Hello Guys, I tried to use the following script to run buffered io with io_uring, but looks it always complains with 'Operation not supported', and any idea to make it working? ++ /root/git/fio/fio --readonly --name=onessd --filename=/dev/nvme0n1 --filesize=16m --rw=randread --bs=4k --direct=0 --overwrite=0 --numjobs=1 --iodepth=1 --time_based=1 --runtime=1 --ioengine=io_uring --registerfiles --fixedbufs --hipri=1 --gtod_reduce=1 --group_reporting onessd: (g=0): rw=randread, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=io_uring, iodepth=1 fio-3.25-229-gdf9e8 Starting 1 process fio: io_u error on file /dev/nvme0n1: Operation not supported: read offset=1011712, buflen=4096 fio: pid=3278, err=95/file:io_u.c:1841, func=io_u error, error=Operation not supported onessd: (groupid=0, jobs=1): err=95 (file:io_u.c:1841, func=io_u error, error=Operation not supported): pid=3278: Mon Aug 16 12:01:17 2021 Thanks, Ming
