ci: run memtrack bpf tests on arm runners

Author: not-matthias

.github/workflows/ci.yml

@@ -92,18 +92,21 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [ubuntu-latest]
+        os: [ubuntu-latest, ubuntu-24.04-arm]
         # Each memtrack integration test binary runs its cases serially
         # (eBPF tracker can't overlap with itself in one process), so we
         # shard at the test-binary level to parallelize across jobs.
         test: [c_tests, cpp_tests, rust_tests, spawn_tests, dlopen_tests, rss_tests]
         include:
           # The folio CO-RE relocations in the rmap hooks depend on kernel
-          # struct layouts that changed in 6.18; keep an older-kernel image in
-          # the matrix so the pre-6.18 layout stays covered once ubuntu-latest
-          # moves past it.
+          # struct layouts that changed across versions (folio.flags in 6.18,
+          # pageflags values in 6.10/6.12); keep older-kernel images in the
+          # matrix so the legacy layouts stay covered once the latest images
+          # move past them.
           - os: ubuntu-22.04
             test: rss_tests
+          - os: ubuntu-22.04-arm
+            test: rss_tests
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
         with: