[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <9da10e7fdfae23fe397852d40101e8db1f1faf07.camel@marvell.com>
Date: Thu, 9 Apr 2020 15:27:53 +0000
From: Alex Belits <abelits@...vell.com>
To: "frederic@...nel.org" <frederic@...nel.org>,
"rostedt@...dmis.org" <rostedt@...dmis.org>
CC: Prasun Kapoor <pkapoor@...vell.com>,
"mingo@...nel.org" <mingo@...nel.org>,
"davem@...emloft.net" <davem@...emloft.net>,
"linux-api@...r.kernel.org" <linux-api@...r.kernel.org>,
"peterz@...radead.org" <peterz@...radead.org>,
"linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
"catalin.marinas@....com" <catalin.marinas@....com>,
"tglx@...utronix.de" <tglx@...utronix.de>,
"will@...nel.org" <will@...nel.org>,
"linux-arm-kernel@...ts.infradead.org"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: [PATCH v3 12/13] task_isolation: kick_all_cpus_sync: don't kick
isolated cpus
From: Yuri Norov <ynorov@...vell.com>
Make sure that kick_all_cpus_sync() does not call CPUs that are running
isolated tasks.
Signed-off-by: Yuri Norov <ynorov@...vell.com>
[abelits@...vell.com: use safe task_isolation_cpumask() implementation]
Signed-off-by: Alex Belits <abelits@...vell.com>
---
kernel/smp.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/kernel/smp.c b/kernel/smp.c
index 3a8bcbdd4ce6..d9b4b2fedfed 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -731,9 +731,21 @@ static void do_nothing(void *unused)
*/
void kick_all_cpus_sync(void)
{
+ struct cpumask mask;
+
/* Make sure the change is visible before we kick the cpus */
smp_mb();
- smp_call_function(do_nothing, NULL, 1);
+
+ preempt_disable();
+#ifdef CONFIG_TASK_ISOLATION
+ cpumask_clear(&mask);
+ task_isolation_cpumask(&mask);
+ cpumask_complement(&mask, &mask);
+#else
+ cpumask_setall(&mask);
+#endif
+ smp_call_function_many(&mask, do_nothing, NULL, 1);
+ preempt_enable();
}
EXPORT_SYMBOL_GPL(kick_all_cpus_sync);
--
2.20.1
Powered by blists - more mailing lists