From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3E1A3C433E0 for ; Mon, 1 Jun 2020 12:37:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0C5AC2081A for ; Mon, 1 Jun 2020 12:37:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=yandex-team.ru header.i=@yandex-team.ru header.b="K9jD1x/W" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727863AbgFAMhS (ORCPT ); Mon, 1 Jun 2020 08:37:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41718 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725974AbgFAMhS (ORCPT ); Mon, 1 Jun 2020 08:37:18 -0400 Received: from forwardcorp1p.mail.yandex.net (forwardcorp1p.mail.yandex.net [IPv6:2a02:6b8:0:1472:2741:0:8b6:217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D5EC3C061A0E; Mon, 1 Jun 2020 05:37:17 -0700 (PDT) Received: from mxbackcorp1o.mail.yandex.net (mxbackcorp1o.mail.yandex.net [IPv6:2a02:6b8:0:1a2d::301]) by forwardcorp1p.mail.yandex.net (Yandex) with ESMTP id 2D98F2E1537; Mon, 1 Jun 2020 15:37:15 +0300 (MSK) Received: from myt5-70c90f7d6d7d.qloud-c.yandex.net (myt5-70c90f7d6d7d.qloud-c.yandex.net [2a02:6b8:c12:3e2c:0:640:70c9:f7d]) by mxbackcorp1o.mail.yandex.net (mxbackcorp/Yandex) with ESMTP id sin8Zu6uxy-bCx0121q; Mon, 01 Jun 2020 15:37:15 +0300 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yandex-team.ru; s=default; t=1591015035; bh=5PjvOIhiYKATy5WYX6CV1e4IcQVtVa9D6p3WuT8s0D4=; h=In-Reply-To:Message-ID:References:Date:To:From:Subject:Cc; b=K9jD1x/WB9MFGRSpVuHnqjbBhyphhBcCrzbaFsCSmn9JkSKKe0ODm3hEKA71EuJyc C+I3jmbann0MWOxySvQwGsSwS5d9o8a3UxSAGqfJ08XOkx6K1CFBy/WMWf6oYvoXfB //Wi04hvl39aEpn3MdcQYH4aWcNe8WtZMfonbUNg= Authentication-Results: mxbackcorp1o.mail.yandex.net; dkim=pass header.i=@yandex-team.ru Received: from dynamic-vpn.dhcp.yndx.net (dynamic-vpn.dhcp.yndx.net [2a02:6b8:b080:6420::1:8]) by myt5-70c90f7d6d7d.qloud-c.yandex.net (smtpcorp/Yandex) with ESMTPSA id oflWdp3Iqs-bCW4OxOY; Mon, 01 Jun 2020 15:37:12 +0300 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (Client certificate not present) Subject: [PATCH RFC 2/3] md/raid0: enable REQ_NOWAIT From: Konstantin Khlebnikov To: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, dm-devel@redhat.com, linux-raid@vger.kernel.org, Jens Axboe Cc: Christoph Hellwig Date: Mon, 01 Jun 2020 15:37:12 +0300 Message-ID: <159101503243.180989.945052901574296650.stgit@buzz> In-Reply-To: <159101473169.180989.12175693728191972447.stgit@buzz> References: <159101473169.180989.12175693728191972447.stgit@buzz> User-Agent: StGit/0.22-39-gd257 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Set limits.nowait_requests = 1 before stacking limits. Raid itself does not delay bio in raid0_make_request(). Signed-off-by: Konstantin Khlebnikov --- drivers/md/raid0.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/md/raid0.c b/drivers/md/raid0.c index 322386ff5d22..e34292b05488 100644 --- a/drivers/md/raid0.c +++ b/drivers/md/raid0.c @@ -406,6 +406,9 @@ static int raid0_run(struct mddev *mddev) blk_queue_io_opt(mddev->queue, (mddev->chunk_sectors << 9) * mddev->raid_disks); + /* raid0_make_request() does not delay requests */ + mddev->queue->limits.nowait_requests = 1; + rdev_for_each(rdev, mddev) { disk_stack_limits(mddev->gendisk, rdev->bdev, rdev->data_offset << 9);