99 lines
3.1 KiB
Diff
99 lines
3.1 KiB
Diff
From 6ce01aa7368b545641a370a0dde81ac0d4c5ba41 Mon Sep 17 00:00:00 2001
|
|
From: Daniel Wagner <wagi@monom.org>
|
|
Date: Tue, 17 Feb 2015 09:37:44 +0100
|
|
Subject: [PATCH 286/328] thermal: Defer thermal wakups to threads
|
|
Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/4.19/older/patches-4.19.106-rt46.tar.xz
|
|
|
|
[ Upstream commit ad2408dc248fe58536eef5b2b5734d8f9d3a280b ]
|
|
|
|
On RT the spin lock in pkg_temp_thermal_platfrom_thermal_notify will
|
|
call schedule while we run in irq context.
|
|
|
|
[<ffffffff816850ac>] dump_stack+0x4e/0x8f
|
|
[<ffffffff81680f7d>] __schedule_bug+0xa6/0xb4
|
|
[<ffffffff816896b4>] __schedule+0x5b4/0x700
|
|
[<ffffffff8168982a>] schedule+0x2a/0x90
|
|
[<ffffffff8168a8b5>] rt_spin_lock_slowlock+0xe5/0x2d0
|
|
[<ffffffff8168afd5>] rt_spin_lock+0x25/0x30
|
|
[<ffffffffa03a7b75>] pkg_temp_thermal_platform_thermal_notify+0x45/0x134 [x86_pkg_temp_thermal]
|
|
[<ffffffff8103d4db>] ? therm_throt_process+0x1b/0x160
|
|
[<ffffffff8103d831>] intel_thermal_interrupt+0x211/0x250
|
|
[<ffffffff8103d8c1>] smp_thermal_interrupt+0x21/0x40
|
|
[<ffffffff8169415d>] thermal_interrupt+0x6d/0x80
|
|
|
|
Let's defer the work to a kthread.
|
|
|
|
Signed-off-by: Daniel Wagner <daniel.wagner@bmw-carit.de>
|
|
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
|
|
[bigeasy: reoder init/denit position. TODO: flush swork on exit]
|
|
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
|
|
---
|
|
drivers/thermal/x86_pkg_temp_thermal.c | 28 +++++++++++++++++++++++++-
|
|
1 file changed, 27 insertions(+), 1 deletion(-)
|
|
|
|
diff --git a/drivers/thermal/x86_pkg_temp_thermal.c b/drivers/thermal/x86_pkg_temp_thermal.c
|
|
index 1ef937d799e4..82f21fd4afb0 100644
|
|
--- a/drivers/thermal/x86_pkg_temp_thermal.c
|
|
+++ b/drivers/thermal/x86_pkg_temp_thermal.c
|
|
@@ -29,6 +29,7 @@
|
|
#include <linux/pm.h>
|
|
#include <linux/thermal.h>
|
|
#include <linux/debugfs.h>
|
|
+#include <linux/kthread.h>
|
|
#include <asm/cpu_device_id.h>
|
|
#include <asm/mce.h>
|
|
|
|
@@ -329,7 +330,7 @@ static void pkg_thermal_schedule_work(int cpu, struct delayed_work *work)
|
|
schedule_delayed_work_on(cpu, work, ms);
|
|
}
|
|
|
|
-static int pkg_thermal_notify(u64 msr_val)
|
|
+static void pkg_thermal_notify_work(struct kthread_work *work)
|
|
{
|
|
int cpu = smp_processor_id();
|
|
struct pkg_device *pkgdev;
|
|
@@ -348,8 +349,32 @@ static int pkg_thermal_notify(u64 msr_val)
|
|
}
|
|
|
|
spin_unlock_irqrestore(&pkg_temp_lock, flags);
|
|
+}
|
|
+
|
|
+#ifdef CONFIG_PREEMPT_RT_FULL
|
|
+static DEFINE_KTHREAD_WORK(notify_work, pkg_thermal_notify_work);
|
|
+
|
|
+static int pkg_thermal_notify(u64 msr_val)
|
|
+{
|
|
+ kthread_schedule_work(¬ify_work);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static void pkg_thermal_notify_flush(void)
|
|
+{
|
|
+ kthread_flush_work(¬ify_work);
|
|
+}
|
|
+
|
|
+#else /* !CONFIG_PREEMPT_RT_FULL */
|
|
+
|
|
+static void pkg_thermal_notify_flush(void) { }
|
|
+
|
|
+static int pkg_thermal_notify(u64 msr_val)
|
|
+{
|
|
+ pkg_thermal_notify_work(NULL);
|
|
return 0;
|
|
}
|
|
+#endif /* CONFIG_PREEMPT_RT_FULL */
|
|
|
|
static int pkg_temp_thermal_device_add(unsigned int cpu)
|
|
{
|
|
@@ -548,6 +573,7 @@ static void __exit pkg_temp_thermal_exit(void)
|
|
platform_thermal_package_rate_control = NULL;
|
|
|
|
cpuhp_remove_state(pkg_thermal_hp_state);
|
|
+ pkg_thermal_notify_flush();
|
|
debugfs_remove_recursive(debugfs);
|
|
kfree(packages);
|
|
}
|
|
--
|
|
2.25.1
|
|
|