test: ensure hugepages allocated

When deploying a kind cluster, ensure we allocate the requested hugepages.

Signed-off-by: Tiago Castro <[email protected]>

Author: tiagolobocastro

.github/workflows/k8s-ci.yml

@@ -1,6 +1,9 @@
 name: K8s CI
 on:
   workflow_call:
+  push:
+    branches:
+      - pytest
 
 jobs:
   k8s-ci:

scripts/k8s/setup-io-prereq.sh

@@ -35,7 +35,13 @@ die() {
 }
 
 setup_hugepages() {
-  $SYSCTL -w vm.nr_hugepages="$1"
+  local wanted="$1"
+  $SYSCTL -w vm.nr_hugepages="$wanted"
+  local actual
+  actual=$($SYSCTL -b vm.nr_hugepages)
+  if [ "$actual" != "$wanted" ]; then
+    die "Wanted $wanted hugepages, but only allocated $actual hugepages"
+  fi
 }
 
 modprobe_nvme_tcp() {
@@ -99,7 +105,7 @@ while [ "$#" -gt 0 ]; do
 done
 
 if [ -n "$HUGE_PAGES" ]; then
-  pages=$(sysctl -b vm.nr_hugepages)
+  pages=$($SYSCTL -b vm.nr_hugepages)
 
   if [ "$HUGE_PAGES" -gt "$pages" ]; then
     setup_hugepages "$HUGE_PAGES"