Re: [RFC PATCH v2 1/7] block: Extand commit_rqs() to do batch processing

[Sagi Grimberg <sagi@xxxxxxxxxxx>]

> > diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
> > index f389d7c724bd..6a20f8e8eb85 100644
> > --- a/include/linux/blk-mq.h
> > +++ b/include/linux/blk-mq.h
> > @@ -391,6 +391,7 @@ struct blk_mq_ops {
> >   enum {
> >   	BLK_MQ_F_SHOULD_MERGE	= 1 << 0,
> >   	BLK_MQ_F_TAG_SHARED	= 1 << 1,
> > +	BLK_MQ_F_FORCE_COMMIT_RQS = 1 << 3,
>
> Maybe BLK_MQ_F_ALWAYS_COMMIT might be a better name?  Also this
> flag (just like the existing ones..) could really use a comment
> explaining it.

Would it make sense to elevate this flag to a request_queue flag
(QUEUE_FLAG_ALWAYS_COMMIT)?

I'm thinking of a possibility that an I/O scheduler may be used
to activate this functionality rather than having the driver set
it necessarily...