2020-04-21 20:13:52 +00:00
|
|
|
From 1c66a5b365296bd3b4ebb2be7eef2d8ba7688414 Mon Sep 17 00:00:00 2001
|
2020-02-21 18:07:43 +00:00
|
|
|
From: Scott Wood <swood@redhat.com>
|
|
|
|
|
Date: Sat, 27 Jul 2019 00:56:32 -0500
|
2020-04-21 20:13:52 +00:00
|
|
|
Subject: [PATCH 300/325] sched: __set_cpus_allowed_ptr: Check cpus_mask, not
|
2020-02-21 18:07:43 +00:00
|
|
|
cpus_ptr
|
2020-04-21 20:13:52 +00:00
|
|
|
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.115-rt48.tar.xz
|
2020-02-21 18:07:43 +00:00
|
|
|
|
|
|
|
|
[ Upstream commit e5606fb7b042db634ed62b4dd733d62e050e468f ]
|
|
|
|
|
|
|
|
|
|
This function is concerned with the long-term cpu mask, not the
|
|
|
|
|
transitory mask the task might have while migrate disabled. Before
|
|
|
|
|
this patch, if a task was migrate disabled at the time
|
|
|
|
|
__set_cpus_allowed_ptr() was called, and the new mask happened to be
|
|
|
|
|
equal to the cpu that the task was running on, then the mask update
|
|
|
|
|
would be lost.
|
|
|
|
|
|
|
|
|
|
Signed-off-by: Scott Wood <swood@redhat.com>
|
|
|
|
|
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
|
|
|
|
|
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
|
|
|
|
|
---
|
|
|
|
|
kernel/sched/core.c | 2 +-
|
|
|
|
|
1 file changed, 1 insertion(+), 1 deletion(-)
|
|
|
|
|
|
|
|
|
|
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
|
|
|
|
|
index 3413b9ebef1f..d6bd8129a390 100644
|
|
|
|
|
--- a/kernel/sched/core.c
|
|
|
|
|
+++ b/kernel/sched/core.c
|
|
|
|
|
@@ -1157,7 +1157,7 @@ static int __set_cpus_allowed_ptr(struct task_struct *p,
|
|
|
|
|
goto out;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
- if (cpumask_equal(p->cpus_ptr, new_mask))
|
|
|
|
|
+ if (cpumask_equal(&p->cpus_mask, new_mask))
|
|
|
|
|
goto out;
|
|
|
|
|
|
|
|
|
|
dest_cpu = cpumask_any_and(cpu_valid_mask, new_mask);
|
|
|
|
|
--
|
2020-04-09 19:44:24 +00:00
|
|
|
2.25.1
|
2020-02-21 18:07:43 +00:00
|
|
|
|
