From c3d0258d5af2a50529e8928fe458344e38653d25 Mon Sep 17 00:00:00 2001
From: "Paul E. McKenney" <paulmck@kernel.org>
Date: Wed, 14 Jul 2021 06:53:51 -0700
Subject: [PATCH] scftorture: Count reschedule IPIs
Git-commit: c3d0258d5af2a50529e8928fe458344e38653d25
References: git-fixes
Patch-mainline: v5.16-rc1
Currently, only those IPIs that invoke scftorture's scf_handler()
IPI handler function are counted. This means that runs exercising
only scftorture.weight_resched will look like they have made no forward
progress, resulting in "GP HANG" complaints from the rcutorture scripting.
This commit therefore increments the scf_invoked_count per-CPU counter
immediately after calling resched_cpu().
Fixes: 1ac78b49d61d4 ("scftorture: Add an alternative IPI vector")
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Signed-off-by: Oliver Neukum <oneukum@suse.com>
---
kernel/scftorture.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/kernel/scftorture.c b/kernel/scftorture.c
index 74348abc792b..00bba2bdd4d1 100644
--- a/kernel/scftorture.c
+++ b/kernel/scftorture.c
@@ -341,6 +341,7 @@ static void scftorture_invoke_one(struct scf_statistics *scfp, struct torture_ra
cpu = torture_random(trsp) % nr_cpu_ids;
scfp->n_resched++;
resched_cpu(cpu);
+ this_cpu_inc(scf_invoked_count);
}
break;
case SCF_PRIM_SINGLE:
--
2.41.0