lkml.org 
[lkml]   [2020]   [Mar]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 11/12] task_isolation: kick_all_cpus_sync: don't kick isolated cpus
Date
From: Yuri Norov <ynorov@marvell.com>

Make sure that kick_all_cpus_sync() does not call CPUs that are running
isolated tasks.

Signed-off-by: Alex Belits <abelits@marvell.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
\
 
 \ /
  Last update: 2020-03-04 17:16    [W:0.332 / U:0.504 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site