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 AEDF5C433EF for ; Wed, 2 Feb 2022 12:38:46 +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=TI6TXWscOT8zoXJHYAzpfg+zf/n6iDeklYvo47/89uQ=; b=R2SCV9qD2vU3DilHdsWvgWCwAJ mc7T8UltDig368VE/o/O2hQPVUBb2DgKBnocfP0w9EhPbat5JRaJoElFRpCrhHaSCqFGsAlyZnFf4 v1CmqJ4Xy/P5tdw2Su1OsjE9FU6ZQLbNQSBDkbtLY32VWOo3yGdi2Wc7dQHOLQtniE103LHL2OCWf OLRJPIrtQO4VjR89GeHcOGhGRtjqjG4VHuIDYVUVw3+94CBjMtQCRxX3BDhJa++JthHxsaPZtPOiv wy+84hhYbUkSGc8dtIIXxMKnvllBERZoNiPtzdaBGbu0YeFvYE9n34ts3L7e69eVZTIK36Yl/SIE4 l3qA8rtA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nFEuG-00FChA-1L; Wed, 02 Feb 2022 12:38:40 +0000 Received: from new4-smtp.messagingengine.com ([66.111.4.230]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nFEuA-00FCeC-DA for linux-nvme@lists.infradead.org; Wed, 02 Feb 2022 12:38:35 +0000 Received: from compute2.internal (compute2.nyi.internal [10.202.2.46]) by mailnew.nyi.internal (Postfix) with ESMTP id AD506580255; Wed, 2 Feb 2022 07:38:28 -0500 (EST) Received: from mailfrontend2 ([10.202.2.163]) by compute2.internal (MEProxy); Wed, 02 Feb 2022 07:38:28 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=irrelevant.dk; h=cc:cc:content-type:date:date:from:from:in-reply-to :in-reply-to:message-id:mime-version:references:reply-to:sender :subject:subject:to:to; s=fm2; bh=TI6TXWscOT8zoXJHYAzpfg+zf/n6iD eklYvo47/89uQ=; b=NSuTjVrtEuFkF9P1RQXHIoM9kjTSQZdfZgSzzltnEhfykL 3hDgc/CvT9TAFZwEAcTMo19o8xUhTrvEp7fyq5/dai4pkgheXKl5wtSTiTuSrlu0 Oc+X0+9Nid+CLCWGqgpu0BEu2bVyGckvyRZg5403BS1NzFSfvfxDNTtC62CbazEB XdBG7SWzYN934CO2/RtevYk79zKwsCII80O/ip5RrpFkORJJs4XVtlG2cckSZQGB SjaYds5WYCLoX5lZ8AIeUYd5a/+YyrDZzBF1GbUNwQy1mZd+XGNZ4GZQBqJhDIpX Cuum6RHdHBxgL5OX4rhURLhw41E7RJ1OWIhtBApQ== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:cc:content-type:date:date:from:from :in-reply-to:in-reply-to:message-id:mime-version:references :reply-to:sender:subject:subject:to:to:x-me-proxy:x-me-proxy :x-me-sender:x-me-sender:x-sasl-enc; s=fm2; bh=TI6TXWscOT8zoXJHY Azpfg+zf/n6iDeklYvo47/89uQ=; b=kkgR0M9m6xohXUUZX4sHhzZo1LDKxfehY 4oyiLTc2ypl7uNrBi/lk0DGr9+Sk8//KkVMyRTXtRV+lMyY872xAzGHFFmkYWtL8 Ms5/EoNbK2z7XZanj9djjoPF4JK3V7tKglyM/N6uEzFGbgpD/3GZbCCpGhAKTMzW ggnHq9W1U5rNZpd7PA3mdvkNJJ06mepNGKyuFhW88XeyetFaSLJ140jiCfFb+F4U Ge70aP5G+T1uLKiMVgL4+SFvBFlZKWDCacm3JDkeMIsqmoaULn0+wd3ZoJyTdW7q mWdV3ftBE6p6GhFiz5vb0jaKLsTXhflbYXOq80jNcvR3CyRy/ei5A== X-ME-Sender: X-ME-Received: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedvvddrgeehgdegvdcutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenuc fjughrpeffhffvuffkfhggtggujgesghdtreertddtjeenucfhrhhomhepmfhlrghushcu lfgvnhhsvghnuceoihhtshesihhrrhgvlhgvvhgrnhhtrdgukheqnecuggftrfgrthhtvg hrnhepjeegudffueeiteekieelkedvueelteevjeduieeludfffeejgeffhfduvdduffek