Received: by 2002:ac0:a581:0:0:0:0:0 with SMTP id m1-v6csp813565imm; Mon, 2 Jul 2018 23:56:41 -0700 (PDT) X-Google-Smtp-Source: ADUXVKKswoPSNGxbrn8Zit2hFHQ20jHYMI4JulVWsgpQ53HGfis0ji2TuNh0dRt4HKd77J/yYE3a X-Received: by 2002:a65:4d91:: with SMTP id p17-v6mr23565638pgq.296.1530601001445; Mon, 02 Jul 2018 23:56:41 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1530601001; cv=none; d=google.com; s=arc-20160816; b=sNgqIsBzQh2mNPzTMJpcge4tGwRU7c6C1egd+V91lsZkIyZ6IuKM6+ojoChjgQr4Cm XLax+eqeJeN7Ler7ujIimeewsJfd89gDj8ndaFa7A0HgaiSwwcoooIIV9ZOmFpaqeCQ5 fnpZ91dUbt0ZGr051POn1QD2bmB8501RK242qt+p5gLCEaK+Dhi7q986XhUrWUSJqiwC 9XnA6Rtk0GJRn4L+pZNlx39G91H5fBUbTjIJcSidEaczY4cyq/6fgHvvBe+0v/OGIypq xwX5FNOIrosgGx4y85QgV8iOpZhCHe/v6P/jiRzKslvnVgT398DtxJJjpzMPvTJyz2j4 oqrg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:message-id:date:subject:cc:to:from :arc-authentication-results; bh=kmpul5TCMeJf2+BMKHNpIEcA9W2dwmlMFzyoyumkVuE=; b=KdXtckbr6TepFpnGMTZUgVB+kBnrZCBSFGWE54EwjvFYEl92J2/bJDywatyJHSPlf2 5phPIZFkDARx4x6O03nM19fYLu5rlTY46Z+DiwxnhMbOJcfZ2oTEiHOXLu25Ii2ibenf ufWk/XSdYLwTt78y+VWzsLAkXJ9YMRQdbeR6w7japJm77FkKTiwvkp7oA3qUW9cp7G9/ 0Jh/bDuGZc6IUTmk0+ffDuQni6pVQgpyl659h9OYI+4GYknRaNOQ31owOdZXe9ovCbdu 7xSVHKUJxp/odwnQMQEwKnI2XREhGiR3bfCqYGPlw/QekKxfrOmv+BWNxkIqpamk30up vnig== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id a5-v6si405532pgu.119.2018.07.02.23.56.26; Mon, 02 Jul 2018 23:56:41 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754295AbeGCGyi (ORCPT + 99 others); Tue, 3 Jul 2018 02:54:38 -0400 Received: from mx2.suse.de ([195.135.220.15]:34722 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753814AbeGCGyh (ORCPT ); Tue, 3 Jul 2018 02:54:37 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay1.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id DF3A1ACF0; Tue, 3 Jul 2018 06:54:35 +0000 (UTC) From: Johannes Thumshirn To: "Martin K . Petersen" Cc: Christoph Hellwig , Bart Van Assche , Hannes Reinecke , Ming Lei , Linux Kernel Mailinglist , Linux SCSI Mailinglist , Johannes Thumshirn Subject: [RFC] scsi: switch to scsi-mq by default Date: Tue, 3 Jul 2018 08:54:13 +0200 Message-Id: <20180703065413.6098-1-jthumshirn@suse.de> X-Mailer: git-send-email 2.16.4 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org It has been more than one year since we tried to change the default from legacy to multi queue in SCSI. Back then we had to retract the change because of performance issues with rotating disks. In the meantime there have been a substantial amount of performance improvements, thus we can re-enable scsi-mq without a significant performance penalty. Signed-off-by: Johannes Thumshirn --- drivers/scsi/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig index 35c909bbf8ba..bd115bab162e 100644 --- a/drivers/scsi/Kconfig +++ b/drivers/scsi/Kconfig @@ -49,6 +49,7 @@ config SCSI_NETLINK config SCSI_MQ_DEFAULT bool "SCSI: use blk-mq I/O path by default" + default y depends on SCSI ---help--- This option enables the new blk-mq based I/O path for SCSI -- 2.16.4