From: Darrick J. Wong <djwong@xxxxxxxxxx> Christoph requested a blurb somewhere explaining exactly what LARP means. I don't know of a good place other than the source code (debug knobs aren't covered in Documentation/), so here it is. Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx> Reviewed-by: Christoph Hellwig <hch@xxxxxx> --- fs/xfs/xfs_sysfs.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/fs/xfs/xfs_sysfs.c b/fs/xfs/xfs_sysfs.c index a3c6b1548723..871f16a4a5d8 100644 --- a/fs/xfs/xfs_sysfs.c +++ b/fs/xfs/xfs_sysfs.c @@ -229,6 +229,15 @@ pwork_threads_show( } XFS_SYSFS_ATTR_RW(pwork_threads); +/* + * The "LARP" (Logged extended Attribute Recovery Persistence) debugging knob + * sets the XFS_DA_OP_LOGGED flag on all xfs_attr_set operations performed on + * V5 filesystems. As a result, the intermediate progress of all setxattr and + * removexattr operations are tracked via the log and can be restarted during + * recovery. This is useful for testing xattr recovery prior to merging of the + * parent pointer feature which requires it to maintain consistency, and may be + * enabled for userspace xattrs in the future. + */ static ssize_t larp_store( struct kobject *kobject,
