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PM / timekeeping: Print debug messages when requested

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The messages printed by tk_debug_account_sleep_time() are basically
useful for system sleep debugging, so print them only when the other
debug messages from the core suspend/hibernate code are enabled.

While at it, make it clear that the messages from
tk_debug_account_sleep_time() are about timekeeping suspend
duration, because in general timekeeping may be suspeded and
resumed for multiple times during one system suspend-resume cycle.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Rafael J. Wysocki 2017-07-23 00:03:43 +02:00
parent 8915aa2042
commit cb08e0353c
3 changed files with 18 additions and 7 deletions
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5
kernel/time/timekeeping_debug.c
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@ -19,6 +19,7 @@
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/seq_file.h>
#include <linux/suspend.h>
#include <linux/time.h>
#include "timekeeping_internal.h"
@ -75,7 +76,7 @@ void tk_debug_account_sleep_time(struct timespec64 *t)
int bin = min(fls(t->tv_sec), NUM_BINS-1);
sleep_time_bin[bin]++;
printk_deferred(KERN_INFO "Suspended for %lld.%03lu seconds\n",
(s64)t->tv_sec, t->tv_nsec / NSEC_PER_MSEC);
pm_deferred_pr_dbg("Timekeeping suspended for %lld.%03lu seconds\n",
(s64)t->tv_sec, t->tv_nsec / NSEC_PER_MSEC);
}