Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754270AbZIXTcS (ORCPT ); Thu, 24 Sep 2009 15:32:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754096AbZIXTcQ (ORCPT ); Thu, 24 Sep 2009 15:32:16 -0400 Received: from mx1.redhat.com ([209.132.183.28]:27324 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754058AbZIXT0o (ORCPT ); Thu, 24 Sep 2009 15:26:44 -0400 From: Vivek Goyal To: linux-kernel@vger.kernel.org, jens.axboe@oracle.com Cc: containers@lists.linux-foundation.org, dm-devel@redhat.com, nauman@google.com, dpshah@google.com, lizf@cn.fujitsu.com, mikew@google.com, fchecconi@gmail.com, paolo.valente@unimore.it, ryov@valinux.co.jp, fernando@oss.ntt.co.jp, s-uchida@ap.jp.nec.com, taka@valinux.co.jp, guijianfeng@cn.fujitsu.com, jmoyer@redhat.com, dhaval@linux.vnet.ibm.com, balbir@linux.vnet.ibm.com, righi.andrea@gmail.com, m-ikeda@ds.jp.nec.com, agk@redhat.com, vgoyal@redhat.com, akpm@linux-foundation.org, peterz@infradead.org, jmarchan@redhat.com, torvalds@linux-foundation.org, mingo@elte.hu, riel@redhat.com Subject: [PATCH 20/28] io-controller: noop changes for hierarchical fair queuing Date: Thu, 24 Sep 2009 15:25:24 -0400 Message-Id: <1253820332-10246-21-git-send-email-vgoyal@redhat.com> In-Reply-To: <1253820332-10246-1-git-send-email-vgoyal@redhat.com> References: <1253820332-10246-1-git-send-email-vgoyal@redhat.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2509 Lines: 80 This patch changes noop to use queue scheduling code from elevator layer. One can go back to old noop by deselecting CONFIG_IOSCHED_NOOP_HIER. Signed-off-by: Nauman Rafique Signed-off-by: Vivek Goyal Acked-by: Rik van Riel --- block/Kconfig.iosched | 11 +++++++++++ block/noop-iosched.c | 14 ++++++++++++++ 2 files changed, 25 insertions(+), 0 deletions(-) diff --git a/block/Kconfig.iosched b/block/Kconfig.iosched index a7d0bf8..28cd500 100644 --- a/block/Kconfig.iosched +++ b/block/Kconfig.iosched @@ -25,6 +25,17 @@ config IOSCHED_NOOP that do their own scheduling and require only minimal assistance from the kernel. +config IOSCHED_NOOP_HIER + bool "Noop Hierarchical Scheduling support" + depends on IOSCHED_NOOP && CGROUPS + select ELV_FAIR_QUEUING + select GROUP_IOSCHED + default n + ---help--- + Enable hierarhical scheduling in noop. In this mode noop keeps + one IO queue per cgroup instead of a global queue. Elevator + fair queuing logic ensures fairness among various queues. + config IOSCHED_AS tristate "Anticipatory I/O scheduler" default y diff --git a/block/noop-iosched.c b/block/noop-iosched.c index 731dbf2..4ba496f 100644 --- a/block/noop-iosched.c +++ b/block/noop-iosched.c @@ -6,6 +6,7 @@ #include #include #include +#include "elevator-fq.h" struct noop_queue { struct list_head queue; @@ -82,6 +83,15 @@ static void noop_free_noop_queue(struct elevator_queue *e, void *sched_queue) kfree(nq); } +#ifdef CONFIG_IOSCHED_NOOP_HIER +static struct elv_fs_entry noop_attrs[] = { + ELV_ATTR(fairness), + ELV_ATTR(slice_sync), + ELV_ATTR(group_idle), + __ATTR_NULL +}; +#endif + static struct elevator_type elevator_noop = { .ops = { .elevator_merge_req_fn = noop_merged_requests, @@ -92,6 +102,10 @@ static struct elevator_type elevator_noop = { .elevator_alloc_sched_queue_fn = noop_alloc_noop_queue, .elevator_free_sched_queue_fn = noop_free_noop_queue, }, +#ifdef CONFIG_IOSCHED_NOOP_HIER + .elevator_features = ELV_IOSCHED_NEED_FQ | ELV_IOSCHED_SINGLE_IOQ, + .elevator_attrs = noop_attrs, +#endif .elevator_name = "noop", .elevator_owner = THIS_MODULE, }; -- 1.6.0.6 -- 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/