From 3687fcb0752ac9c4630b4aeb5362c6e6f81c528e Mon Sep 17 00:00:00 2001 From: Johannes Thumshirn Date: Tue, 29 Mar 2022 01:56:09 -0700 Subject: btrfs: zoned: make auto-reclaim less aggressive The current auto-reclaim algorithm starts reclaiming all block groups with a zone_unusable value above a configured threshold. This is causing a lot of reclaim IO even if there would be enough free zones on the device. Instead of only accounting a block groups zone_unusable value, also take the ratio of free and not usable (written as well as zone_unusable) bytes a device has into account. Tested-by: Pankaj Raghav Signed-off-by: Johannes Thumshirn Signed-off-by: David Sterba --- fs/btrfs/zoned.h | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'fs/btrfs/zoned.h') diff --git a/fs/btrfs/zoned.h b/fs/btrfs/zoned.h index 12aaaccf2998..de923fc8449d 100644 --- a/fs/btrfs/zoned.h +++ b/fs/btrfs/zoned.h @@ -74,6 +74,7 @@ void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, u64 logical, u64 length); void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg); void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info); +bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info); #else /* CONFIG_BLK_DEV_ZONED */ static inline int btrfs_get_dev_zone(struct btrfs_device *device, u64 pos, struct blk_zone *zone) @@ -232,6 +233,11 @@ static inline void btrfs_zone_finish_endio(struct btrfs_fs_info *fs_info, static inline void btrfs_clear_data_reloc_bg(struct btrfs_block_group *bg) { } static inline void btrfs_free_zone_cache(struct btrfs_fs_info *fs_info) { } + +static inline bool btrfs_zoned_should_reclaim(struct btrfs_fs_info *fs_info) +{ + return false; +} #endif static inline bool btrfs_dev_is_sequential(struct btrfs_device *device, u64 pos) -- cgit v1.2.3-73-gaa49b