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[23.128.96.19]) by mx.google.com with ESMTPS id q9-20020a170902eb8900b00153b2d16415si20643748plg.29.2022.03.30.22.25.41 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 30 Mar 2022 22:25:41 -0700 (PDT) Received-SPF: softfail (google.com: domain of transitioning linux-kernel-owner@vger.kernel.org does not designate 23.128.96.19 as permitted sender) client-ip=23.128.96.19; Authentication-Results: mx.google.com; dkim=pass header.i=@infradead.org header.s=bombadil.20210309 header.b=44GVYRfH; spf=softfail (google.com: domain of transitioning linux-kernel-owner@vger.kernel.org does not designate 23.128.96.19 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 00A3F5AEC6; Wed, 30 Mar 2022 21:35:35 -0700 (PDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229483AbiCaEhN (ORCPT + 99 others); Thu, 31 Mar 2022 00:37:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41228 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229532AbiCaEhC (ORCPT ); Thu, 31 Mar 2022 00:37:02 -0400 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:e::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0F7185AA4D; Wed, 30 Mar 2022 21:35:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=mjPo0ALhekam+cKurpmgNPz65ahpCtgaw9wWKXxz9nI=; b=44GVYRfH+UprBVY3J4nWjDcdFC 2amAFX2YH/w/AFeCYskg5KZG1YfzoTllYEMMjzreui5CIFI7Y2FmlR/k+41QJKyP+50HCuRiRZ8Av SErvLxnR5H3X3WsITfCyKWyPtYku8rgUyoxxasW2YL4SHWd8IbvLQlZpkUzsXr5w2fRHsU6Gkc22Y bweeehvAFhiKn52Yajy2VoAMsUjnqFSOq9lR3WZ8kuI8Lo8xm9FcXlyalYz7cRdL7gyBILRlv39tS 5nlNzqFfkd1XiTOpZh5N2omP03ldvhIQv3iAD9y30woTnij9jrFGbGLdoeqbNXdjh995ogWznzFpB Ok5LVh0A==; Received: from hch by bombadil.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1nZmWg-000dOB-Le; Thu, 31 Mar 2022 04:35:14 +0000 Date: Wed, 30 Mar 2022 21:35:14 -0700 From: Christoph Hellwig To: Michael Marod Cc: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org Subject: Re: NVME performance regression in Linux 5.x due to lack of block level IO queueing Message-ID: References: <51E3A396-F68B-496D-AE36-B0457A3B0968@michaelmarod.com> <847D3821-1D92-468C-88C3-34284BA7922E@michaelmarod.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RDNS_NONE,SPF_HELO_NONE,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 5.4 is very old. Do you still have a problem with the latest kernel (5.17) ?