diff options
| author | Josef Bacik <jbacik@fb.com> | 2014-10-31 16:49:34 +0300 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2014-11-21 04:20:04 +0300 |
| commit | 633c0aad4c0243a506a3e8590551085ad78af82d (patch) | |
| tree | 8cf20fe74c74e70409d4e60c80b65aab1c7f97b5 /fs/btrfs/ctree.h | |
| parent | cd743fac42bbc2e6125ee14aaa8741601f92fe9a (diff) | |
| download | linux-633c0aad4c0243a506a3e8590551085ad78af82d.tar.xz | |
Btrfs: move read only block groups onto their own list V2
Our gluster boxes were spending lots of time in statfs because our fs'es are
huge. The problem is statfs loops through all of the block groups looking for
read only block groups, and when you have several terabytes worth of data that
ends up being a lot of block groups. Move the read only block groups onto a
read only list and only proces that list in
btrfs_account_ro_block_groups_free_space to reduce the amount of churn. Thanks,
Signed-off-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/ctree.h')
| -rw-r--r-- | fs/btrfs/ctree.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index b72b35867a7f..fa14081e3383 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -1170,6 +1170,7 @@ struct btrfs_space_info { struct percpu_counter total_bytes_pinned; struct list_head list; + struct list_head ro_bgs; struct rw_semaphore groups_sem; /* for block groups in our same type */ @@ -1305,6 +1306,9 @@ struct btrfs_block_group_cache { /* For delayed block group creation or deletion of empty block groups */ struct list_head bg_list; + + /* For read-only block groups */ + struct list_head ro_list; }; /* delayed seq elem */ |