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authorDietmar Eggemann <dietmar.eggemann@arm.com>2023-06-02 22:02:10 +0000
committerPaul E. McKenney <paulmck@kernel.org>2023-08-14 15:01:07 -0700
commit5d248bb39fe1388943acb6510f8f48fa5570e0ec (patch)
tree57c9dfa277a5cf58bfd9f4ef16daf220dc09a417 /kernel/torture.c
parent67d5404d274376890d6d095a10e6565854918f8e (diff)
torture: Add lock_torture writer_fifo module parameter
This commit adds a module parameter that causes the locktorture writer to run at real-time priority. To use it: insmod /lib/modules/torture.ko random_shuffle=1 insmod /lib/modules/locktorture.ko torture_type=mutex_lock rt_boost=1 rt_boost_factor=50 nested_locks=3 writer_fifo=1 ^^^^^^^^^^^^^ A predecessor to this patch has been helpful to uncover issues with the proxy-execution series. [ paulmck: Remove locktorture-specific code from kernel/torture.c. ] Cc: "Paul E. McKenney" <paulmck@kernel.org> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Joel Fernandes <joel@joelfernandes.org> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Valentin Schneider <vschneid@redhat.com> Cc: kernel-team@android.com Signed-off-by: Dietmar Eggemann <dietmar.eggemann@arm.com> [jstultz: Include header change to build, reword commit message] Signed-off-by: John Stultz <jstultz@google.com> Acked-by: Davidlohr Bueso <dave@stgolabs.net> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/torture.c')
-rw-r--r--kernel/torture.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/torture.c b/kernel/torture.c
index b88a1a86d9da..a1ac493488e2 100644
--- a/kernel/torture.c
+++ b/kernel/torture.c
@@ -37,6 +37,7 @@
#include <linux/ktime.h>
#include <asm/byteorder.h>
#include <linux/torture.h>
+#include <linux/sched/rt.h>
#include "rcu/rcu.h"
MODULE_LICENSE("GPL");
@@ -734,7 +735,7 @@ bool stutter_wait(const char *title)
cond_resched_tasks_rcu_qs();
spt = READ_ONCE(stutter_pause_test);
for (; spt; spt = READ_ONCE(stutter_pause_test)) {
- if (!ret) {
+ if (!ret && !rt_task(current)) {
sched_set_normal(current, MAX_NICE);
ret = true;
}