel: [170010.477772] Hardware name: X8DT3 > Dec 20 19:45:22 fcmsnode4 kernel: [170010.477795] Modules linked in: > zram(C) dm_mod rbd loop aes_x86_64 aes_generic cbc kvm_intel > xt_multiport ext2 iptable_filter ip_tables vhost_net macvtap macvlan tun > brd ebt_arp ebtable_filter ebtables x_tables kvm fuse ceph libceph > bridge stp llc ext4 jbd2 crc16 tpm_tis tpm joydev pcspkr ioatdma > tpm_bios processor i2c_i801 thermal_sys serio_raw button i2c_core evdev > ext3 jbd mbcache btrfs zlib_deflate crc32c libcrc32c sd_mod crc_t10dif > usbhid hid uhci_hcd ehci_hcd usbcore ixgbe 3w_sas mdio usb_common > scsi_mod igb dca [last unloaded: scsi_wait_scan] > Dec 20 19:45:22 fcmsnode4 kernel: [170010.478130] Pid: 6790, comm: > btrfs-transacti Tainted: G WC 3.2.0-rc6 #2 > Dec 20 19:45:22 fcmsnode4 kernel: [170010.478173] Call Trace: > Dec 20 19:45:22 fcmsnode4 kernel: [170010.478199] [<ffffffff81047257>] > ? warn_slowpath_common+0x78/0x8c > Dec 20 19:45:22 fcmsnode4 kernel: [170010.478237] [<ffffffffa011ee22>] > ? btrfs_orphan_commit_root+0x7f/0x9b [btrfs] > Dec 20 19:45:22 fcmsnode4 kernel: [170010.478289] [<ffffffffa01182f3>] > ? commit_fs_roots+0xa2/0x159 [btrfs] > Dec 20 19:45:22 fcmsnode4 kernel: [170010.478332] [<ffffffff810ece7c>] > ? kmem_cache_free+0x12/0x9e > Dec 20 19:45:22 fcmsnode4 kernel: [170010.478377] [<ffffffffa0118fcd>] > ? btrfs_commit_transaction+0x3e2/0x71b [btrfs] > Dec 20 19:45:22 fcmsnode4 kernel: [170010.478423] [<ffffffff81053026>] > ? del_timer_sync+0x34/0x3e > Dec 20 19:45:22 fcmsnode4 kernel: [170010.478453] [<ffffffff81328237>] > ? schedule_timeout+0xa8/0xd7 > Dec 20 19:45:22 fcmsnode4 kernel: [170010.478482] [<ffffffff81060b69>] > ? wake_up_bit+0x20/0x20 > Dec 20 19:45:22 fcmsnode4 kernel: [170010.478517] [<ffffffffa0113c8d>] > ? transaction_kthread+0x173/0x22d [btrfs] > Dec 20 19:45:22 fcmsnode4 kernel: [170010.478560] [<ffffffffa0113b1a>] > ? find_and_setup_root+0xdc/0xdc [btrfs] > Dec 20 19:45:22 fcmsnode4 kernel: [170010.478600] [<ffffffffa0113b1a>] > ? find_and_setup_root+0xdc/0xdc [btrfs] > Dec 20 19:45:22 fcmsnode4 kernel: [170010.478630] [<ffffffff8106072d>] > ? kthread+0x7a/0x82 > Dec 20 19:45:22 fcmsnode4 kernel: [170010.478658] [<ffffffff813316b4>] > ? kernel_thread_helper+0x4/0x10 > Dec 20 19:45:22 fcmsnode4 kernel: [170010.478687] [<ffffffff810606b3>] > ? kthread_worker_fn+0x147/0x147 > Dec 20 19:45:22 fcmsnode4 kernel: [170010.478716] [<ffffffff813316b0>] > ? gs_change+0x13/0x13 > Dec 20 19:45:22 fcmsnode4 kernel: [170010.478742] ---[ end trace > 3b774941bf3fc467 ]--- > Dec 20 19:48:57 fcmsnode4 kernel: [170225.535021] ------------[ cut here > ]------------ > Dec 20 19:48:57 fcmsnode4 kernel: [170225.535072] WARNING: at > fs/btrfs/inode.c:1969 btrfs_orphan_commit_root+0x7f/0x9b [btrfs]() > Dec 20 19:48:57 fcmsnode4 kernel: [170225.535117] Hardware name: X8DT3 > Dec 20 19:48:57 fcmsnode4 kernel: [170225.535139] Modules linked in: > zram(C) dm_mod rbd loop aes_x86_64 aes_generic cbc kvm_intel > xt_multiport