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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 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> From: Damien Le Moal Organization: Western Digital Research In-Reply-To: <20220427124951.GA9558@test-zns> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org 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 virtual= 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 (fo= r >>> block and file backend) >> >> It would also be nice to have copy offload emulation in null_blk for t= esting. >> >=20 > We can plan this in next phase of copy support, once this series settle= s down. Why ? How do you expect people to test simply without null_blk ? Sutre, y= ou said QEMU can be used. But if copy offload is not upstream for QEMU either, th= ere is no easy way to test. Adding that support to null_blk would not be hard at all. --=20 Damien Le Moal Western Digital Research