fix: allocate only hugepages with size 1Gi

ryan4yin · Jul 29, 2024 · 15a6f4a · 15a6f4a
1 parent 5a6ccd8
commit 15a6f4a
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diff --git a/hosts/k8s/kubevirt-shoryu/default.nix b/hosts/k8s/kubevirt-shoryu/default.nix
@@ -49,4 +49,16 @@ in {
       coreModule
       k3sModule
     ];
+
+  # https://kubernetes.io/docs/tasks/manage-hugepages/scheduling-hugepages/
+  boot.kernelParams = [
+    # disable transparent hugepage(allocate hugepages dynamically)
+    "transparent_hugepage=never"
+
+    # pre-allocate hugepages manually(for kubevirt guest vms)
+    # NOTE: the hugepages allocated here can not be used for other purposes!
+    # so we should left some memory for the host OS
+    "hugepagesz=1G"
+    "hugepages=56"
+  ];
 }
diff --git a/hosts/k8s/kubevirt-shushou/default.nix b/hosts/k8s/kubevirt-shushou/default.nix
@@ -43,4 +43,16 @@ in {
       coreModule
       k3sModule
     ];
+
+  # https://kubernetes.io/docs/tasks/manage-hugepages/scheduling-hugepages/
+  boot.kernelParams = [
+    # disable transparent hugepage(allocate hugepages dynamically)
+    "transparent_hugepage=never"
+
+    # pre-allocate hugepages manually(for kubevirt guest vms)
+    # NOTE: the hugepages allocated here can not be used for other purposes!
+    # so we should left some memory for the host OS
+    "hugepagesz=1G"
+    "hugepages=56"
+  ];
 }
diff --git a/hosts/k8s/kubevirt-youko/default.nix b/hosts/k8s/kubevirt-youko/default.nix
@@ -43,4 +43,16 @@ in {
       coreModule
       k3sModule
     ];
+
+  # https://kubernetes.io/docs/tasks/manage-hugepages/scheduling-hugepages/
+  boot.kernelParams = [
+    # disable transparent hugepage(allocate hugepages dynamically)
+    "transparent_hugepage=never"
+
+    # pre-allocate hugepages manually(for kubevirt guest vms)
+    # NOTE: the hugepages allocated here can not be used for other purposes!
+    # so we should left some memory for the host OS
+    "hugepagesz=1G"
+    "hugepages=18"
+  ];
 }