On 03/17/2017 11:03 PM, Omar Sandoval wrote: > From: Omar Sandoval <osandov@xxxxxx> > > This patch series implements an I/O scheduler for multiqueue devices > combining several techniques: the scalable bitmap library, the new > blk-stats API, and queue depth throttling similar to blk-wbt. > > These patches are on top of my earlier blk-stats series [1]. They also > need a fix in Jens' for-linus branch in order to work properly [2]. > > Patches 1 and 2 implement a new sbitmap operation and patch 3 exports a > required function. Patch 4 implements the new scheduler, named Kyber. > > The commit message in patch 4 describes Kyber in detail. The scheduler > employs some heuristics that I've experimented with, but that's probably > the area that needs the most work. I'll be at LSF/MM next week, and > there's currently a lightning talk on the schedule to discuss > improvements and extensions. > [ .. ] A silent round of applause for you. Very much appreciated. And actually, I have been looking at properly supporting host-wide tag maps, so the concept of 'shallow' queue depth might be the way to go here. And as I have some other questions, too (assigning a new tag on requeue?) it might be an idea to spread this out into a formal session at LSF. If there are some slots left, that is. 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)
