diff options
Diffstat (limited to 'fs/btrfs/discard.c')
| -rw-r--r-- | fs/btrfs/discard.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/fs/btrfs/discard.c b/fs/btrfs/discard.c index cb9a23217ec6..99663641abf4 100644 --- a/fs/btrfs/discard.c +++ b/fs/btrfs/discard.c @@ -343,6 +343,35 @@ bool btrfs_run_discard_work(struct btrfs_discard_ctl *discard_ctl) } /** + * btrfs_discard_update_discardable - propagate discard counters + * @block_group: block_group of interest + * @ctl: free_space_ctl of @block_group + * + * This propagates deltas of counters up to the discard_ctl. It maintains a + * current counter and a previous counter passing the delta up to the global + * stat. Then the current counter value becomes the previous counter value. + */ +void btrfs_discard_update_discardable(struct btrfs_block_group *block_group, + struct btrfs_free_space_ctl *ctl) +{ + struct btrfs_discard_ctl *discard_ctl; + s32 extents_delta; + + if (!block_group || !btrfs_test_opt(block_group->fs_info, DISCARD_ASYNC)) + return; + + discard_ctl = &block_group->fs_info->discard_ctl; + + extents_delta = ctl->discardable_extents[BTRFS_STAT_CURR] - + ctl->discardable_extents[BTRFS_STAT_PREV]; + if (extents_delta) { + atomic_add(extents_delta, &discard_ctl->discardable_extents); + ctl->discardable_extents[BTRFS_STAT_PREV] = + ctl->discardable_extents[BTRFS_STAT_CURR]; + } +} + +/** * btrfs_discard_punt_unused_bgs_list - punt unused_bgs list to discard lists * @fs_info: fs_info of interest * @@ -423,6 +452,8 @@ void btrfs_discard_init(struct btrfs_fs_info *fs_info) for (i = 0; i < BTRFS_NR_DISCARD_LISTS; i++) INIT_LIST_HEAD(&discard_ctl->discard_list[i]); + + atomic_set(&discard_ctl->discardable_extents, 0); } void btrfs_discard_cleanup(struct btrfs_fs_info *fs_info) |