On Fri, 2019-07-19 at 05:01 +0000, Damien Le Moal wrote: > > I suppose that would work and be simpler. I honestly don't know much > > about the block layer and tag allocation so I stayed away from it :-) > > > > I'll dig, but a hint would be welcome :) > > Uuuh.. Never played with the tag management code directly myself either. A > quick > look seem to indicate that blk_mq_get/put_tag() is what you should be using. > But > further looking, struct blk_mq_tags has the field nr_reserved_tags which is > used > as an offset start point for searching free tags, which is exactly what you > would need.
Yup. I was getting there, it's just that we use the tagset mess which I had to untangle a bit first :-) Cheers, Ben.
