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Message-Id: <20230728032232.816584-1-paulmck@kernel.org>
Date: Thu, 27 Jul 2023 20:22:31 -0700
From: "Paul E. McKenney" <paulmck@...nel.org>
To: rcu@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, kernel-team@...a.com,
rostedt@...dmis.org, "Paul E. McKenney" <paulmck@...nel.org>,
Dietmar Eggemann <dietmar.eggemann@....com>,
John Stultz <jstultz@...gle.com>,
Josh Triplett <josh@...htriplett.org>,
Joel Fernandes <joel@...lfernandes.org>,
Juri Lelli <juri.lelli@...hat.com>,
Valentin Schneider <vschneid@...hat.com>,
kernel-team@...roid.com
Subject: [PATCH rcu 1/2] torture: Add a kthread-creation callback to _torture_create_kthread()
This commit adds a kthread-creation callback to the
_torture_create_kthread() function, which allows callers of a new
torture_create_kthread_cb() macro to specify a function to be invoked
after the kthread is created but before it is awakened for the first time.
Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
Cc: Dietmar Eggemann <dietmar.eggemann@....com>
Cc: John Stultz <jstultz@...gle.com>
Cc: Josh Triplett <josh@...htriplett.org>
Cc: Joel Fernandes <joel@...lfernandes.org>
Cc: Juri Lelli <juri.lelli@...hat.com>
Cc: Valentin Schneider <vschneid@...hat.com>
Cc: Dietmar Eggemann <dietmar.eggemann@....com>
Cc: kernel-team@...roid.com
---
include/linux/torture.h | 7 +++++--
kernel/torture.c | 6 +++++-
2 files changed, 10 insertions(+), 3 deletions(-)
diff --git a/include/linux/torture.h b/include/linux/torture.h
index 7038104463e4..bb466eec01e4 100644
--- a/include/linux/torture.h
+++ b/include/linux/torture.h
@@ -108,12 +108,15 @@ bool torture_must_stop(void);
bool torture_must_stop_irq(void);
void torture_kthread_stopping(char *title);
int _torture_create_kthread(int (*fn)(void *arg), void *arg, char *s, char *m,
- char *f, struct task_struct **tp);
+ char *f, struct task_struct **tp, void (*cbf)(struct task_struct *tp));
void _torture_stop_kthread(char *m, struct task_struct **tp);
#define torture_create_kthread(n, arg, tp) \
_torture_create_kthread(n, (arg), #n, "Creating " #n " task", \
- "Failed to create " #n, &(tp))
+ "Failed to create " #n, &(tp), NULL)
+#define torture_create_kthread_cb(n, arg, tp, cbf) \
+ _torture_create_kthread(n, (arg), #n, "Creating " #n " task", \
+ "Failed to create " #n, &(tp), cbf)
#define torture_stop_kthread(n, tp) \
_torture_stop_kthread("Stopping " #n " task", &(tp))
diff --git a/kernel/torture.c b/kernel/torture.c
index 8be83fdc6be1..b88a1a86d9da 100644
--- a/kernel/torture.c
+++ b/kernel/torture.c
@@ -932,7 +932,7 @@ EXPORT_SYMBOL_GPL(torture_kthread_stopping);
* it starts, you will need to open-code your own.
*/
int _torture_create_kthread(int (*fn)(void *arg), void *arg, char *s, char *m,
- char *f, struct task_struct **tp)
+ char *f, struct task_struct **tp, void (*cbf)(struct task_struct *tp))
{
int ret = 0;
@@ -944,6 +944,10 @@ int _torture_create_kthread(int (*fn)(void *arg), void *arg, char *s, char *m,
*tp = NULL;
return ret;
}
+
+ if (cbf)
+ cbf(*tp);
+
wake_up_process(*tp); // Process is sleeping, so ordering provided.
torture_shuffle_task_register(*tp);
return ret;
--
2.40.1
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