On Mon, Oct 18, 2021 at 09:37:28PM +0100, Pavel Begunkov wrote: > We should have enough of registers in blk_mq_rq_ctx_init(), store them > in local vars, so we don't keep reloading them. > > note: keeping q->elevator may look unnecessary, but it's also used > inside inlined blk_mq_tags_from_data(). Is this really making a difference? I'd expect todays hyper-optimizing compilers to not be tricked into specific register allocations just by adding a local variable.
