rcutorture: Add light-weight SRCU scenario

paulmckrcu · Frederic Weisbecker · commit 930d4e1344f1 · 2024-11-12T15:44:53.000+01:00
This commit adds an rcutorture scenario that tests light-weight SRCU
readers.  While in the area, it adjusts the size of the TREE10 scenario.

Signed-off-by: Paul E. McKenney &lt;paulmck@kernel.org&gt;
Cc: Alexei Starovoitov &lt;ast@kernel.org&gt;
Cc: Andrii Nakryiko &lt;andrii@kernel.org&gt;
Cc: Peter Zijlstra &lt;peterz@infradead.org&gt;
Cc: Kent Overstreet &lt;kent.overstreet@linux.dev&gt;
Cc: &lt;bpf@vger.kernel.org&gt;
Reviewed-by: Neeraj Upadhyay &lt;Neeraj.Upadhyay@amd.com&gt;
Signed-off-by: Frederic Weisbecker &lt;frederic@kernel.org&gt;
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/CFLIST b/tools/testing/selftests/rcutorture/configs/rcu/CFLIST
@@ -5,6 +5,7 @@ TREE04
 TREE05
 TREE07
 TREE09
+SRCU-L
 SRCU-N
 SRCU-P
 SRCU-T
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/SRCU-L b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-L
@@ -0,0 +1,10 @@
+CONFIG_RCU_TRACE=n
+CONFIG_SMP=y
+CONFIG_NR_CPUS=6
+CONFIG_HOTPLUG_CPU=y
+CONFIG_PREEMPT_NONE=y
+CONFIG_PREEMPT_VOLUNTARY=n
+CONFIG_PREEMPT=n
+#CHECK#CONFIG_RCU_EXPERT=n
+CONFIG_KPROBES=n
+CONFIG_FTRACE=n
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/SRCU-L.boot b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-L.boot
@@ -0,0 +1,3 @@
+rcutorture.torture_type=srcu
+rcutorture.reader_flavor=0x4
+rcutorture.fwd_progress=3
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/SRCU-N.boot b/tools/testing/selftests/rcutorture/configs/rcu/SRCU-N.boot
@@ -1,2 +1,3 @@
 rcutorture.torture_type=srcu
+rcutorture.reader_flavor=0x2
 rcutorture.fwd_progress=3
diff --git a/tools/testing/selftests/rcutorture/configs/rcu/TREE10 b/tools/testing/selftests/rcutorture/configs/rcu/TREE10
@@ -1,5 +1,5 @@
 CONFIG_SMP=y
-CONFIG_NR_CPUS=56
+CONFIG_NR_CPUS=74
 CONFIG_PREEMPT_NONE=y
 CONFIG_PREEMPT_VOLUNTARY=n
 CONFIG_PREEMPT=n

-Original file line number
+Diff line change
 TREE05
 TREE07
 TREE09
 +SRCU-L
 SRCU-N
 SRCU-P
 SRCU-T
Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,3 @@`
	`1`	`+rcutorture.torture_type=srcu`
	`2`	`+rcutorture.reader_flavor=0x4`
	`3`	`+rcutorture.fwd_progress=3`
Original file line number	Diff line number	Diff line change
`@@ -1,2 +1,3 @@`
`1`	`1`	`rcutorture.torture_type=srcu`
	`2`	`+rcutorture.reader_flavor=0x2`
`2`	`3`	`rcutorture.fwd_progress=3`