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X-CRM114-Status: GOOD ( 21.66 ) 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 On 22/11/2024 12:13, Christoph Hellwig wrote: > On Thu, Nov 21, 2024 at 09:07:32PM +0000, Paul Webb wrote: >> Christoph: >> To check for weird lazy init code using write zeroes >> >> Values in the 5.15 kernel baseline prior to the commit: >> $ cat /sys/block/nvme*n1/queue/write_zeroes_max_bytes >> 0 >> 0 >> 0 >> 0 >> >> Values in the 6.11 kernel that contains the commit: >> $ cat /sys/block/nvme*n1/queue/write_zeroes_max_bytes >> 2199023255040 >> 2199023255040 >> 2199023255040 >> 2199023255040 > Thanks! So 6.11 actually enables write zeroes for your controller. > >> Another interesting datapoint is that while performing some runs I am >> seeing the following output on the console in the 6.11/6.12 kernels that >> contain the commit: >> >> [  473.398188] operation not supported error, dev nvme2n1, sector 13952 op 0x9:(WRITE_ZEROES) flags 0x800 phys_seg 0 prio class 0 > .. which it doesn't handle well. > >> [  473.534550] nvme0n1: Dataset Management(0x9) @ LBA 14000, 256 blocks, Invalid Command Opcode (sct 0x0 / sc 0x1) DNR > .. and interesting this is for a Deallocate, which should only happen > with the quirk for certain Intel controllers from the very first days of > nvme. > > What controller do you have? Can you post the output of lspci and > "nvme list"? Hi Christoph, The nvme related output from lspci is as follows: $ lspci | grep -i nvme 19:00.0 Non-Volatile memory controller: Intel Corporation NVMe Datacenter SSD [3DNAND, Beta Rock Controller] 20:00.0 Non-Volatile memory controller: Intel Corporation NVMe Datacenter SSD [3DNAND, Beta Rock Controller] 94:00.0 Non-Volatile memory controller: Intel Corporation NVMe Datacenter SSD [3DNAND, Beta Rock Controller] 9b:00.0 Non-Volatile memory controller: Intel Corporation NVMe Datacenter SSD [3DNAND, Beta Rock Controller] $ sudo nvme list Node                  Generic               SN Model                                    Namespace Usage                      Format           FW Rev --------------------- --------------------- -------------------- ---------------------------------------- ---------- -------------------------- ---------------- -------- /dev/nvme0n1          /dev/ng0n1            PHLN942100EQ6P4CGN 7361456_ICRPC2DD2ORA6.4T                 0x1          6.40  TB / 6.40  TB    512   B +  0 B   VDV1RL06 /dev/nvme1n1          /dev/ng1n1            PHLN942100PE6P4CGN 7361456_ICRPC2DD2ORA6.4T                 0x1          6.40  TB / 6.40  TB    512   B +  0 B   VDV1RL06 /dev/nvme2n1          /dev/ng2n1            PHLN9415002B6P4CGN 7361456_ICRPC2DD2ORA6.4T                 0x1          6.40  TB / 6.40  TB    512   B +  0 B   VDV1RL06 /dev/nvme3n1          /dev/ng3n1            PHLN942100DQ6P4CGN 7361456_ICRPC2DD2ORA6.4T                 0x1          6.40  TB / 6.40  TB    512   B +  0 B   VDV1RL06