After computing the ostensibly-correct bucket number based on our cached

copy of the metapage, we lock the corresponding primary bucket page and

check whether the bucket count stored in hasho_prevblkno is greater than

ourthe number of buckets stored in our cached copy of the metapage. If

so, the bucket has certainly been split, because the must originally

the number of buckets stored in our cached copy of the metapage. If

so, the bucket has certainly been split, because thecountmust originally

have been less than the number of buckets that existed at that time and

can't have increased except due to a split. If not, the bucket can't have

been split, because a split would have created a new bucket with a higher