On 07/22/2016 10:45 PM, Martin K. Petersen wrote: >>>>>> "Hannes" == Hannes Reinecke <hare@xxxxxxx> writes: > > Hannes> Add a sysfs queue attribute 'zoned' to display the zone layout > Hannes> for zoned devices. > > Not quite one value per file :( > Yes. But I wanted to display the zone layout in a concise way allowing user-space programs to determine the zone layout without having to issue a 'REPORT ZONES' command themselves. I found it slightly pointless to add one sysfs entry per zone, and at the same time a simple 'zone_size' attribute wouldn't cover all possibilities. However, as SMR drives seem to stabilise around having a fixed zone size (with a possible exemption of the last zone to cover left-overs) I'd be fine a replace this with a single 'zone_size' attribute which could be set to eg '-1' for drives which indeed would implement variable zone sizes. 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) -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
