On Mon, May 23, 2022 at 08:54:04AM +1000, Dave Chinner wrote: > On Sun, May 22, 2022 at 08:28:30AM -0700, Darrick J. Wong wrote: > > From: Darrick J. Wong <djwong@xxxxxxxxxx> > > > > Since LARP is an experimental debug-only feature, we should try to warn > > about it being in use once per day, not once per reboot. > > > > Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx> > > --- > > fs/xfs/xfs_log.c | 4 ++-- > > 1 file changed, 2 insertions(+), 2 deletions(-) > > > > > > diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c > > index 9dc748abdf33..edd077e055d5 100644 > > --- a/fs/xfs/xfs_log.c > > +++ b/fs/xfs/xfs_log.c > > @@ -3910,8 +3910,8 @@ xfs_attr_use_log_assist( > > if (error) > > goto drop_incompat; > > > > - xfs_warn_once(mp, > > -"EXPERIMENTAL logged extended attributes feature added. Use at your own risk!"); > > + xfs_warn_daily(mp, > > + "EXPERIMENTAL logged extended attributes feature added. Use at your own risk!"); > > I think even this is wrong. We need this to warn once per *mount* > like we do with all other experimental features, not once or once > per day. i.e. we could have 10 filesystems mounted and only one of > them will warn that EXPERIMENTAL features are in use. > > We really need all filesystems that use an experimental feature to > warn about the use of said feature, not just a single filesystem. > That will make this consistent with the way we warn once (and once > only) at mount time about EXPERIMENTAL features that are enabled at > mount time... Ok. I was thinking we could have an unsigned long m_warned then all we'd need to do is convert the existing three callers (scrub, shrink, larp) to something like: if (!test_and_set_bit(XFS_WARNED_FUBAR, &mp->m_warned)) xfs_warn(mp, "EXPERIMENTAL fubar feature is enabled, use at your own risk!"); Also, any thoughts on the last two patches? --D > Cheers, > > Dave. > -- > Dave Chinner > david@xxxxxxxxxxxxx
