On Wed, Nov 28, 2018 at 04:33:03PM +1100, Dave Chinner wrote: > One thing that is going to make this more complex at the XFS layer > is discontiguous buffers. They require multiple IOs (and therefore > bios) and so we are going to need to ensure that all the bios use > the same bi_rw_hint. Well, in case of raid 1 the load balancing code might actually map different bios to different initial legs. What we really need is to keep the 'index' or each bio. One good way to archive that is to just reuse the bio for the retry instead of allocating a new one.
