From 771a92b85a388b751bb9473300ea24c53f54387e Mon Sep 17 00:00:00 2001 From: Zqiang Date: Thu, 24 Aug 2023 16:42:06 +0800 Subject: rcutorture: Traverse possible cpu to set maxcpu in rcu_nocb_toggle() Currently, the maxcpu is set by traversing online CPUs, however, if the rcutorture.onoff_holdoff is set zero and onoff_interval is set non-zero, and the some CPUs with larger cpuid has been offline before setting maxcpu, for these CPUs, even if they are online again, also cannot be offload or deoffload. This can result in rcutorture attempting to (de-)offload CPUs that have never been online, but the (de-)offload code handles this. This commit therefore use for_each_possible_cpu() instead of for_each_online_cpu() in rcu_nocb_toggle(). Signed-off-by: Zqiang Reviewed-by: Frederic Weisbecker Signed-off-by: Paul E. McKenney Signed-off-by: Frederic Weisbecker --- kernel/rcu/rcutorture.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'kernel/rcu') diff --git a/kernel/rcu/rcutorture.c b/kernel/rcu/rcutorture.c index 8136fec0310b..b17ad45cd67e 100644 --- a/kernel/rcu/rcutorture.c +++ b/kernel/rcu/rcutorture.c @@ -2126,7 +2126,7 @@ static int rcu_nocb_toggle(void *arg) VERBOSE_TOROUT_STRING("rcu_nocb_toggle task started"); while (!rcu_inkernel_boot_has_ended()) schedule_timeout_interruptible(HZ / 10); - for_each_online_cpu(cpu) + for_each_possible_cpu(cpu) maxcpu = cpu; WARN_ON(maxcpu < 0); if (toggle_interval > ULONG_MAX) -- cgit