This warning in btrfs was thrown in cosd's context. Has this been seen? Maybe this needs to go to the btrfs list...? ----- [156155.871399] WARNING: at /build/buildd/linux-2.6.35/fs/btrfs/inode.c:2116 btrfs_orphan_commit_root+0xb0/0xc0 [btrfs]() [156155.871402] Hardware name: H8DMR-82 [156155.871404] Modules linked in: btrfs zlib_deflate crc32c libcrc32c nfsd exportfs nfs lockd fscache nfs_acl auth_rpcgss sunrpc radeon ttm ib_mthca drm_kms_helper ib_mad joydev amd64_edac_mod drm ib_core psmouse i2c_algo_bit shpchp serio_raw k8temp edac_core edac_mce_amd i2c_nforce2 lp parport usbhid hid floppy e1000 pata_amd sata_nv forcedeth [156155.871436] Pid: 23113, comm: cosd Not tainted 2.6.35-22-server #33-Ubuntu [156155.871438] Call Trace: [156155.871447] [<ffffffff8106080f>] warn_slowpath_common+0x7f/0xc0 [156155.871451] [<ffffffff8106086a>] warn_slowpath_null+0x1a/0x20 [156155.871464] [<ffffffffa03e2990>] btrfs_orphan_commit_root+0xb0/0xc0 [btrfs] [156155.871476] [<ffffffffa03de691>] commit_fs_roots+0xa1/0x140 [btrfs] [156155.871488] [<ffffffffa03df8f8>] btrfs_commit_transaction+0x2e8/0x6f0 [btrfs] [156155.871500] [<ffffffffa03cecf6>] ? btrfs_trans_reserve_metadata+0x66/0xa0 [btrfs] [156155.871504] [<ffffffff8107f080>] ? autoremove_wake_function+0x0/0x40 [156155.871517] [<ffffffffa040cafd>] create_snapshot+0xed/0x150 [btrfs] [156155.871529] [<ffffffffa040cca2>] btrfs_mksubvol+0x142/0x200 [btrfs] [156155.871541] [<ffffffffa040ce73>] btrfs_ioctl_snap_create+0x113/0x160 [btrfs] [156155.871553] [<ffffffffa040e43a>] btrfs_ioctl+0x2ea/0x4b0 [btrfs] [156155.871558] [<ffffffff81090a62>] ? futex_wake+0x112/0x130 [156155.871563] [<ffffffff81083894>] ? hrtimer_start_range_ns+0x14/0x20 [156155.871567] [<ffffffff81162e1d>] vfs_ioctl+0x3d/0xd0 [156155.871570] [<ffffffff811635b1>] do_vfs_ioctl+0x81/0x3d0 [156155.871574] [<ffffffff81152f42>] ? vfs_write+0x132/0x1a0 [156155.871577] [<ffffffff81163981>] sys_ioctl+0x81/0xa0 [156155.871582] [<ffffffff8100a0f2>] system_call_fastpath+0x16/0x1b -- 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