[ 16.154325] fedora kernel: BTRFS info (device dm-0): start tree-log replay
[ 16.343179] fedora kernel: BTRFS: error (device dm-0) in btrfs_replay_log:2080: errno=-5 IO failure (Failed to recover log tree)
It seems that you’re experiencing the same issue as this user, problem with the log tree.
zero-log
clear the filesystem log tree
This command will clear the filesystem log tree. This may fix a specific set of problem when the filesystem mount fails due to the log replay. See below for sample stack traces that may show up in system log.
The common case where this happens was fixed a long time ago, so it is unlikely that you will see this particular problem, but the command is kept around.
Note
Clearing the log may lead to loss of changes that were made since the last transaction commit. This may be up to 30 seconds (default commit period) or less if the commit was implied by other filesystem activity.
One can determine whether zero-log is needed according to the kernel backtrace:
? replay_one_dir_item+0xb5/0xb5 [btrfs] ? walk_log_tree+0x9c/0x19d [btrfs] ? btrfs_read_fs_root_no_radix+0x169/0x1a1 [btrfs] ? btrfs_recover_log_trees+0x195/0x29c [btrfs] ? replay_one_dir_item+0xb5/0xb5 [btrfs] ? btree_read_extent_buffer_pages+0x76/0xbc [btrfs] ? open_ctree+0xff6/0x132c [btrfs]
If the errors are like above, then zero-log should be used to clear the log and the filesystem may be mounted normally again. The keywords to look for are ‘open_ctree’ which says that it’s during mount and function names that contain replay, recover or log_tree.