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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 00906C433EF for ; Mon, 2 May 2022 12:16:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239282AbiEBMUA (ORCPT ); Mon, 2 May 2022 08:20:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44244 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1384987AbiEBMTx (ORCPT ); Mon, 2 May 2022 08:19:53 -0400 Received: from esa1.hgst.iphmx.com (esa1.hgst.iphmx.com [68.232.141.245]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 56B7015FD8 for ; Mon, 2 May 2022 05:16:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1651493783; x=1683029783; h=message-id:date:mime-version:subject:from:to:cc: references:in-reply-to:content-transfer-encoding; bh=Mmb6FF+PbRqpffm582WWKWb30Gfw5wn7OBAUJ+Olo/w=; b=WMvJKRUe/RSspfbXQBwUsk77l0Cep54aoTEVxock7jj/NwqwYc0mayNJ XP56jEu3Dr10PJ1SAxdu7iXZbkwlild7taGGb59ruMA8uYSwPoZ3+2tZZ R4DosJI7q957tTfdRuYd2Nyvn2DSOqbit4aKWhXNhPGSzjTxyRdPYKCnt rtdLkzSZZdzBSeektG/iRvFpT7EEYIZlsZ9saRjWbV0cUs5sYUqyQ87Yo F0Xvn1+18bkC/9G/jouf8zQS/6mQ+vP3hajJsf34rB1/37Kuo/Pjq4ZlN /pVi0oCjcW0BvfWNXnRODOMIQbH/zvoJLEIHwekbCLivcnf6q70IIPsrw Q==; X-IronPort-AV: E=Sophos;i="5.91,190,1647273600"; d="scan'208";a="311305190" Received: from h199-255-45-14.hgst.com (HELO uls-op-cesaep01.wdc.com) ([199.255.45.14]) by ob1.hgst.iphmx.com with ESMTP; 02 May 2022 20:16:22 +0800 IronPort-SDR: 1w+5Udh8xA4mf5jhR/aQL/xcoZmNZZ6i97V4MLPiRE7+xUfmF5J1R7fLThJpBbjZ+UqoqOBQT8 HL26dxqrAOk9K+zrM8LQ58SOQKjmLU/5QwgP5NOBdsqm0w1y3eZQr3G1pKjGRcRDz97Mma+MNg OG+VPAT11TJvY1uQUlqTZrdYYhG/lk0+LYc1e9CUYPK+kPO9go624B05kzBANrFSM75uve5XcE irNiiwQnmiq+wt/4CZpEl1/WGXxk8NySoQLTz7wIrDWm8ag8WmwAK5W2ozVNE4aMbSSkrc/jyq ek4QaWjogwFZYrRpYvL3nobS Received: from uls-op-cesaip02.wdc.com ([10.248.3.37]) by uls-op-cesaep01.wdc.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 02 May 2022 04:47:07 -0700 IronPort-SDR: sgkBUKS6jxwnzcGbvWPLFzRMa3pUnYok6BbLUsuxX6tOg3wSUr0rPLVvDmmBbOXlARKPAZRjXr DbHsAUamRG/FzU57rf5tVszKW8heEPCGUS4ips+jD6rGGAnkGZw8dTze3zqziTQRKSzkZSTG7M 6jwaXoLyPuwsXg6YV8v12BUyEKJmXwTwtSNpYEjS0h2amChXnNAySFifoOoll2qCb9NjvmAp6n mHKDrL1JLs2T1n30mAqVDV4Wh0pY6z+8l+AIZZcydenJxD+AjrkIVwLdQKQYjRaf23TWwrSnVF EtU= WDCIronportException: Internal Received: from usg-ed-osssrv.wdc.com ([10.3.10.180]) by uls-op-cesaip02.wdc.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 02 May 2022 05:16:22 -0700 Received: from usg-ed-osssrv.wdc.com (usg-ed-osssrv.wdc.com [127.0.0.1]) by usg-ed-osssrv.wdc.com (Postfix) with ESMTP id 4KsMWp1kSjz1Rvlx for ; Mon, 2 May 2022 05:16:22 -0700 (PDT) Authentication-Results: usg-ed-osssrv.wdc.com (amavisd-new); dkim=pass reason="pass (just generated, assumed good)" header.d=opensource.wdc.