@@ -1828,6 +1828,13 @@
lz4: Select LZ4 compression algorithm to
compress/decompress hibernation image.
+ hibernate.pm_test_delay=
+ [HIBERNATION]
+ Sets the number of seconds to remain in a hibernation test
+ mode before resuming the system (see
+ /sys/power/pm_test). Only available when CONFIG_PM_DEBUG
+ is set. Default value is 5.
+
highmem=nn[KMG] [KNL,BOOT,EARLY] forces the highmem zone to have an exact
size of <nn>. This works even on boxes that have no
highmem otherwise. This also works to reduce highmem
@@ -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 hibernation 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)
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 hibernation. 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@kylinos.cn> --- v3: - Fix the location of the hibernate.pm_test_delay parameter in kernel-parameters.txt. - Update ‘[hibernate]’ to ‘[HIBERNATION]’ v2: - Fix typos. --- Documentation/admin-guide/kernel-parameters.txt | 7 +++++++ kernel/power/hibernate.c | 9 +++++++-- 2 files changed, 14 insertions(+), 2 deletions(-)