necuvehluhhsthgvrhfuihiivgeptdenucfrrghrrghmpehmrghilhhfrhhomhepihhtsh esihhrrhgvlhgvvhgrnhhtrdgukh X-ME-Proxy: Received: by mail.messagingengine.com (Postfix) with ESMTPA; Wed, 2 Feb 2022 07:38:23 -0500 (EST) Date: Wed, 2 Feb 2022 13:38:21 +0100 From: Klaus Jensen To: Chaitanya Kulkarni Cc: Mikulas Patocka , "linux-block@vger.kernel.org" , "linux-scsi@vger.kernel.org" , "dm-devel@redhat.com" , "linux-nvme@lists.infradead.org" , Javier =?utf-8?B?R29uesOhbGV6?= , linux-fsdevel , Jens Axboe , "msnitzer@redhat.com >> msnitzer@redhat.com" , Bart Van Assche , "martin.petersen@oracle.com >> Martin K. Petersen" , "roland@purestorage.com" , Hannes Reinecke , "kbus @imap.gmail.com>> Keith Busch" , Christoph Hellwig , "Frederick.Knight@netapp.com" , "zach.brown@ni.com" , "osandov@fb.com" , "lsf-pc@lists.linux-foundation.org" , "djwong@kernel.org" , "josef@toxicpanda.com" , "clm@fb.com" , "dsterba@suse.com" , "tytso@mit.edu" , "jack@suse.com" , Kanchan Joshi Subject: Re: [RFC PATCH 3/3] nvme: add the "debug" host driver Message-ID: References: <20220201102122.4okwj2gipjbvuyux@mpHalley-2> <270f30df-f14c-b9e4-253f-bff047d32ff0@nvidia.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="biJ/6P2G5BMLSrxz" Content-Disposition: inline In-Reply-To: <270f30df-f14c-b9e4-253f-bff047d32ff0@nvidia.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220202_043834_552158_67485351 X-CRM114-Status: GOOD ( 17.52 ) 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 --biJ/6P2G5BMLSrxz Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Feb 2 08:00, Chaitanya Kulkarni wrote: > Mikulas, >=20 > On 2/1/22 10:33 AM, Mikulas Patocka wrote: > > External email: Use caution opening links or attachments > >=20 > >=20 > > This patch adds a new driver "nvme-debug". It uses memory as a backing > > store and it is used to test the copy offload functionality. > >=20 > > Signed-off-by: Mikulas Patocka > >=20 >=20 >=20 > NVMe Controller specific memory backed features needs to go into > QEMU which are targeted for testing and debugging, just like what > we have done for NVMe ZNS QEMU support and not in kernel. >=20 > I don't see any special reason to make copy offload an exception. >=20 FWIW the emulated nvme device in QEMU already supports the Copy command. --biJ/6P2G5BMLSrxz Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEUigzqnXi3OaiR2bATeGvMW1PDekFAmH6ezYACgkQTeGvMW1P DelzXwgAgnSeMxSCsGMKZO6Usm9hGbg0gntCPBhyXiv5no4XiYSDSdW+BuiEHxSB rwMYnKqzBYrREbT0L3q5lXXNZZJpS0PDk8VJVLXdb4CWG2MZXMRTviWtuN3aKJJi xlqvrgA4PUXAqJwA6X/CzCmO2cuD/uGTIz08Y/Z8Tp4+kBEqpAUD0awnSRhRaGZd OtcAXe6BKjzB3iZXqAYXL4XKAn+apQIWh9dKPsc20hbg0TGcDvLISWTAqBm6CkSt KzaOTnnYmPXEFds7v/4OD3sHhO7yd+zmIvv8l3zitGCveRgZVu2D/nFVszms0s2r lmvaVEUbaIVS7rRqcTlG0ROMYT80wQ== =T0BG -----END PGP SIGNATURE----- --biJ/6P2G5BMLSrxz--