I'm currently playing around with native btrfs multi-device support in systemd. There might be a few "hotplug issues" to solve, here is the first one:
A mounted (otherwise unused) multi-device volume (USB multi-slot card reader), hangs at: $ umount /mnt with (fedora) kernel 3.6.0-0.rc5.git0.1.fc18.x86_64 Any idea what to look for or what to try? Thanks, Kay [ 469.037785] umount D ffff88011e253cc0 0 1403 1389 0x00000000 [ 469.037790] ffff880090ecf818 0000000000000082 ffff8800ccc3c530 ffff880090ecffd8 [ 469.037796] ffff880090ecffd8 ffff880090ecffd8 ffff8801172d9710 ffff8800ccc3c530 [ 469.037801] ffff880090ecf818 ffff8800ccc3c530 ffff88011e254560 0000000000000002 [ 469.037807] Call Trace: [ 469.037814] [<ffffffff8112a830>] ? __lock_page+0x70/0x70 [ 469.037819] [<ffffffff8161e899>] schedule+0x29/0x70 [ 469.037824] [<ffffffff8161e96f>] io_schedule+0x8f/0xd0 [ 469.037831] [<ffffffff8112a83e>] sleep_on_page+0xe/0x20 [ 469.037838] [<ffffffff8161d130>] __wait_on_bit+0x60/0x90 [ 469.037845] [<ffffffff8112a970>] wait_on_page_bit+0x80/0x90 [ 469.037851] [<ffffffff8107f660>] ? autoremove_wake_function+0x50/0x50 [ 469.037858] [<ffffffff8112af21>] filemap_fdatawait_range+0x101/0x190 [ 469.037889] [<ffffffffa057e4d8>] btrfs_wait_ordered_range+0x68/0x120 [btrfs] [ 469.037919] [<ffffffffa059f412>] __btrfs_write_out_cache+0x772/0x990 [btrfs] [ 469.037942] [<ffffffffa05573ce>] ? run_clustered_refs+0x1be/0xb50 [btrfs] [ 469.037972] [<ffffffffa05a5278>] ? btrfs_find_ref_cluster+0x68/0x170 [btrfs] [ 469.037999] [<ffffffffa059f6e1>] btrfs_write_out_cache+0xb1/0xf0 [btrfs] [ 469.038021] [<ffffffffa055854f>] btrfs_write_dirty_block_groups+0x50f/0x5e0 [btrfs] [ 469.038043] [<ffffffffa0557f01>] ? btrfs_run_delayed_refs+0x1a1/0x2e0 [btrfs] [ 469.038072] [<ffffffffa05c2dd0>] commit_cowonly_roots+0x121/0x1eb [btrfs] [ 469.038099] [<ffffffffa0569aad>] btrfs_commit_transaction+0x59d/0xac0 [btrfs] [ 469.038105] [<ffffffff8107f610>] ? wake_up_bit+0x40/0x40 [ 469.038134] [<ffffffffa05b4d46>] ? __btrfs_scrub_cancel+0x106/0x110 [btrfs] [ 469.038160] [<ffffffffa0564aa6>] btrfs_commit_super+0x86/0x110 [btrfs] [ 469.038185] [<ffffffffa0566358>] close_ctree+0x2c8/0x320 [btrfs] [ 469.038191] [<ffffffff811aa067>] ? evict_inodes+0xb7/0x100 [ 469.038208] [<ffffffffa053d4b9>] btrfs_put_super+0x19/0x20 [btrfs] [ 469.038215] [<ffffffff81191611>] generic_shutdown_super+0x61/0xe0 [ 469.038222] [<ffffffff81191726>] kill_anon_super+0x16/0x30 [ 469.038239] [<ffffffffa054134a>] btrfs_kill_super+0x1a/0x90 [btrfs] [ 469.038246] [<ffffffff81191aa7>] deactivate_locked_super+0x57/0x90 [ 469.038252] [<ffffffff8119265e>] deactivate_super+0x4e/0x70 [ 469.038260] [<ffffffff811acf37>] mntput_no_expire+0xd7/0x130 [ 469.038267] [<ffffffff811adf16>] sys_umount+0x76/0x390 [ 469.038273] [<ffffffff81627969>] system_call_fastpath+0x16/0x1b -- 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
