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 X-Spam-Level: X-Spam-Status: No, score=-3.7 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 05973C433FE for ; Wed, 9 Dec 2020 03:04:46 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 97D9E2389E for ; Wed, 9 Dec 2020 03:04:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 97D9E2389E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=oracle.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:Date:References:Message-ID:In-Reply-To: From:Subject:To:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=hExmrBF6NEYMXSetis0Sa1+n/F16Qk3v39Mr45oTLn0=; b=rfyh4E5it1TZIUFQd/4gLzaw1 yo9TRp60M2+wgDp0ZTCZTzhyYGG3dEpnt801uQITCxl1HK8lAkqQxih4bKmx7tglsCnZy2zIHLLD4 7OqQRw35M8bOIlFSczOx5y9++IR4KS/KIZ18MFprO20d/F81H2MVFCdUpfuWw1r/61nZlYutQvaXh goLz3lOtoKwuWvTm8e0d+EcmVp2uqj2TIDgZp1Qubw7Ty2wOes3epNN5tOExdANO0teuUaCO+GFH+ 622KVdfubbUNRY06IFhgTXtpfQXc2BVQISExsAJ6hO5pkRKon8AxS7MHYc44boC3uGpZ4knzKuNtV sTdXrxlHQ==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1kmpmR-0001DU-Pb; Wed, 09 Dec 2020 03:04:39 +0000 Received: from userp2130.oracle.com ([156.151.31.86]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1kmpmP-0001D4-Gb for linux-nvme@lists.infradead.org; Wed, 09 Dec 2020 03:04:38 +0000 Received: from pps.filterd (userp2130.oracle.com [127.0.0.1]) by userp2130.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 0B933vWE013387; Wed, 9 Dec 2020 03:04:27 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=to : cc : subject : from : in-reply-to : message-id : references : date : mime-version : content-type; s=corp-2020-01-29; bh=im6KM1TeupZ7+OOqaL16g9WQ+py93dKnhY0FXeXUVrg=; b=CgT2u9G+DufvhAow7IPt573MPTsgelj/WTscwwx8qiipLPEte677SGvrA95oyHIIFtj1 +3aR1DPmDfiFXTj8R7jfEEoEGfhshcE9Gx3L6Uo+9pfEEoMODoRGJZT0Lcj6RhSkp4Cb WIFVPvCeWshgSTiRQt7KK9u8u1zZCjvG0ImXHSnNpCGrIkXXRIuo+LM0uAL3AuMP+l3c gfAF4QZAXkme6Ee3vL2DjCy2x/3J9GHF7wL6u6tyPA+OqvqYgnAX0CbRpsEILyu//66a J/RvZqMLg7j+p1VGXFJgqMeh0BMS4ue9hQpCCkOzcvS02jsee+Wj38jGCf3JKgAapMr0 NA== Received: from userp3030.oracle.com (userp3030.oracle.com [156.151.31.80]) by userp2130.oracle.com with ESMTP id 3581mqwxu4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 09 Dec 2020 03:04:26 +0000 Received: from pps.filterd (userp3030.oracle.com [127.0.0.1]) by userp3030.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 0B92tiw1007609; Wed, 9 Dec 2020 03:04:26 GMT Received: from aserv0122.oracle.com (aserv0122.oracle.com [141.146.126.236]) by userp3030.oracle.com with ESMTP id 358m4yujv1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 09 Dec 2020 03:04:26 +0000 Received: from abhmp0019.oracle.com (abhmp0019.oracle.com [141.146.116.25]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 0B934MK3021556; Wed, 9 Dec 2020 03:04:22 GMT Received: from ca-mkp.ca.oracle.com (/10.159.214.123) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 08 Dec 2020 19:04:20 -0800 To: Hannes Reinecke Subject: Re: [RFC PATCH v2 0/2] add simple copy support From: "Martin K. Petersen" In-Reply-To: <01fe46ac-16a5-d4db-f23d-07a03d3935f3@suse.de> (Hannes Reinecke's message of "Mon, 7 Dec 2020 15:56:15 +0100") Organization: Oracle Corporation Message-ID: References: <20201204094659.12732-1-selvakuma.s1@samsung.com> <20201207141123.GC31159@lst.de> <01fe46ac-16a5-d4db-f23d-07a03d3935f3@suse.de> Date: Tue, 08 Dec 2020 22:02:35 -0500 MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9829 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxscore=0 spamscore=0 suspectscore=1 bulkscore=0 malwarescore=0 phishscore=0 adultscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012090018 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9829 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=1 mlxlogscore=999 clxscore=1011 malwarescore=0 priorityscore=1501 adultscore=0 lowpriorityscore=0 phishscore=0 spamscore=0 impostorscore=0 mlxscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012090019 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201208_220437_709596_DBDBF93C X-CRM114-Status: GOOD ( 14.30 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: axboe@kernel.dk, damien.lemoal@wdc.com, SelvaKumar S , sagi@grimberg.me, snitzer@redhat.com, selvajove@gmail.com, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, nj.shetty@samsung.com, linux-block@vger.kernel.org, dm-devel@redhat.com, Mikulas Patocka , joshi.k@samsung.com, "Martin K. Petersen" , kbusch@kernel.org, javier.gonz@samsung.com, linux-scsi@vger.kernel.org, Christoph Hellwig , Bart Van Assche 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 Hannes, [Sorry I'm late to the discussion here, had a few fires going in addition to the end of the kernel cycle] > And we shouldn't forget that the main issue which killed all previous > implementations was a missing QoS guarantee. That and the fact that our arbitrary stacking situation was hard to resolve. The QoS guarantee was somewhat addressed by Fred in T10. But I agree we need some sort of toggle. -- Martin K. Petersen Oracle Linux Engineering _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme