diff options
| author | Naohiro Aota <naohiro.aota@wdc.com> | 2022-03-29 15:55:58 +0900 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2022-04-06 00:49:50 +0200 |
| commit | a690e5f2db4d1dca742ce734aaff9f3112d63764 (patch) | |
| tree | 996c090e12c2bbe40b8ecf9f311d5608fae67f4b /fs/btrfs | |
| parent | d03ae0d3b687223de24d3dd1a7bca96034aeca25 (diff) | |
btrfs: mark resumed async balance as writing
When btrfs balance is interrupted with umount, the background balance
resumes on the next mount. There is a potential deadlock with FS freezing
here like as described in commit 26559780b953 ("btrfs: zoned: mark
relocation as writing"). Mark the process as sb_writing to avoid it.
Reviewed-by: Filipe Manana <fdmanana@suse.com>
CC: stable@vger.kernel.org # 4.9+
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/volumes.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 2cfbc74a3b4e..a8cc736731fd 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -4430,10 +4430,12 @@ static int balance_kthread(void *data) struct btrfs_fs_info *fs_info = data; int ret = 0; + sb_start_write(fs_info->sb); mutex_lock(&fs_info->balance_mutex); if (fs_info->balance_ctl) ret = btrfs_balance(fs_info, fs_info->balance_ctl, NULL); mutex_unlock(&fs_info->balance_mutex); + sb_end_write(fs_info->sb); return ret; } |