From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753862AbeBLQrc (ORCPT ); Mon, 12 Feb 2018 11:47:32 -0500 Received: from mail-qk0-f194.google.com ([209.85.220.194]:39631 "EHLO mail-qk0-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753789AbeBLQra (ORCPT ); Mon, 12 Feb 2018 11:47:30 -0500 X-Google-Smtp-Source: AH8x226qvmF13/2i8FvHxWyLvZE2IJALIcqiaWnZ2/uWhyvmBRaeCX2dtOEaeZ0uZEnoC9hQ04gYMQ== Date: Mon, 12 Feb 2018 08:47:26 -0800 From: Tejun Heo To: Juri Lelli Cc: peterz@infradead.org, mingo@redhat.com, linux-kernel@vger.kernel.org, tglx@linutronix.de, vincent.guittot@linaro.org, rostedt@goodmis.org, luca.abeni@santannapisa.it, claudio@evidence.eu.com, tommaso.cucinotta@santannapisa.it, bristot@redhat.com, mathieu.poirier@linaro.org, tkjos@android.com, joelaf@google.com, morten.rasmussen@arm.com, dietmar.eggemann@arm.com, patrick.bellasi@arm.com, alessio.balsini@arm.com Subject: Re: [RFC PATCH 2/3] sched/deadline: add task groups bandwidth management support Message-ID: <20180212164726.GT695913@devbig577.frc2.facebook.com> References: <20180212134030.12846-1-juri.lelli@redhat.com> <20180212134030.12846-3-juri.lelli@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180212134030.12846-3-juri.lelli@redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, On Mon, Feb 12, 2018 at 02:40:29PM +0100, Juri Lelli wrote: > - implementation _is not_ hierarchical: only single/plain DEADLINE entities > can be handled, and they get scheduled at root rq level This usually is a deal breaker and often indicates that the cgroup filesystem is not the right interface for the feature. Can you please elaborate the interface with some details? Thanks. -- tejun