From mboxrd@z Thu Jan 1 00:00:00 1970 From: hch@lst.de (Christoph Hellwig) Date: Wed, 28 Mar 2018 10:06:46 +0200 Subject: [PATCH] nvme-multipath: implement active-active round-robin path selector In-Reply-To: <20180327043851.6640-1-baegjae@gmail.com> References: <20180327043851.6640-1-baegjae@gmail.com> Message-ID: <20180328080646.GB20373@lst.de> For PCIe devices the right policy is not a round robin but to use the pcie device closer to the node. I did a prototype for that long ago and the concept can work. Can you look into that and also make that policy used automatically for PCIe devices? From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752474AbeC1IGu (ORCPT ); Wed, 28 Mar 2018 04:06:50 -0400 Received: from verein.lst.de ([213.95.11.211]:44443 "EHLO newverein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751981AbeC1IGr (ORCPT ); Wed, 28 Mar 2018 04:06:47 -0400 Date: Wed, 28 Mar 2018 10:06:46 +0200 From: Christoph Hellwig To: Baegjae Sung Cc: keith.busch@intel.com, axboe@fb.com, hch@lst.de, sagi@grimberg.me, linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] nvme-multipath: implement active-active round-robin path selector Message-ID: <20180328080646.GB20373@lst.de> References: <20180327043851.6640-1-baegjae@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20180327043851.6640-1-baegjae@gmail.com> User-Agent: Mutt/1.5.17 (2007-11-01) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For PCIe devices the right policy is not a round robin but to use the pcie device closer to the node. I did a prototype for that long ago and the concept can work. Can you look into that and also make that policy used automatically for PCIe devices?