On Tue, Mar 12, 2024 at 07:10:45PM -0700, Darrick J. Wong wrote: > From: Darrick J. Wong <djwong@xxxxxxxxxx> > > Adjust the lowspace threshold in the new btree block slack computation > code to match online repair, which uses a straight 10% instead of magic > shifting to approximate that without division. Repairs aren't that > frequent in the kernel; and userspace can always do u64 division. > > Signed-off-by: Darrick J. Wong <djwong@xxxxxxxxxx> Reviewed-by: Bill O'Donnell <bodonnel@xxxxxxxxxx> > --- > repair/bulkload.c | 9 +++++---- > 1 file changed, 5 insertions(+), 4 deletions(-) > > > diff --git a/repair/bulkload.c b/repair/bulkload.c > index 8dd0a0c3908b..0117f69416cf 100644 > --- a/repair/bulkload.c > +++ b/repair/bulkload.c > @@ -106,9 +106,10 @@ bulkload_claim_block( > * exceptions to this rule: > * > * (1) If someone turned one of the debug knobs. > - * (2) The AG has less than ~9% space free. > + * (2) The AG has less than ~10% space free. > * > - * Note that we actually use 3/32 for the comparison to avoid division. > + * In the latter case, format the new btree blocks almost completely full to > + * minimize space usage. > */ > void > bulkload_estimate_ag_slack( > @@ -124,8 +125,8 @@ bulkload_estimate_ag_slack( > bload->leaf_slack = bload_leaf_slack; > bload->node_slack = bload_node_slack; > > - /* No further changes if there's more than 3/32ths space left. */ > - if (free >= ((sc->mp->m_sb.sb_agblocks * 3) >> 5)) > + /* No further changes if there's more than 10% space left. */ > + if (free >= sc->mp->m_sb.sb_agblocks / 10) > return; > > /* > >
