From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org,
linux-rt-users <linux-rt-users@vger.kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Carsten Emde <C.Emde@osadl.org>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
John Kacur <jkacur@redhat.com>,
Paul Gortmaker <paul.gortmaker@windriver.com>
Subject: [PATCH RT 06/13] kernel: migrate_disable() do fastpath in atomic & irqs-off
Date: Wed, 02 Mar 2016 10:48:53 -0500 [thread overview]
Message-ID: <20160302154904.530141180@goodmis.org> (raw)
In-Reply-To: 20160302154847.937325532@goodmis.org
[-- Attachment #1: 0006-kernel-migrate_disable-do-fastpath-in-atomic-irqs-of.patch --]
[-- Type: text/plain, Size: 1105 bytes --]
3.12.54-rt74-rc1 stable review patch.
If anyone has any objections, please let me know.
------------------
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
kernel/sched/core.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index a936937c3535..d02b025f434c 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2429,7 +2429,7 @@ 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
@@ -2463,7 +2463,7 @@ void migrate_enable(void)
unsigned long flags;
struct rq *rq;
- if (in_atomic()) {
+ if (in_atomic() || irqs_disabled()) {
#ifdef CONFIG_SCHED_DEBUG
p->migrate_disable_atomic--;
#endif
--
2.7.0
next prev parent reply other threads:[~2016-03-02 15:48 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-02 15:48 [PATCH RT 00/13] Linux 3.12.54-rt74-rc1 Steven Rostedt
2016-03-02 15:48 ` [PATCH RT 01/13] ptrace: dont open IRQs in ptrace_freeze_traced() too early Steven Rostedt
2016-03-02 15:48 ` [PATCH RT 02/13] preempt-lazy: Add the lazy-preemption check to preempt_schedule() Steven Rostedt
2016-03-02 15:48 ` [PATCH RT 03/13] softirq: split timer softirqs out of ksoftirqd Steven Rostedt
2016-03-02 15:48 ` [PATCH RT 04/13] net: provide a way to delegate processing a softirq to ksoftirqd Steven Rostedt
2016-03-02 15:48 ` [PATCH RT 05/13] latencyhist: disable jump-labels Steven Rostedt
2016-03-02 15:48 ` Steven Rostedt [this message]
2016-03-02 15:48 ` [PATCH RT 07/13] kernel: softirq: unlock with irqs on Steven Rostedt
2016-03-02 15:48 ` [PATCH RT 08/13] kernel/stop_machine: partly revert "stop_machine: Use raw spinlocks" Steven Rostedt
2016-03-02 15:48 ` [PATCH RT 09/13] sched,rt: __always_inline preemptible_lazy() Steven Rostedt
2016-03-02 15:48 ` [PATCH RT 10/13] trace: Use rcuidle version for preemptoff_hist trace point Steven Rostedt
2016-03-02 15:48 ` [PATCH RT 11/13] rcu/torture: Comment out rcu_bh ops on PREEMPT_RT_FULL Steven Rostedt
2016-03-02 15:48 ` [PATCH RT 12/13] kernel: sched: Fix preempt_disable_ip recodring for preempt_disable() Steven Rostedt
2016-03-02 15:49 ` [PATCH RT 13/13] Linux 3.12.54-rt74-rc1 Steven Rostedt
2016-03-04 4:04 ` [PATCH RT 14/13] tracing: Fix probe_wakeup_latency_hist_start() prototype Mike Galbraith
2016-03-07 19:42 ` Steven Rostedt
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