From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gui Jianfeng Subject: Re: [PATCH 02/24] io-controller: Core of the elevator fair queuing Date: Fri, 21 Aug 2009 09:54:02 +0800 Message-ID: <4A8DFE3A.6030503@cn.fujitsu.com> References: <1250451046-9966-1-git-send-email-vgoyal@redhat.com> <1250451046-9966-3-git-send-email-vgoyal@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1250451046-9966-3-git-send-email-vgoyal@redhat.com> Sender: linux-kernel-owner@vger.kernel.org To: Vivek Goyal Cc: linux-kernel@vger.kernel.org, containers@lists.linux-foundation.org, dm-devel@redhat.com, jens.axboe@oracle.com, ryov@valinux.co.jp, balbir@linux.vnet.ibm.com, righi.andrea@gmail.com, nauman@google.com, dpshah@google.com, lizf@cn.fujitsu.com, mikew@google.com, fchecconi@gmail.com, paolo.valente@unimore.it, fernando@oss.ntt.co.jp, s-uchida@ap.jp.nec.com, taka@valinux.co.jp, jmoyer@redhat.com, dhaval@linux.vnet.ibm.com, m-ikeda@ds.jp.nec.com, agk@redhat.com, akpm@linux-foundation.org, peterz@infradead.org, jmarchan@redhat.com List-Id: dm-devel.ids Vivek Goyal wrote: ... > + > +static void put_prev_io_entity(struct io_entity *entity) > +{ > + struct io_service_tree *st = entity->st; > + struct io_sched_data *sd = io_entity_sched_data(entity); > + > + st->active_entity = NULL; > + sd->active_entity = NULL; > + > + if (unlikely(entity->ioprio_changed)) { > + dequeue_io_entity(entity); > + io_entity_update_prio(entity); Hi Vivek, we don't need to update prio here for the following enqueue_io_entity() is already taking care of it. Signed-off-by: Gui Jianfeng --- block/elevator-fq.c | 1 - 1 files changed, 0 insertions(+), 1 deletions(-) diff --git a/block/elevator-fq.c b/block/elevator-fq.c index 201543e..b720139 100644 --- a/block/elevator-fq.c +++ b/block/elevator-fq.c @@ -607,7 +607,6 @@ static void put_prev_io_entity(struct io_entity *entity) if (unlikely(entity->ioprio_changed)) { dequeue_io_entity(entity); - io_entity_update_prio(entity); enqueue_io_entity(entity); } else __enqueue_io_entity(st, entity); -- 1.5.4.rc3