diff options
| author |   Chris Mason <clm@fb.com> | 2015-07-02 13:57:22 -0700 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2015-08-09 07:35:06 -0700 |
| commit | da2f0f74cf7d074e5a8918c8efdf6aba4a989b4a (patch) | |
| tree | 3a2cf977b893863ce5938132a802804a56291f05 /fs/btrfs/disk-io.c | |
| parent | Btrfs: remove unused mutex from struct 'btrfs_fs_info' (diff) | |
| download | linux-dev-da2f0f74cf7d074e5a8918c8efdf6aba4a989b4a.tar.xz linux-dev-da2f0f74cf7d074e5a8918c8efdf6aba4a989b4a.zip | |
Btrfs: add support for blkio controllers
This attaches accounting information to bios as we submit them so the
new blkio controllers can throttle on btrfs filesystems.
Not much is required, we're just associating bios with blkcgs during clone,
calling wbc_init_bio()/wbc_account_io() during writepages submission,
and attaching the bios to the current context during direct IO.
Finally if we are splitting bios during btrfs_map_bio, this attaches
accounting information to the split.
The end result is able to throttle nicely on single disk filesystems. A
little more work is required for multi-device filesystems.
Signed-off-by: Chris Mason <clm@fb.com>
Diffstat (limited to 'fs/btrfs/disk-io.c')
| -rw-r--r-- | fs/btrfs/disk-io.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index f7536bcf7cee..230546b45474 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -1724,6 +1724,7 @@ static int setup_bdi(struct btrfs_fs_info *info, struct backing_dev_info *bdi) bdi->ra_pages = VM_MAX_READAHEAD * 1024 / PAGE_CACHE_SIZE; bdi->congested_fn = btrfs_congested_fn; bdi->congested_data = info; + bdi->capabilities |= BDI_CAP_CGROUP_WRITEBACK; return 0; } |