Commit d1cc5793 authored by Naohiro Aota's avatar Naohiro Aota Committed by David Sterba
Browse files

btrfs: sysfs: relax bg_reclaim_threshold for debugging purposes 



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: default avatarJohannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: default avatarNaohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent 2cef0c79

fs/btrfs/sysfs.c

+5 −0
Original line number Diff line number Diff line
@@ -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);