diff options
| author | Boris Burkov <boris@bur.io> | 2024-01-25 14:10:30 -0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2024-07-11 15:33:27 +0200 |
| commit | 243192b6764990e7fa0e22ea65b4d12f3294471c (patch) | |
| tree | 38098f9b81ec4cb868f993b165c8849dab006fe1 /fs/btrfs/block-group.c | |
| parent | a5b3abb18c380177d3a994d30a2ab890f27b8df8 (diff) | |
btrfs: report reclaim stats in sysfs
When evaluating various reclaim strategies/thresholds against each
other, it is useful to collect data about the amount of reclaim
happening. Expose a count, error count, and byte count via sysfs
per space_info.
Note that this is only for automatic reclaim, not manually invoked
balances or other codepaths that use "relocate_block_group"
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Boris Burkov <boris@bur.io>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/block-group.c')
| -rw-r--r-- | fs/btrfs/block-group.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/btrfs/block-group.c b/fs/btrfs/block-group.c index db666f9807ea..b530302b469d 100644 --- a/fs/btrfs/block-group.c +++ b/fs/btrfs/block-group.c @@ -1829,6 +1829,7 @@ void btrfs_reclaim_bgs_work(struct work_struct *work) list_sort(NULL, &fs_info->reclaim_bgs, reclaim_bgs_cmp); while (!list_empty(&fs_info->reclaim_bgs)) { u64 zone_unusable; + u64 reclaimed; int ret = 0; bg = list_first_entry(&fs_info->reclaim_bgs, @@ -1921,12 +1922,21 @@ void btrfs_reclaim_bgs_work(struct work_struct *work) div64_u64(bg->used * 100, bg->length), div64_u64(zone_unusable * 100, bg->length)); trace_btrfs_reclaim_block_group(bg); + reclaimed = bg->used; ret = btrfs_relocate_chunk(fs_info, bg->start); if (ret) { btrfs_dec_block_group_ro(bg); btrfs_err(fs_info, "error relocating chunk %llu", bg->start); + reclaimed = 0; + spin_lock(&space_info->lock); + space_info->reclaim_errors++; + spin_unlock(&space_info->lock); } + spin_lock(&space_info->lock); + space_info->reclaim_count++; + space_info->reclaim_bytes += reclaimed; + spin_unlock(&space_info->lock); next: if (ret) { |