ci: Use latest upstream kernel and exclude scx_flatcg and scx_pair from testing

.github/workflows/build-scheds.yml

@@ -37,10 +37,9 @@ jobs:
       # Install virtme-ng
       - run: pip install virtme-ng
 
-      # Get the latest sched-ext enabled kernel directly from the git
-      # repository (try the sched_ext-ci branch first, if it doesn't exist use
-      # sched_ext)
-      - run: git clone --single-branch -b sched_ext-ci --depth 1 https://github.com/sched-ext/sched_ext.git linux || git clone --single-branch -b sched_ext --depth 1 https://github.com/sched-ext/sched_ext.git linux
+      # Get the latest sched-ext enabled kernel directly from the korg
+      # for-next branch
+      - run: git clone --single-branch -b for-next --depth 1 https://git.kernel.org/pub/scm/linux/kernel/git/tj/sched_ext.git linux
 
       # Print the latest commit of the checked out sched-ext kernel
       - run: cd linux && git log -1 --pretty=format:"%h %ad %s" --date=short

meson-scripts/test_sched

@@ -15,8 +15,10 @@ GUEST_TIMEOUT=60
 # TODO:
 #   - scx_layered: temporarily excluded because it
 #     cannot run with a default configuration
+#   - scx_flatcg, scx_pair: excluded until cgroup support lands upstream
+#   - scx_mitosis: not ready yet
 #
-SCHEDULERS="scx_simple scx_central scx_flatcg scx_nest scx_pair scx_rusty scx_rustland scx_bpfland"
+SCHEDULERS="scx_simple scx_central scx_nest scx_rusty scx_rustland scx_bpfland"
 
 if [ ! -x `which vng` ]; then
     echo "vng not found, please install virtme-ng to enable testing"