bcachefs: Increase max size for btree_trans bump allocator

With backpointers, alloc keys have gotten bigger, so we're needing more
memory here.

We're probably going to need to go with something more sophisticated
than a bump allocator, but - let's see if we can avoid doing that just
yet.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
This commit is contained in:
Kent Overstreet 2022-05-19 15:29:50 -04:00 • committed by Kent Overstreet
commit b7c1104612