From: "Paul E. McKenney" <paulmck@kernel.org>
To: rcu@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, kernel-team@meta.com,
rostedt@goodmis.org, "Paul E. McKenney" <paulmck@kernel.org>,
Andrii Nakryiko <andrii@kernel.org>,
Alexei Starovoitov <ast@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
bpf@vger.kernel.org
Subject: [PATCH v2 07/21] rcutorture: Test srcu_expedite_current()
Date: Wed, 1 Oct 2025 07:48:18 -0700 [thread overview]
Message-ID: <20251001144832.631770-7-paulmck@kernel.org> (raw)
In-Reply-To: <7fa58961-2dce-4e08-8174-1d1cc592210f@paulmck-laptop>
This commit adds a ->exp_current member to the rcu_torture_ops structure
to test the srcu_expedite_current() function.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: <bpf@vger.kernel.org>
---
kernel/rcu/rcutorture.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c
index 485fa822b6a753..64803d09fc733a 100644
--- a/kernel/rcu/rcutorture.c
+++ b/kernel/rcu/rcutorture.c
@@ -389,6 +389,7 @@ struct rcu_torture_ops {
void (*deferred_free)(struct rcu_torture *p);
void (*sync)(void);
void (*exp_sync)(void);
+ void (*exp_current)(void);
unsigned long (*get_gp_state_exp)(void);
unsigned long (*start_gp_poll_exp)(void);
void (*start_gp_poll_exp_full)(struct rcu_gp_oldstate *rgosp);
@@ -857,6 +858,11 @@ static void srcu_torture_synchronize_expedited(void)
synchronize_srcu_expedited(srcu_ctlp);
}
+static void srcu_torture_expedite_current(void)
+{
+ srcu_expedite_current(srcu_ctlp);
+}
+
static struct rcu_torture_ops srcu_ops = {
.ttype = SRCU_FLAVOR,
.init = rcu_sync_torture_init,
@@ -871,6 +877,7 @@ static struct rcu_torture_ops srcu_ops = {
.deferred_free = srcu_torture_deferred_free,
.sync = srcu_torture_synchronize,
.exp_sync = srcu_torture_synchronize_expedited,
+ .exp_current = srcu_torture_expedite_current,
.same_gp_state = same_state_synchronize_srcu,
.get_comp_state = get_completed_synchronize_srcu,
.get_gp_state = srcu_torture_get_gp_state,
@@ -919,6 +926,7 @@ static struct rcu_torture_ops srcud_ops = {
.deferred_free = srcu_torture_deferred_free,
.sync = srcu_torture_synchronize,
.exp_sync = srcu_torture_synchronize_expedited,
+ .exp_current = srcu_torture_expedite_current,
.same_gp_state = same_state_synchronize_srcu,
.get_comp_state = get_completed_synchronize_srcu,
.get_gp_state = srcu_torture_get_gp_state,
@@ -1698,6 +1706,8 @@ rcu_torture_writer(void *arg)
ulo[i] = cur_ops->get_comp_state();
gp_snap = cur_ops->start_gp_poll();
rcu_torture_writer_state = RTWS_POLL_WAIT;
+ if (cur_ops->exp_current && !torture_random(&rand) % 0xff)
+ cur_ops->exp_current();
while (!cur_ops->poll_gp_state(gp_snap)) {
gp_snap1 = cur_ops->get_gp_state();
for (i = 0; i < ulo_size; i++)
@@ -1718,6 +1728,8 @@ rcu_torture_writer(void *arg)
cur_ops->get_comp_state_full(&rgo[i]);
cur_ops->start_gp_poll_full(&gp_snap_full);
rcu_torture_writer_state = RTWS_POLL_WAIT_FULL;
+ if (cur_ops->exp_current && !torture_random(&rand) % 0xff)
+ cur_ops->exp_current();
while (!cur_ops->poll_gp_state_full(&gp_snap_full)) {
cur_ops->get_gp_state_full(&gp_snap1_full);
for (i = 0; i < rgo_size; i++)
--
2.40.1
