On Fri, May 21, 2021 at 08:55:16AM +0800, Guoqing Jiang wrote: > Let's introduce accounting_bio which checks if md needs clone the bio > for accounting. > > And add relevant function to raid0 and raid5 given both don't have > their own clone infrastrure, also checks if it is split bio. Please don't add another indirect call in the I/O submission fast path. With Spectre mitigations these are really slow, and also are hard to follow. I think moving the call to allocate the accounting bio clone entirely into the personalities is probably the cleanest approach without any of these downsides.
