linux-kernel - [PATCH 6/7] torture: Delay CPU-hotplug operations until boot completes

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20250816000837.2622858-6-paulmck@kernel.org>
Date: Fri, 15 Aug 2025 17:08:36 -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>
Subject: [PATCH 6/7] torture: Delay CPU-hotplug operations until boot completes

CPU-hotplug operations invoke stop-machine, which can hog CPUs, which is
not a great thing to do before boot has completed.  This commit therefore
makes the CPU-hotplug operations hold off until boot has completed.

Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
---
 kernel/torture.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/kernel/torture.c b/kernel/torture.c
index 5abb4b25d971cc..1ea9f67953a766 100644
--- a/kernel/torture.c
+++ b/kernel/torture.c
@@ -359,6 +359,8 @@ torture_onoff(void *arg)
 		torture_hrtimeout_jiffies(onoff_holdoff, &rand);
 		VERBOSE_TOROUT_STRING("torture_onoff end holdoff");
 	}
+	while (!rcu_inkernel_boot_has_ended())
+		schedule_timeout_interruptible(HZ / 10);
 	while (!torture_must_stop()) {
 		if (disable_onoff_at_boot && !rcu_inkernel_boot_has_ended()) {
 			torture_hrtimeout_jiffies(HZ / 10, &rand);
-- 
2.40.1