v6.9-scx1-rc7

.github/workflows/run-schedulers

@@ -16,6 +16,26 @@ if [ ! -x `which vng` ]; then
     exit 1
 fi
 
+function runtest() {
+    local bin="${1}"
+
+    if [ -z "${bin}" ]; then
+        echo "No binary passed to runtest"
+        exit 1
+    fi
+
+    if ! [ -f "${bin}" ]; then
+        echo "Binary ${bin} was not a regular file"
+        exit 1
+    fi
+
+    rm -f /tmp/output
+    (timeout --foreground --preserve-status ${GUEST_TIMEOUT} \
+        vng --force-9p --verbose -- \
+            "timeout --foreground --preserve-status ${TEST_TIMEOUT} ${bin}" \
+                2>&1 </dev/null || true) | tee /tmp/output
+}
+
 # Test all the available schedulers.
 #
 # NOTE: virtme-ng automatically runs the kernel from the current working
@@ -24,23 +44,14 @@ fi
 # Each scheduler will be tested in a separate instance booted from scratch, to
 # ensure that each run does not impact the others.
 #
-# TODO: exclude scx_layered for now, because it requires a special config
-# file, otherwise its test would fail with "Error: No layer spec".
-#
-# Maybe in the future change scx_layered to run with a default layer spec, just
-# for testing it.
-#
-for sched in $(find tools/sched_ext/build/bin -type f -executable | grep -v scx_layered); do
-    rm -f /tmp/output
-    (timeout --foreground --preserve-status ${GUEST_TIMEOUT} \
-        vng --force-9p --disable-microvm --verbose -- \
-            "timeout --foreground --preserve-status ${TEST_TIMEOUT} ${sched}" \
-                2>&1 </dev/null || true) | tee /tmp/output
-    sed -n -e '/\bBUG:/q1' \
-           -e '/\bWARNING:/q1' \
-           -e '/\berror\b/Iq1' \
-           -e '/\bstall/Iq1' \
-           -e '/\btimeout\b/Iq1' /tmp/output
+for sched in $(find tools/sched_ext/build/bin -type f -executable); do
+    runtest "${sched}"
+    grep -v " Speculative Return Stack Overflow" /tmp/output | \
+        sed -n -e '/\bBUG:/q1' \
+            -e '/\bWARNING:/q1' \
+            -e '/\berror\b/Iq1' \
+            -e '/\bstall/Iq1' \
+            -e '/\btimeout\b/Iq1'
     res=$?
     if [ ${res} -ne 0 ]; then
         echo "FAIL: ${sched}"
@@ -49,3 +60,14 @@ for sched in $(find tools/sched_ext/build/bin -type f -executable | grep -v scx_
         echo "OK: ${sched}"
     fi
 done
+
+# Run the selftests suite
+runtest "tools/testing/selftests/sched_ext/runner"
+sed -n -e '/not ok/q1' /tmp/output
+res=$?
+if [ ${res} -ne 0 ]; then
+	echo "FAIL: selftests"
+	echo "output: $(cat /tmp/output)"
+else
+	echo "OK: selftests"
+fi

.github/workflows/test-kernel.yml

@@ -16,7 +16,7 @@ jobs:
       ### DOWNLOAD AND INSTALL DEPENDENCIES ###
 
       # Download dependencies packaged by Ubuntu
-      - run: sudo apt -y install gcc make git coreutils cmake elfutils libelf-dev libunwind-dev libzstd-dev linux-headers-generic linux-tools-common linux-tools-generic ninja-build python3-pip python3-requests qemu-kvm udev iproute2 busybox-static libvirt-clients kbd kmod file rsync zstd pahole flex bison cpio libcap-dev libelf-dev python3-dev cargo rustc
+      - run: sudo apt -y install bc gcc make git coreutils cmake elfutils libelf-dev libunwind-dev libzstd-dev linux-headers-generic linux-tools-common linux-tools-generic ninja-build python3-pip python3-requests qemu-kvm udev iproute2 busybox-static libvirt-clients kbd kmod file rsync zstd pahole flex bison cpio libcap-dev libelf-dev python3-dev cargo rustc gcc-multilib
 
       # clang 17
       # Use a custom llvm.sh script which includes the -y flag for
@@ -40,8 +40,17 @@ jobs:
       # Build a minimal kernel (with sched-ext enabled) using virtme-ng
       - run: vng -v --build --config .github/workflows/sched-ext.config
 
+      # Build the selftests suite
+      - run: make -j $(nproc) -C tools/testing/selftests/sched_ext
+
       # Build the in-kernel schedulers
-      - run: cd tools/sched_ext && make
+      - run: make -j $(nproc) -C tools/sched_ext
+
+      # Setup KVM support
+      - run: |
+          echo 'KERNEL=="kvm", GROUP="kvm", MODE="0666", OPTIONS+="static_node=kvm"' | sudo tee /etc/udev/rules.d/99-kvm4all.rules
+          sudo udevadm control --reload-rules
+          sudo udevadm trigger --name-match=kvm
 
       # Test the schedulers inside the recompile kernel
       - run: .github/workflows/run-schedulers

.mailmap

@@ -38,6 +38,16 @@ Alexei Starovoitov <[email protected]> <[email protected]>
 Alexei Starovoitov <[email protected]> <[email protected]>
 Alexei Starovoitov <[email protected]> <[email protected]>
 Alexey Makhalov <[email protected]> <[email protected]>
+Alex Elder <[email protected]>
+Alex Elder <[email protected]> <[email protected]>
+Alex Elder <[email protected]> <[email protected]>
+Alex Elder <[email protected]> <[email protected]>
+Alex Elder <[email protected]> <[email protected]>
+Alex Elder <[email protected]> <[email protected]>
+Alex Elder <[email protected]> <[email protected]>
+Alex Elder <[email protected]> <[email protected]>
+Alex Elder <[email protected]> <[email protected]>
+Alex Elder <[email protected]> <[email protected]>
 Alex Hung <[email protected]> <[email protected]>
 Alex Shi <[email protected]> <[email protected]>
 Alex Shi <[email protected]> <[email protected]>
@@ -98,6 +108,8 @@ Ben Widawsky <[email protected]> <[email protected]>
 Ben Widawsky <[email protected]> <[email protected]>
 Ben Widawsky <[email protected]> <[email protected]>
 Benjamin Poirier <[email protected]> <[email protected]>
+Benjamin Tissoires <[email protected]> <[email protected]>
+Benjamin Tissoires <[email protected]> <[email protected]>
 Bjorn Andersson <[email protected]> <[email protected]>
 Bjorn Andersson <[email protected]> <[email protected]>
 Bjorn Andersson <[email protected]> <[email protected]>
@@ -500,6 +512,7 @@ Praveen BP <[email protected]>
 Pradeep Kumar Chitrapu <[email protected]> <[email protected]>
 Prasad Sodagudi <[email protected]> <[email protected]>
 Punit Agrawal <[email protected]> <[email protected]>
+Puranjay Mohan <[email protected]> <[email protected]>
 Qais Yousef <[email protected]> <[email protected]>
 Qais Yousef <[email protected]> <[email protected]>
 Quentin Monnet <[email protected]> <[email protected]>

Documentation/admin-guide/kernel-parameters.txt

@@ -3423,6 +3423,9 @@
 			arch-independent options, each of which is an
 			aggregation of existing arch-specific options.
 
+			Note, "mitigations" is supported if and only if the
+			kernel was built with CPU_MITIGATIONS=y.
+
 			off
 				Disable all optional CPU mitigations.  This
 				improves system performance, but it may also