btree_and_journal_iter is old code that we want to get rid of, but we're
not ready to yet.
lack of btree node prefetching is, it turns out, a real performance
issue for fsck on spinning rust, so - add it.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
we now always have a btree_trans when using a btree_and_journal_iter;
prep work for adding prefetching to btree_and_journal_iter
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
The btree iterator code overlays keys from the journal until journal
replay is finished; since we're now starting copygc/rebalance etc.
before replay is finished, this is multithreaded access and thus needs
refcounting.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Split out a new file from recovery.c for managing the list of keys we
read from the journal: before journal replay finishes the btree iterator
code needs to be able to iterate over and return keys from the journal
as well, so there's a fair bit of code here.
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