ext2 iptable_filter ip_tables vhost_net macvtap macvlan tun > brd ebt_arp ebtable_filter ebtables x_tables kvm fuse ceph libceph > bridge stp llc ext4 jbd2 crc16 tpm_tis tpm joydev pcspkr ioatdma > tpm_bios processor i2c_i801 thermal_sys serio_raw button i2c_core evdev > ext3 jbd mbcache btrfs zlib_deflate crc32c libcrc32c sd_mod crc_t10dif > usbhid hid uhci_hcd ehci_hcd usbcore ixgbe 3w_sas mdio usb_common > scsi_mod igb dca [last unloaded: scsi_wait_scan] > Dec 20 19:48:57 fcmsnode4 kernel: [170225.535471] Pid: 6790, comm: > btrfs-transacti Tainted: G WC 3.2.0-rc6 #2 > Dec 20 19:48:57 fcmsnode4 kernel: [170225.535514] Call Trace: > Dec 20 19:48:57 fcmsnode4 kernel: [170225.535539] [<ffffffff81047257>] > ? warn_slowpath_common+0x78/0x8c > Dec 20 19:48:57 fcmsnode4 kernel: [170225.535577] [<ffffffffa011ee22>] > ? btrfs_orphan_commit_root+0x7f/0x9b [btrfs] > Dec 20 19:48:57 fcmsnode4 kernel: [170225.535629] [<ffffffffa01182f3>] > ? commit_fs_roots+0xa2/0x159 [btrfs] > Dec 20 19:48:57 fcmsnode4 kernel: [170225.535661] [<ffffffff810ece7c>] > ? kmem_cache_free+0x12/0x9e > Dec 20 19:48:57 fcmsnode4 kernel: [170225.535697] [<ffffffffa0118fcd>] > ? btrfs_commit_transaction+0x3e2/0x71b [btrfs] > Dec 20 19:48:57 fcmsnode4 kernel: [170225.535743] [<ffffffff81053026>] > ? del_timer_sync+0x34/0x3e > Dec 20 19:48:57 fcmsnode4 kernel: [170225.535773] [<ffffffff81328237>] > ? schedule_timeout+0xa8/0xd7 > Dec 20 19:48:57 fcmsnode4 kernel: [170225.535803] [<ffffffff81060b69>] > ? wake_up_bit+0x20/0x20 > Dec 20 19:48:57 fcmsnode4 kernel: [170225.535838] [<ffffffffa0113c8d>] > ? transaction_kthread+0x173/0x22d [btrfs] > Dec 20 19:48:57 fcmsnode4 kernel: [170225.535876] [<ffffffffa0113b1a>] > ? find_and_setup_root+0xdc/0xdc [btrfs] > Dec 20 19:48:57 fcmsnode4 kernel: [170225.535914] [<ffffffffa0113b1a>] > ? find_and_setup_root+0xdc/0xdc [btrfs] > Dec 20 19:48:57 fcmsnode4 kernel: [170225.535944] [<ffffffff8106072d>] > ? kthread+0x7a/0x82 > Dec 20 19:48:57 fcmsnode4 kernel: [170225.535971] [<ffffffff813316b4>] > ? kernel_thread_helper+0x4/0x10 > Dec 20 19:48:57 fcmsnode4 kernel: [170225.536000] [<ffffffff810606b3>] > ? kthread_worker_fn+0x147/0x147 > Dec 20 19:48:57 fcmsnode4 kernel: [170225.536028] [<ffffffff813316b0>] > ? gs_change+0x13/0x13 > Dec 20 19:48:57 fcmsnode4 kernel: [170225.536054] ---[ end trace > 3b774941bf3fc468 ]--- > > Seems to me, that this happens if the btrfs is under heavy load. I was thinking that everyone using ceph on btrfs is hitting this WARNING sooner or later. We have seen this a long time ago: http://tracker.newdream.net/issues/563 There were several threads on the btrfs list, but there is no solution yet. Here is one for example: http://comments.gmane.org/gmane.comp.file-systems.btrfs/14193 The good news is, that I haven't experienced any problems that I could relate to this warning. (Which doesn't mean that I am happy with the current state of btrfs). Regards, Christian -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
