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| author | Filipe Manana <fdmanana@suse.com> | 2024-04-09 17:07:32 +0100 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2024-05-07 21:31:07 +0200 |
| commit | 0d89a15e1a0dcc861481ee696ec332c998140510 (patch) | |
| tree | 9232a5110f66f31e05b28777d5b670c047deb6fa /fs/btrfs | |
| parent | 65bb9fb00b7012a78b2f5d1cd042bf098900c5d3 (diff) | |
| download | linux-0d89a15e1a0dcc861481ee696ec332c998140510.tar.gz linux-0d89a15e1a0dcc861481ee696ec332c998140510.tar.bz2 linux-0d89a15e1a0dcc861481ee696ec332c998140510.zip | |
btrfs: add tracepoints for extent map shrinker events
Add some tracepoints for the extent map shrinker to help debug and analyse
main events. These have proved useful during development of the shrinker.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs')
| -rw-r--r-- | fs/btrfs/extent_map.c | 13 | ||||
| -rw-r--r-- | fs/btrfs/super.c | 5 |
2 files changed, 17 insertions, 1 deletions
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c index 62a21491c044..744e8952abb0 100644 --- a/fs/btrfs/extent_map.c +++ b/fs/btrfs/extent_map.c @@ -1080,6 +1080,7 @@ static long btrfs_scan_inode(struct btrfs_inode *inode, long *scanned, long nr_t btrfs_set_inode_full_sync(inode); remove_extent_mapping(inode, em); + trace_btrfs_extent_map_shrinker_remove_em(inode, em); /* Drop the reference for the tree. */ free_extent_map(em); nr_dropped++; @@ -1152,6 +1153,12 @@ long btrfs_free_extent_maps(struct btrfs_fs_info *fs_info, long nr_to_scan) long nr_dropped = 0; long scanned = 0; + if (trace_btrfs_extent_map_shrinker_scan_enter_enabled()) { + s64 nr = percpu_counter_sum_positive(&fs_info->evictable_extent_maps); + + trace_btrfs_extent_map_shrinker_scan_enter(fs_info, nr_to_scan, nr); + } + while (scanned < nr_to_scan) { struct btrfs_root *root; unsigned long count; @@ -1184,5 +1191,11 @@ long btrfs_free_extent_maps(struct btrfs_fs_info *fs_info, long nr_to_scan) btrfs_put_root(root); } + if (trace_btrfs_extent_map_shrinker_scan_exit_enabled()) { + s64 nr = percpu_counter_sum_positive(&fs_info->evictable_extent_maps); + + trace_btrfs_extent_map_shrinker_scan_exit(fs_info, nr_dropped, nr); + } + return nr_dropped; } diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index 571f90d18c7f..2dbc930a20f7 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -2374,8 +2374,11 @@ static int btrfs_show_devname(struct seq_file *m, struct dentry *root) static long btrfs_nr_cached_objects(struct super_block *sb, struct shrink_control *sc) { struct btrfs_fs_info *fs_info = btrfs_sb(sb); + const s64 nr = percpu_counter_sum_positive(&fs_info->evictable_extent_maps); - return percpu_counter_sum_positive(&fs_info->evictable_extent_maps); + trace_btrfs_extent_map_shrinker_count(fs_info, nr); + + return nr; } static long btrfs_free_cached_objects(struct super_block *sb, struct shrink_control *sc) |