From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752816AbdATO3D (ORCPT ); Fri, 20 Jan 2017 09:29:03 -0500 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:42417 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752167AbdATO3A (ORCPT ); Fri, 20 Jan 2017 09:29:00 -0500 Date: Fri, 20 Jan 2017 07:28:57 -0700 From: Jens Axboe To: Paolo Valente CC: , Linux-Kernal , Subject: Re: [PATCH 7/8] mq-deadline: add blk-mq adaptation of the deadline IO scheduler Message-ID: <20170120142857.GC18162@kernel.dk> References: <1481933536-12844-1-git-send-email-axboe@fb.com> <1481933536-12844-8-git-send-email-axboe@fb.com> <2E4B3957-783C-41D4-A1BD-C329F6BDA65D@linaro.org> <89FD5566-F9DE-492C-8AC1-CC2542D7CE7E@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <89FD5566-F9DE-492C-8AC1-CC2542D7CE7E@linaro.org> X-Originating-IP: [192.168.54.13] X-Proofpoint-Spam-Reason: safe X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-01-20_10:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Jan 20 2017, Paolo Valente wrote: > > > Il giorno 20 gen 2017, alle ore 14:14, Paolo Valente ha scritto: > > > >> > >> Il giorno 17 dic 2016, alle ore 01:12, Jens Axboe ha scritto: > >> > >> This is basically identical to deadline-iosched, except it registers > >> as a MQ capable scheduler. This is still a single queue design. > >> > > > > Jens, > > no spin_lock_irq* in the code. So, also request dispatches are > > guaranteed to never be executed in IRQ context? > > Or maybe the opposite? That is, all scheduler functions invoked in IRQ context? Nope -- Jens Axboe