Maybe I just missed this but can anyone tell me what kernel versions support io_uring. I ran the following test program on 4.19.0 and it is not supported:

Maybe I just missed this but can anyone tell me what kernel versions support io_uring. I ran the following test program on 4.19.0 and it is not supported: #include <stdio.h> #include <stdlib.h> #include <sys/utsname.h> #include <liburing.h> #include <liburing/io_uring.h> static const char *op_strs[] = { "IORING_OP_NOP", "IORING_OP_READV", "IORING_OP_WRITEV", "IORING_OP_FSYNC", "IORING_OP_READ_FIXED", "IORING_OP_WRITE_FIXED", "IORING_OP_POLL_ADD", "IORING_OP_POLL_REMOVE", "IORING_OP_SYNC_FILE_RANGE", "IORING_OP_SENDMSG", "IORING_OP_RECVMSG", "IORING_OP_TIMEOUT", "IORING_OP_TIMEOUT_REMOVE", "IORING_OP_ACCEPT", "IORING_OP_ASYNC_CANCEL", "IORING_OP_LINK_TIMEOUT", "IORING_OP_CONNECT", "IORING_OP_FALLOCATE", "IORING_OP_OPENAT", "IORING_OP_CLOSE", "IORING_OP_FILES_UPDATE", "IORING_OP_STATX", "IORING_OP_READ", "IORING_OP_WRITE", "IORING_OP_FADVISE", "IORING_OP_MADVISE", "IORING_OP_SEND", "IORING_OP_RECV", "IORING_OP_OPENAT2", "IORING_OP_EPOLL_CTL", "IORING_OP_SPLICE", "IORING_OP_PROVIDE_BUFFERS", "IORING_OP_REMOVE_BUFFERS", }; int main() { struct utsname u; uname(&u); struct io_uring_probe *probe = io_uring_get_probe(); if (!probe) { printf("Kernel %s does not support io_uring.\n", u.release); return 0; } printf("List of kernel %s's supported io_uring operations:\n", u.release); for (int i = 0; i < IORING_OP_LAST; i++ ) { const char *answer = io_uring_opcode_supported(probe, i) ? "yes" : "no"; printf("%s: %s\n", op_strs[i], answer); } free(probe); return 0; }