bcachefs: Bias reads more in favor of faster device

Per reports of performance issues on mixed multi device filesystems
where we're issuing too much IO to the spinning rust - tweak this
algorithm.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-11-23 16:47:10 -05:00
commit e1cb4f56dc