This patch turns this 5 second delay into a configurable module
parameter, so users can determine how long to wait in this
pseudo-hibernate state before resuming the system.
The configurable delay parameter has been added to suspend and
synchronized to hibernate.
Example (wait 30 seconds);
# echo 30 > /sys/module/hibernate/parameters/pm_test_delay
# echo core > /sys/power/pm_test
Signed-off-by: Zihuan Zhang <zhangzihuan@xxxxxxxxxx>
---
Documentation/admin-guide/kernel-parameters.txt | 7 +++++++
kernel/power/hibernate.c | 9 +++++++--
2 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index d9fd26b95b34..082a697a3e95 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -6998,6 +6998,13 @@
/sys/power/pm_test). Only available when CONFIG_PM_DEBUG
is set. Default value is 5.
+ hibernate.pm_test_delay=
+ [hibernate]
+ Sets the number of seconds to remain in a suspend test
+ mode before resuming the system (see
+ /sys/power/pm_test). Only available when CONFIG_PM_DEBUG
+ is set. Default value is 5.
+
svm= [PPC]
Format: { on | off | y | n | 1 | 0 }
This parameter controls use of the Protected
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index 23c0f4e6cb2f..da7533aab8d1 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -133,10 +133,15 @@ bool system_entering_hibernation(void)
EXPORT_SYMBOL(system_entering_hibernation);
#ifdef CONFIG_PM_DEBUG
+static unsigned int pm_test_delay = 5;
+module_param(pm_test_delay, uint, 0644);
+MODULE_PARM_DESC(pm_test_delay,
+ "Number of seconds to wait before resuming from hibernate test");
static void hibernation_debug_sleep(void)
{
- pr_info("debug: Waiting for 5 seconds.\n");
- mdelay(5000);
+ pr_info("hibernation debug: Waiting for %d second(s).\n",
+ pm_test_delay);
+ mdelay(pm_test_delay * 1000);
}
static int hibernation_test(int level)
--
2.25.1
