35 lines
1.0 KiB
Diff
35 lines
1.0 KiB
Diff
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
|
|
Date: Tue, 9 Feb 2016 18:18:01 +0100
|
|
Subject: kernel: migrate_disable() do fastpath in atomic &
|
|
irqs-off
|
|
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.9/older/patches-4.9-rt1.tar.xz
|
|
|
|
With interrupts off it makes no sense to do the long path since we can't
|
|
leave the CPU anyway. Also we might end up in a recursion with lockdep.
|
|
|
|
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
|
|
---
|
|
kernel/sched/core.c | 4 ++--
|
|
1 file changed, 2 insertions(+), 2 deletions(-)
|
|
|
|
--- a/kernel/sched/core.c
|
|
+++ b/kernel/sched/core.c
|
|
@@ -3299,7 +3299,7 @@ void migrate_disable(void)
|
|
{
|
|
struct task_struct *p = current;
|
|
|
|
- if (in_atomic()) {
|
|
+ if (in_atomic() || irqs_disabled()) {
|
|
#ifdef CONFIG_SCHED_DEBUG
|
|
p->migrate_disable_atomic++;
|
|
#endif
|
|
@@ -3326,7 +3326,7 @@ void migrate_enable(void)
|
|
{
|
|
struct task_struct *p = current;
|
|
|
|
- if (in_atomic()) {
|
|
+ if (in_atomic() || irqs_disabled()) {
|
|
#ifdef CONFIG_SCHED_DEBUG
|
|
p->migrate_disable_atomic--;
|
|
#endif
|