From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Wolfgang M. Reimer" Subject: Re: Where IOSCHED ? Date: Fri, 24 Jul 2015 11:35:11 +0200 Message-ID: <55B206CF.3050000@gmail.com> References: <55AFF784.7040900@pavlinux.ru> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit To: pavel@pavlinux.ru, linux-rt-users@vger.kernel.org Return-path: Received: from mail-wi0-f176.google.com ([209.85.212.176]:33136 "EHLO mail-wi0-f176.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751071AbbGXJfP (ORCPT ); Fri, 24 Jul 2015 05:35:15 -0400 Received: by wicmv11 with SMTP id mv11so57215353wic.0 for ; Fri, 24 Jul 2015 02:35:14 -0700 (PDT) In-Reply-To: <55AFF784.7040900@pavlinux.ru> Sender: linux-rt-users-owner@vger.kernel.org List-ID: On 22.07.2015 22:05, Pavel Vasilyev wrote: > # dmesg | grep sched > [ 0.387902] io scheduler noop registered > [ 0.387989] io scheduler deadline registered > [ 0.388079] io scheduler cfq registered (default) > # dmesg | grep sched [ 0.516085] io scheduler noop registered [ 0.516089] io scheduler deadline registered (default) [ 0.516096] io scheduler cfq registered > # cat /boot/config-3.18.17-rt14 | grep IOSCHED > CONFIG_IOSCHED_NOOP=y > CONFIG_IOSCHED_DEADLINE=y > CONFIG_IOSCHED_CFQ=y > CONFIG_CFQ_GROUP_IOSCHED=y > CONFIG_DEFAULT_IOSCHED="cfq" > # cat /boot/config-3.18.17-rt14 | grep IOSCHED CONFIG_IOSCHED_NOOP=y CONFIG_IOSCHED_DEADLINE=y CONFIG_IOSCHED_CFQ=y CONFIG_CFQ_GROUP_IOSCHED=y CONFIG_DEFAULT_IOSCHED="deadline" > # cat /sys/block/sda/queue/scheduler > none > # cat /sys/block/sda/queue/scheduler noop [deadline] cfq > # uname -a > Linux localhost 3.18.17-rt14 #1 SMP PREEMPT RT Wed Jul 22 18:49:51 MSK 2015 x86_64 GNU/Linux # uname -a Linux t520-wolf 3.18.17-rt14 #1 SMP PREEMPT RT Tue Jul 7 14:23:12 CEST 2015 x86_64 x86_64 x86_64 GNU/Linux Hi Pavel, so in my case /sys/block/sda/queue/scheduler shows the correct I/O schedulers for the *same* kernel (3.18.17-rt14). The only difference is that my default I/O scheduler is "deadline". Wolfgang