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d= opensource.wdc.com; h=content-transfer-encoding:content-type :in-reply-to:organization:references:to:from:content-language :subject:user-agent:mime-version:date:message-id; s=dkim; t= 1651493781; x=1654085782; bh=Mmb6FF+PbRqpffm582WWKWb30Gfw5wn7OBA UJ+Olo/w=; b=ir7xhRFBi2/RFJ2rJ+hllCYGYFtpqylm1j10dApznRoPZPQ28hl bFxjt2sR2vMty9t3G8wk1ut6OemckQ8U6VMIRq2VtOg2zfhifar1rB3x3pahn9u5 zKexf+Sa6EI9PM/Q/jNnMWJTbKRs8jVb7l2ABZ45qOS6mFJxUp7ra6bl/WVe8u7h 8z2yJwAfAoRPRdFULR6BmBI62hIlyIst9jFWTuwVQIYuqcb7gMG2xTRk/ZRHa/gS CkxghkjsBn+XD0zoVQxS52pTzTTXLffRpGReZo/arHkuA29TTc9sn2cO1zNb3Bgk PGASNSJNbtoqjhKwhhdSRGm0N7v7RpbLNJw== X-Virus-Scanned: amavisd-new at usg-ed-osssrv.wdc.com Received: from usg-ed-osssrv.wdc.com ([127.0.0.1]) by usg-ed-osssrv.wdc.com (usg-ed-osssrv.wdc.com [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id 3eRkE_BfNXeF for ; Mon, 2 May 2022 05:16:21 -0700 (PDT) Received: from [10.225.81.200] (hq6rw33.ad.shared [10.225.81.200]) by usg-ed-osssrv.wdc.com (Postfix) with ESMTPSA id 4KsMWn2C5Wz1Rvlc; Mon, 2 May 2022 05:16:21 -0700 (PDT) Message-ID: <84da2486-7a20-f3c7-43e9-60a29c7429fc@opensource.wdc.com> Date: Mon, 2 May 2022 21:16:20 +0900 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:91.0) Gecko/20100101 Thunderbird/91.8.1 Subject: Re: [dm-devel] [PATCH v4 00/10] Add Copy offload support Content-Language: en-US From: Damien Le Moal To: Nitesh Shetty Cc: linux-scsi@vger.kernel.org, nitheshshetty@gmail.com, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, dm-devel@redhat.com, linux-fsdevel@vger.kernel.org References: <20220426101241.30100-1-nj.shetty@samsung.com> <6a85e8c8-d9d1-f192-f10d-09052703c99a@opensource.wdc.com> <20220427124951.GA9558@test-zns> <260b95e8-74bf-9460-cf0d-7e3df1b1a3c7@opensource.wdc.com> Organization: Western Digital Research In-Reply-To: <260b95e8-74bf-9460-cf0d-7e3df1b1a3c7@opensource.wdc.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 2022/05/02 21:14, Damien Le Moal wrote: > On 2022/04/27 21:49, Nitesh Shetty wrote: >> O Wed, Apr 27, 2022 at 11:19:48AM +0900, Damien Le Moal wrote: >>> On 4/26/22 19:12, Nitesh Shetty wrote: >>>> The patch series covers the points discussed in November 2021 virtua= l call >>>> [LSF/MM/BFP TOPIC] Storage: Copy Offload[0]. >>>> We have covered the Initial agreed requirements in this patchset. >>>> Patchset borrows Mikulas's token based approach for 2 bdev >>>> implementation. >>>> >>>> Overall series supports =E2=80=93 >>>> >>>> 1. Driver >>>> - NVMe Copy command (single NS), including support in nvme-target (f= or >>>> block and file backend) >>> >>> It would also be nice to have copy offload emulation in null_blk for = testing. >>> >> >> We can plan this in next phase of copy support, once this series settl= es down. >=20 > Why ? How do you expect people to test simply without null_blk ? Sutre,= you said > QEMU can be used. But if copy offload is not upstream for QEMU either, = there is > no easy way to test. >=20 > Adding that support to null_blk would not be hard at all. Sorry. Replied again to an email I already replied to. vger keep sending = me multiple copies of the same emails... --=20 Damien Le Moal Western Digital Research