diff options
| author |   Dennis Zhou <dennis@kernel.org> | 2019-12-13 16:22:20 -0800 |
|---|---|---|
| committer |   David Sterba <dsterba@suse.com> | 2020-01-20 16:40:58 +0100 |
| commit | dfb79ddb130e0a239e3e90aaf5f5b908555f52bb (patch) | |
| tree | 9f21dfa02d5a64a860e4cc392b534c2720785950 /fs/btrfs/discard.h | |
| parent | btrfs: sysfs: add UUID/debug/discard directory (diff) | |
| download | linux-dev-dfb79ddb130e0a239e3e90aaf5f5b908555f52bb.tar.xz linux-dev-dfb79ddb130e0a239e3e90aaf5f5b908555f52bb.zip | |
btrfs: track discardable extents for async discard
The number of discardable extents will serve as the rate limiting metric
for how often we should discard. This keeps track of discardable extents
in the free space caches by maintaining deltas and propagating them to
the global count.
The deltas are calculated from 2 values stored in PREV and CURR entries,
then propagated up to the global discard ctl. The current counter value
becomes the previous counter value after update.
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: David Sterba <dsterba@suse.com>
[ update changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/discard.h')
| -rw-r--r-- | fs/btrfs/discard.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/btrfs/discard.h b/fs/btrfs/discard.h index 3c5a04f8714f..0f2f89b1b0b9 100644 --- a/fs/btrfs/discard.h +++ b/fs/btrfs/discard.h @@ -16,6 +16,10 @@ void btrfs_discard_schedule_work(struct btrfs_discard_ctl *discard_ctl, bool override); bool btrfs_run_discard_work(struct btrfs_discard_ctl *discard_ctl); +/* Update operations */ +void btrfs_discard_update_discardable(struct btrfs_block_group *block_group, + struct btrfs_free_space_ctl *ctl); + /* Setup/cleanup operations */ void btrfs_discard_punt_unused_bgs_list(struct btrfs_fs_info *fs_info); void btrfs_discard_resume(struct btrfs_fs_info *fs_info); |