[GitHub] [cloudstack] rohityadavcloud commented on a diff in pull request #6399: [KVM] Enable IOURING only when it is available on the host

[GitBox <gi...@apache.org>]

rohityadavcloud commented on code in PR #6399:
URL: https://github.com/apache/cloudstack/pull/6399#discussion_r877878361


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plugins/hypervisors/kvm/src/main/java/com/cloud/hypervisor/kvm/resource/LibvirtComputingResource.java:
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@@ -2949,6 +2949,33 @@ private KVMPhysicalDisk getPhysicalDiskPrimaryStore(PrimaryDataStoreTO primaryDa
         return storagePool.getPhysicalDisk(data.getPath());
     }
 
+    /**
+     * Check if IO_URING is supported by qemu
+     */
+    protected boolean isIoUringSupportedByQemu() {
+        s_logger.debug("Checking if iouring is supported");
+        String command = getIoUringCheckCommand();
+        if (org.apache.commons.lang3.StringUtils.isBlank(command)) {
+            s_logger.debug("Could not check iouring support, disabling it");
+            return false;
+        }
+        int exitValue = executeBashScriptAndRetrieveExitValue(command);
+        return exitValue == 0;
+    }
+
+    protected String getIoUringCheckCommand() {
+        String[] qemuPaths = {"/usr/bin/qemu-system-x86_64", "/usr/libexec/qemu-kvm", "/usr/bin/qemu-kvm" };
+        for (String qemuPath : qemuPaths) {
+            File file = new File(qemuPath);
+            if (file.exists()) {
+                String cmd = String.format("ldd %s | grep -Eqe '[[:space:]]liburing\\.so'", qemuPath);

Review Comment:
   is this reliable @nvazquez cc others?



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