On Wed, 20 Jan 2021 14:44:05 +0000 Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote: > Just curious: wouldn't it make more sense to implement this as a bio > based driver with a helper thread? It doesn't look like blk-mq provides > you a lot of benefits here. And then we could make the blk-mq code > optional and you could save a fair amount of a kernel memory on your > rather constrained device. I'm not sure I know what that is, or how to do so. This is what the existing simple drivers were doing, so I copied them. - Lauri