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| author | Josef Bacik <josef@toxicpanda.com> | 2022-03-29 01:56:06 -0700 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2022-05-16 17:03:11 +0200 |
| commit | bb5a098d9791f184899499531ff4411089e2a5e0 (patch) | |
| tree | 2fd6a2374e9fcd2f10ff674a6698f0580d6a6a64 /fs/btrfs/sysfs.c | |
| parent | a7bb6bd4bd7ff0440f238deb3510a1037a26f7bc (diff) | |
| download | linux-bb5a098d9791f184899499531ff4411089e2a5e0.tar.gz | |
btrfs: make the bg_reclaim_threshold per-space info
For non-zoned file systems it's useful to have the auto reclaim feature, however there are different use cases for non-zoned, for example we may not want to reclaim metadata chunks ever, only data chunks. Move this sysfs flag to per-space_info. This won't affect current users because this tunable only ever did anything for zoned, and that is currently hidden behind BTRFS_CONFIG_DEBUG. Tested-by: Pankaj Raghav <p.raghav@samsung.com> Signed-off-by: Josef Bacik <josef@toxicpanda.com> [ jth restore global bg_reclaim_threshold ] Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> 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 | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index d74233045b14..b9fdb220ed2b 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -720,6 +720,42 @@ SPACE_INFO_ATTR(bytes_zone_unusable); SPACE_INFO_ATTR(disk_used); SPACE_INFO_ATTR(disk_total); +static ssize_t btrfs_sinfo_bg_reclaim_threshold_show(struct kobject *kobj, + struct kobj_attribute *a, + char *buf) +{ + struct btrfs_space_info *space_info = to_space_info(kobj); + ssize_t ret; + + ret = sysfs_emit(buf, "%d\n", READ_ONCE(space_info->bg_reclaim_threshold)); + + return ret; +} + +static ssize_t btrfs_sinfo_bg_reclaim_threshold_store(struct kobject *kobj, + struct kobj_attribute *a, + const char *buf, size_t len) +{ + struct btrfs_space_info *space_info = to_space_info(kobj); + int thresh; + int ret; + + ret = kstrtoint(buf, 10, &thresh); + if (ret) + return ret; + + if (thresh != 0 && (thresh <= 50 || thresh > 100)) + return -EINVAL; + + WRITE_ONCE(space_info->bg_reclaim_threshold, thresh); + + return len; +} + +BTRFS_ATTR_RW(space_info, bg_reclaim_threshold, + btrfs_sinfo_bg_reclaim_threshold_show, + btrfs_sinfo_bg_reclaim_threshold_store); + /* * Allocation information about block group types. * @@ -736,6 +772,7 @@ static struct attribute *space_info_attrs[] = { BTRFS_ATTR_PTR(space_info, bytes_zone_unusable), BTRFS_ATTR_PTR(space_info, disk_used), BTRFS_ATTR_PTR(space_info, disk_total), + BTRFS_ATTR_PTR(space_info, bg_reclaim_threshold), NULL, }; ATTRIBUTE_GROUPS(space_info); |