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Petersen" , Bart Van Assche , Mikulas Patocka , linux-scsi@vger.kernel.org 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 Content-Type: text/plain 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 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.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