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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id B077AC3ABB2 for ; Mon, 16 Sep 2024 07:18:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=RQglW+4Rsrwa9D9MOIO65MfYyDQzThJsOm/0bRzGPTk=; b=N+VHKPHwc+X0MHF5TlsDiCZV+D DEd7DkSNETFLpwmfJQ4do/HkNjNKiOqFgxoMmRCEA0fja9nwgJROXCiQR2wbzlyTcFya3uozDCyyx IKLmkpcEJ6SBlW6JMERVqD5QPBu8UFL1US2YqTafSwuMowMmmocxHgUGXcDed4M2SIdnQUH/jDT6d tACTpz+sxaI+FGDkkAY7G4b5Wi/YegTquuU06kfJhXGo3X4OeflQVCqlg38jIGcquJRh2VP7B9ftx P3GVHer6utVVgfOHBddTxv6Pb5ciTfVL7Z7nIJMn87iNQZTc0JHTW51Pl/OLrNnqJ25AjCXtLm+QC Pl88D/GA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98 #2 (Red Hat Linux)) id 1sq5zi-00000003I0Q-0nho; Mon, 16 Sep 2024 07:17:58 +0000 Received: from verein.lst.de ([213.95.11.211]) by bombadil.infradead.org with esmtps (Exim 4.98 #2 (Red Hat Linux)) id 1sq5zf-00000003Hys-0HzI for linux-nvme@lists.infradead.org; Mon, 16 Sep 2024 07:17:56 +0000 Received: by verein.lst.de (Postfix, from userid 2407) id 0F79E227AAD; Mon, 16 Sep 2024 09:17:48 +0200 (CEST) Date: Mon, 16 Sep 2024 09:17:47 +0200 From: Christoph Hellwig To: David Jeffery Cc: Keith Busch , ens Axboe , Christoph Hellwig , Sagi Grimberg , linux-nvme@lists.infradead.org Subject: Re: [PATCH 4/4] nvme: use per device timeout waits over depending on global default value Message-ID: <20240916071747.GA16514@lst.de> References: <20240913134430.5416-1-djeffery@redhat.com> <20240913134430.5416-5-djeffery@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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-20240916_001755_269833_6FC774F4 X-CRM114-Status: GOOD ( 11.75 ) 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: , Sender: "Linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org On Fri, Sep 13, 2024 at 02:36:45PM -0400, David Jeffery wrote: > The expansion of nvme to be a remote storage interface means different > namespaces provided by the same controller can have very different > characteristics. You can do the same over PCIe attachment. But that doesn't really chnge that the fundamental relevant abstraction level in NVMe is the controller here.