Hi, Get the fio error like below, please have a look if something wrong here, can not reproduce it if remove "--fixedbufs". Kernel repo: https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git Commit: 51b3526f50cf5526b73d06bd44a0f5e3f936fb01 # fio --numjobs=1 --ioengine=io_uring_cmd --runtime='300' --size='300G' --filename=/dev/ng1n1 --rw='randrw' --name='fio_test' --iodepth=64 --bs=8k --group_reporting=1 --cmd_type='nvme' --md_per_io_size='4K' --fixedbufs fio_test: (g=0): rw=randrw, bs=(R) 8192B-8192B, (W) 8192B-8192B, (T) 8192B-8192B, ioengine=io_uring_cmd, iodepth=64 fio-3.38-13-gf241 Starting 1 process fio: io_u error on file /dev/ng1n1: Bad address: read offset=314721697792, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=278937288704, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=211560456192, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=166314262528, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=194210742272, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=314948960256, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=4652392448, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=72851734528, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=105412198400, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=269298982912, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=217188352000, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=182140698624, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=306352644096, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=123246698496, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=4156350464, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=240869728256, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=257956913152, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=157641924608, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=248337874944, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=192326352896, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=59785117696, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=159764578304, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=113134592000, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=162308825088, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=150173917184, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=14641209344, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=271883075584, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=55705149440, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=258477580288, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=34678931456, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=311085285376, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=129028251648, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=195086909440, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=300242763776, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=310458490880, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=91683938304, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=142651342848, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=225977384960, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=271599779840, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=52967882752, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=303015387136, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=273026170880, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=318919712768, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=185858064384, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=291365412864, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=170794999808, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=31619899392, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=240495542272, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=185245155328, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=65555390464, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=290169774080, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=199942692864, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=11003101184, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=147007119360, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=48097304576, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=178375688192, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=138726440960, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=239489859584, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=142543421440, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=73279242240, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: read offset=16768991232, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=252541501440, buflen=8192 fio: io_u error on file /dev/ng1n1: Bad address: write offset=269492428800, buflen=8192 fio: pid=112524, err=14/file:io_u.c:1976, func=io_u error, error=Bad address fio_test: (groupid=0, jobs=1): err=14 (file:io_u.c:1976, func=io_u error, error=Bad address): pid=112524: Mon Nov 11 02:05:53 2024 write: IOPS=35.0k, BW=8000KiB/s (8192kB/s)(8192B/1msec); 0 zone resets slat (nsec): min=576, max=20959, avg=1331.14, stdev=3417.56 clat (nsec): min=59294, max=59294, avg=59294.00, stdev= 0.00 lat (nsec): min=80253, max=80253, avg=80253.00, stdev= 0.00 clat percentiles (nsec): | 1.00th=[59136], 5.00th=[59136], 10.00th=[59136], 20.00th=[59136], | 30.00th=[59136], 40.00th=[59136], 50.00th=[59136], 60.00th=[59136], | 70.00th=[59136], 80.00th=[59136], 90.00th=[59136], 95.00th=[59136], | 99.00th=[59136], 99.50th=[59136], 99.90th=[59136], 99.95th=[59136], | 99.99th=[59136] lat (usec) : 100=1.56% cpu : usr=0.00%, sys=0.00%, ctx=0, majf=0, minf=9 IO depths : 1=1.6%, 2=3.1%, 4=6.2%, 8=12.5%, 16=25.0%, 32=50.0%, >=64=1.6% submit : 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete : 0=0.0%, 4=66.7%, 8=0.0%, 16=0.0%, 32=0.0%, 64=33.3%, >=64=0.0% issued rwts: total=29,35,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0, window=0, percentile=100.00%, depth=64 Run status group 0 (all jobs): WRITE: bw=8000KiB/s (8192kB/s), 8000KiB/s-8000KiB/s (8192kB/s-8192kB/s), io=8192B (8192B), run=1-1msec -- Guangwu Zhang Thanks
