On 03/12/2015 10:29 AM, Mike Snitzer wrote: > Add a variant of blk_mq_init_queue that allows a previously allocated > queue to be initialized. blk_mq_init_allocated_queue models > blk_init_allocated_queue -- which was also created for DM's use. > > DM's approach to device creation requires a placeholder request_queue be > allocated for use with alloc_dev() but the decision about what type of > request_queue will be ultimately created is deferred until all component > devices referenced in the DM table are processed to determine the table > type (request-based, blk-mq request-based, or bio-based). > > Also, because of DM's late finalization of the request_queue type > the call to blk_mq_register_disk() doesn't happen during alloc_dev(). > Must export blk_mq_register_disk() so that DM can backfill the 'mq' dir > once the blk-mq queue is fully allocated. > > Signed-off-by: Mike Snitzer <snitzer@xxxxxxxxxx> > Reviewed-by: Ming Lei <ming.lei@xxxxxxxxxxxxx> Reviewed-by: Hannes Reinecke <hare@xxxxxxx> Cheers, Hannes -- Dr. Hannes Reinecke zSeries & Storage hare@xxxxxxx +49 911 74053 688 SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg) -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
