-----Original Message----- From: SPDK [mailto:spdk-bounces@lists.01.org] On Behalf Of Niu, Yawei Sent: Thursday, October 25, 2018 5:08 PM To: Storage Performance Development Kit <spdk(a)lists.01.org&gt; Subject: [SPDK] spdk_blob_io_unmap() usage Hi, I tried to test spdk_blob_io_unmap() and didn’t get the completion callback (not sure if it because I didn't wait long enough), I checked SPDK source and didn’t see any test case of spdk_blob_io_unmap(), so I was wondering if the unmap is supposed to be executed as fast as blob read/write? Or it's not well supported for certain SSD model? BTW, spdk_blob_io_read/write() works well for me. My SPDK commit: 051297114cb393d3eb1169520d474e81b4215bf0 My SSD model: NVMe Controller at 0000:81:00.0 [8086:2701] ===================================================== Controller Capabilities/Features ================================ Vendor ID: 8086 Subsystem Vendor ID: 8086 Serial Number: PHKS7335003H375AGN Model Number: INTEL SSDPED1K375GA Firmware Version: E2010324 ... Intel Marketing Information ================== Marketing Product Information: Intel (R) Optane (TM) SSD P4800X Series Namespace ID:1 Deallocate: Supported Deallocated/Unwritten Error: Not Supported Deallocated Read Value: Unknown Deallocate in Write Zeroes: Not Supported Deallocated Guard Field: 0xFFFF Flush: Not Supported Reservation: Not Supported Size (in LBAs): 732585168 (698M) Capacity (in LBAs): 732585168 (698M) Utilization (in LBAs): 732585168 (698M) EUI64: E4D25C73F0210100 Thin Provisioning: Not Supported Per-NS Atomic Units: No NGUID/EUI64 Never Reused: No Number of LBA Formats: 7 Thanks -Niu _______________________________________________ SPDK mailing list SPDK(a)lists.01.org https://lists.01.org/mailman/listinfo/spdk