This patchset bases on https://patchwork.kernel.org/cover/11769847/, which makes xfstests fsstress and fsx supports IO_URING. The io_uring IOs in fsstress will be run automatically when fsstress get running. But fsx need a special option '-U' to run IO_URING read/write, so add two new cases to xfstests to do fsx buffered and direct IO IO_URING test. [1/3] new helper to require io_uring feature [2/3] fsx buffered IO io_uring test [3/3] fsx direct IO io_uring test And the [2/3] just found an io_uring regression bug (need LVM TEST_DEV): https://bugzilla.kernel.org/show_bug.cgi?id=209243 Feel free to tell me, if you have more suggestions to test io_uring on filesystem. Thanks, Zorro