next prev parent reply other threads:[~2025-10-01 14:48 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-01 14:48 [PATCH v2 0/21] Implement RCU Tasks Trace in terms of SRCU-fast and optimize Paul E. McKenney
2025-10-01 14:48 ` [PATCH v2 01/21] srcu: Permit Tiny SRCU srcu_read_unlock() with interrupts disabled Paul E. McKenney
2025-10-01 14:48 ` [PATCH v2 02/21] rcu: Re-implement RCU Tasks Trace in terms of SRCU-fast Paul E. McKenney
2025-10-02 15:46 ` Frederic Weisbecker
2025-10-04 9:47 ` Paul E. McKenney
2025-10-07 12:10 ` Frederic Weisbecker
2025-10-07 13:47 ` Paul E. McKenney
2025-10-01 14:48 ` [PATCH v2 03/21] context_tracking: Remove rcu_task_trace_heavyweight_{enter,exit}() Paul E. McKenney
2025-10-01 14:48 ` [PATCH v2 04/21] rcu: Clean up after the SRCU-fastification of RCU Tasks Trace Paul E. McKenney
2025-10-01 14:48 ` [PATCH v2 05/21] rcu: Move rcu_tasks_trace_srcu_struct out of #ifdef CONFIG_TASKS_RCU_GENERIC Paul E. McKenney
2025-10-01 14:48 ` [PATCH v2 06/21] srcu: Create an srcu_expedite_current() function Paul E. McKenney
2025-10-01 14:48 ` Paul E. McKenney [this message]
2025-10-01 14:48 ` [PATCH v2 08/21] rcu: Add noinstr-fast rcu_read_{,un}lock_tasks_trace() APIs Paul E. McKenney
2025-10-02 1:37 ` Alexei Starovoitov
2025-10-02 13:38 ` Paul E. McKenney
2025-10-02 15:56 ` Alexei Starovoitov
2025-10-03 8:07 ` Paul E. McKenney
2025-10-01 14:48 ` [PATCH v2 09/21] rcu: Update Requirements.rst for RCU Tasks Trace Paul E. McKenney
2025-10-01 14:48 ` [PATCH v2 10/21] checkpatch: Deprecate rcu_read_{,un}lock_trace() Paul E. McKenney
2025-10-01 14:48 ` [PATCH v2 11/21] srcu: Create a DEFINE_SRCU_FAST() Paul E. McKenney
2025-10-01 14:48 ` [PATCH v2 12/21] srcu: Create an rcu_tasks_trace_expedite_current() function Paul E. McKenney
2025-10-01 14:48 ` [PATCH v2 13/21] rcutorture: Test rcu_tasks_trace_expedite_current() Paul E. McKenney
2025-10-01 14:48 ` [PATCH v2 14/21] srcu: Make grace-period determination use ssp->srcu_reader_flavor Paul E. McKenney
2025-10-01 14:48 ` [PATCH v2 15/21] rcutorture: Exercise DEFINE_STATIC_SRCU_FAST() and init_srcu_struct_fast() Paul E. McKenney
2025-10-01 14:48 ` [PATCH v2 16/21] refscale: " Paul E. McKenney
2025-10-01 14:48 ` [PATCH v2 17/21] srcu: Require special srcu_struct define/init for SRCU-fast readers Paul E. McKenney
2025-10-01 14:48 ` [PATCH v2 18/21] srcu: Make SRCU-fast readers enforce use of SRCU-fast definition/init Paul E. McKenney
2025-10-01 14:48 ` [PATCH v2 19/21] doc: Update for SRCU-fast definitions and initialization Paul E. McKenney
2025-10-01 14:48 ` [PATCH v2 20/21] tracing: Guard __DECLARE_TRACE() use of __DO_TRACE_CALL() with SRCU-fast Paul E. McKenney
2025-10-01 14:48 ` [PATCH v2 21/21] rcu: Mark diagnostic functions as notrace Paul E. McKenney
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20251001144832.631770-7-paulmck@kernel.org \
--to=paulmck@kernel.org \
--cc=andrii@kernel.org \
--cc=ast@kernel.org \
--cc=bpf@vger.kernel.org \
--cc=kernel-team@meta.com \
--cc=linux-kernel@vger.kernel.org \
--cc=peterz@infradead.org \
--cc=rcu@vger.kernel.org \
--cc=rostedt@goodmis.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
Powered by JetHome