bcachefs: Preallocate trans mem in bch2_migrate_index_update()

This will help avoid transaction restarts.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2021-04-19 00:33:05 -04:00 • committed by Kent Overstreet
commit e95d7edfb7