Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751743AbaFDRvm (ORCPT ); Wed, 4 Jun 2014 13:51:42 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:47081 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750750AbaFDRvk (ORCPT ); Wed, 4 Jun 2014 13:51:40 -0400 Date: Wed, 4 Jun 2014 10:51:31 -0700 From: Christoph Hellwig To: Tejun Heo Cc: Christoph Hellwig , Jens Axboe , Paolo Valente , Li Zefan , Fabio Checconi , Arianna Avanzini , Paolo Valente , linux-kernel@vger.kernel.org, containers@lists.linux-foundation.org, cgroups@vger.kernel.org Subject: Re: [PATCH RFC - TAKE TWO - 00/12] New version of the BFQ I/O Scheduler Message-ID: <20140604175131.GA25388@infradead.org> References: <20140602172454.GA8912@htj.dyndns.org> <538CB515.3090700@kernel.dk> <20140602174250.GC8912@htj.dyndns.org> <538CB87C.7030600@kernel.dk> <20140602185138.GD8912@htj.dyndns.org> <20140602205713.GB8357@kernel.dk> <20140604143136.GA1920@infradead.org> <20140604145053.GE5004@htj.dyndns.org> <20140604145330.GA2955@infradead.org> <20140604145829.GF5004@htj.dyndns.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140604145829.GF5004@htj.dyndns.org> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jun 04, 2014 at 10:58:29AM -0400, Tejun Heo wrote: > I think what Jens is planning is something really minimal. Things > like [cb]fq heavily depend on the old block infrastructure. I don't > know. Maybe they can be merged in time but I'm not quite sure we'd > have enough pressure to actually do that. Host-granular switching > should be good enough, I guess. Jens told me he wanted to do a deadline scheduler, which actually is the most sensible for disks unless you want all the cgroup magic. Given that people in this thread are interested in more complex schedulers I'd suggest they implement BFQ for blk-mq. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/