On Tue, Mar 29, 2016 at 12:24:43AM -0700, Christoph Hellwig wrote: > On Fri, Mar 25, 2016 at 02:36:30PM -0700, Shaohua Li wrote: > > we allocate most data structure in device's node, but some data > > structures are not for DMA and mostly used by specific cpus/node which > > could diff from device's node. Allocating such hot data in device's > > node doesn't make sense. Add an API to estimate hardware queue node. > > This can be used before blk-mq actually establishes the mapping. This > > API runs slow, but it only used in initialization time. > > I think this is the wrong way around. I've got some proprotype code > that just leaves the cpu assignments to the drivers and picks it up > in blk-mq. Give me a few days to post it..
This looks weird, shouldn't the cpu assignment be determined by block core (blk-mq) because block core decides how to use the queue?
