Hi, Running the following job file with --io_submit_mode=offload set will occasionally give a 'No I/O performed by libaio' error Using the latest FIO version (fio-3.0-48-g83a9) [128k-RR-64k-RW-q1] filename=/dev/sdb direct=1 iodepth=1 rw=randrw bs=128k,64k rwmixread=50 ioengine=libaio io_submit_mode=offload runtime=15m After a few minutes of running FIO will exit with the following message: "No I/O performed by libaio, perhaps try --debug=io option for details" With debug set, I see this near the end of the trace: io 7720 io complete: io_u 0x55e10ee4abc0: off=1304219746304/len=65536/ddir=1io 7720 //dev/sdbio 7720 io 7720 fill_io_u: io_u 0x55e10ee4abc0: off=233107357696/len=0/ddir=0io 7720 //dev/sdbio 7720 io 7720 get_io_u: zero buflen on 0x55e10ee4abc0 io 7720 get_io_u failed io 7720 io_u 0x55e10ee4abc0, setting file failed io 7720 get_io_u failed io 7720 close ioengine libaio io 7720 free ioengine libaio io 7720 close ioengine libaio io 7720 free ioengine libaio Any ideas? Regards, Brandon -- To unsubscribe from this list: send the line "unsubscribe fio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
