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btrfs: sysfs: relax bg_reclaim_threshold for debugging purposes

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Currently, /sys/fs/btrfs/<UUID>/bg_reclaim_threshold is limited to 0
(disable) or [50 .. 100]%, so we need to fill 50% of a device to start the
auto reclaim process. It is cumbersome to do so when we want to shake out
possible race issues of normal write vs reclaim.

Relax the threshold check under the BTRFS_DEBUG option.

Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Naohiro Aota 2023-03-13 16:46:54 +09:00 committed by David Sterba
parent 2cef0c79bb
commit d1cc579383
1 changed files with 5 additions and 0 deletions
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5
fs/btrfs/sysfs.c
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@ -1262,8 +1262,13 @@ static ssize_t btrfs_bg_reclaim_threshold_store(struct kobject *kobj,
if (ret)
return ret;
#ifdef CONFIG_BTRFS_DEBUG
if (thresh != 0 && (thresh > 100))
return -EINVAL;
#else
if (thresh != 0 && (thresh <= 50 || thresh > 100))
return -EINVAL;
#endif
WRITE_ONCE(fs_info->bg_reclaim_threshold, thresh);