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| author | Dennis Zhou <dennis@kernel.org> | 2020-01-02 16:26:41 -0500 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2020-01-20 16:41:00 +0100 |
| commit | 9ddf648f9c2a492cef4e41e31c50515a817d0562 (patch) | |
| tree | 64ecae153d63e8392660d0e73e5d99391010795b /fs/btrfs/sysfs.c | |
| parent | 5cb0724e1b4653629c508906ca6098bae77d2f95 (diff) | |
| download | lwn-9ddf648f9c2a492cef4e41e31c50515a817d0562.tar.gz lwn-9ddf648f9c2a492cef4e41e31c50515a817d0562.zip | |
btrfs: keep track of discard reuse stats
Keep track of how much we are discarding and how often we are reusing
with async discard. The discard_*_bytes values don't need any special
protection because the work item provides the single threaded access.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'fs/btrfs/sysfs.c')
| -rw-r--r-- | fs/btrfs/sysfs.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index eac0155bf8c7..55e4ed1af29c 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -366,6 +366,39 @@ static ssize_t btrfs_discardable_extents_show(struct kobject *kobj, } BTRFS_ATTR(discard, discardable_extents, btrfs_discardable_extents_show); +static ssize_t btrfs_discard_bitmap_bytes_show(struct kobject *kobj, + struct kobj_attribute *a, + char *buf) +{ + struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj); + + return snprintf(buf, PAGE_SIZE, "%lld\n", + fs_info->discard_ctl.discard_bitmap_bytes); +} +BTRFS_ATTR(discard, discard_bitmap_bytes, btrfs_discard_bitmap_bytes_show); + +static ssize_t btrfs_discard_bytes_saved_show(struct kobject *kobj, + struct kobj_attribute *a, + char *buf) +{ + struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj); + + return snprintf(buf, PAGE_SIZE, "%lld\n", + atomic64_read(&fs_info->discard_ctl.discard_bytes_saved)); +} +BTRFS_ATTR(discard, discard_bytes_saved, btrfs_discard_bytes_saved_show); + +static ssize_t btrfs_discard_extent_bytes_show(struct kobject *kobj, + struct kobj_attribute *a, + char *buf) +{ + struct btrfs_fs_info *fs_info = discard_to_fs_info(kobj); + + return snprintf(buf, PAGE_SIZE, "%lld\n", + fs_info->discard_ctl.discard_extent_bytes); +} +BTRFS_ATTR(discard, discard_extent_bytes, btrfs_discard_extent_bytes_show); + static ssize_t btrfs_discard_iops_limit_show(struct kobject *kobj, struct kobj_attribute *a, char *buf) @@ -459,6 +492,9 @@ BTRFS_ATTR_RW(discard, max_discard_size, btrfs_discard_max_discard_size_show, static const struct attribute *discard_debug_attrs[] = { BTRFS_ATTR_PTR(discard, discardable_bytes), BTRFS_ATTR_PTR(discard, discardable_extents), + BTRFS_ATTR_PTR(discard, discard_bitmap_bytes), + BTRFS_ATTR_PTR(discard, discard_bytes_saved), + BTRFS_ATTR_PTR(discard, discard_extent_bytes), BTRFS_ATTR_PTR(discard, iops_limit), BTRFS_ATTR_PTR(discard, kbps_limit), BTRFS_ATTR_PTR(discard, max_discard_size), |