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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C84B0C433F5 for ; Tue, 12 Oct 2021 15:06:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A5DD461076 for ; Tue, 12 Oct 2021 15:06:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237195AbhJLPIq (ORCPT ); Tue, 12 Oct 2021 11:08:46 -0400 Received: from verein.lst.de ([213.95.11.211]:41837 "EHLO verein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237062AbhJLPIq (ORCPT ); Tue, 12 Oct 2021 11:08:46 -0400 Received: by verein.lst.de (Postfix, from userid 2407) id 7F33C67373; Tue, 12 Oct 2021 17:06:41 +0200 (CEST) Date: Tue, 12 Oct 2021 17:06:41 +0200 From: Christoph Hellwig To: Sagi Grimberg Cc: Jens Axboe , Christoph Hellwig , Jeffle Xu , Ming Lei , Damien Le Moal , Keith Busch , "Wunderlich, Mark" , "Vasudevan, Anil" , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-nvme@lists.infradead.org Subject: Re: switch block layer polling to a bio based model v4 Message-ID: <20211012150641.GA20447@lst.de> References: <20211012111226.760968-1-hch@lst.de> <07f31547-5570-4150-7a4b-1d773fb9fa87@kernel.dk> <040104f6-720d-35ed-7e15-a704e6488fd4@grimberg.me> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <040104f6-720d-35ed-7e15-a704e6488fd4@grimberg.me> User-Agent: Mutt/1.5.17 (2007-11-01) Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org On Tue, Oct 12, 2021 at 05:57:43PM +0300, Sagi Grimberg wrote: > Jens, is that with nvme_core.multipath=Y ? That is the default. But for most PCI device namespaces are private by default so we won't use the multipath code anyway. Only for dual ported devices, and even for those that flag might need to be set explicitly at namespace creation time. 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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2EAB6C433F5 for ; Tue, 12 Oct 2021 15:07:08 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id BEE2360527 for ; Tue, 12 Oct 2021 15:07:07 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org BEE2360527 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=4HbtxnZNpWYtwmfUHcQ8+jnkx/DH+Ei4eRJeRjDYSvE=; b=z+AOc8wsAb+GEU vOZ6vORqIAzsXNmPQpfx5N7fgHjMgBQF1c/+jJlb1rDqzvy/+Cx2nZnEA0uBV+J9ug9I6icJruIE0 wOkOMGOZH15C20h2yWZxJya4Dk7V35BRMmD4XCh7EEOF4Z0zMhGBiCsz1mHtQD9esQ1dyF5+Nz+Vr HiO+GjnxcQLVTBFz8/iJ+EXxn92N5yMOMrfuPiexWNyxQu5HOfDUj2Hti749sQGn3Vh08Pc6rt1tb /4tDkrleGsrLiehbuC/8qTVMlrZWJwDLGzwQSUokAosaEBN8gRD4Ll3j2pAJIjfC8A51qK+fjd9wS r0Y9/JD136PxVGV5dk1Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1maJMg-00DICd-JI; Tue, 12 Oct 2021 15:06:50 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1maJMd-00DIBK-Na for linux-nvme@lists.infradead.org; Tue, 12 Oct 2021 15:06:49 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id 7F33C67373; Tue, 12 Oct 2021 17:06:41 +0200 (CEST) Date: Tue, 12 Oct 2021 17:06:41 +0200 From: Christoph Hellwig To: Sagi Grimberg Cc: Jens Axboe , Christoph Hellwig , Jeffle Xu , Ming Lei , Damien Le Moal , Keith Busch , "Wunderlich, Mark" , "Vasudevan, Anil" , linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-nvme@lists.infradead.org Subject: Re: switch block layer polling to a bio based model v4 Message-ID: <20211012150641.GA20447@lst.de> References: <20211012111226.760968-1-hch@lst.de> <07f31547-5570-4150-7a4b-1d773fb9fa87@kernel.dk> <040104f6-720d-35ed-7e15-a704e6488fd4@grimberg.me> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <040104f6-720d-35ed-7e15-a704e6488fd4@grimberg.me> User-Agent: Mutt/1.5.17 (2007-11-01) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211012_080647_944606_5A44AF07 X-CRM114-Status: GOOD ( 12.55 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On Tue, Oct 12, 2021 at 05:57:43PM +0300, Sagi Grimberg wrote: > Jens, is that with nvme_core.multipath=Y ? That is the default. But for most PCI device namespaces are private by default so we won't use the multipath code anyway. Only for dual ported devices, and even for those that flag might need to be set explicitly at namespace creation time. _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme