diff options
| author | qiwu.chen <qiwuchen55@gmail.com> | 2024-08-07 05:56:27 +0300 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2024-09-02 06:26:04 +0300 |
| commit | 62e73fd85d7bf63f1dde2bbcc464fe67970f326f (patch) | |
| tree | 6e3a5627659071290f4d088b09ada64e4744f096 | |
| parent | 47baed6a132f611228113851a70c73f6e6478d87 (diff) | |
| download | linux-62e73fd85d7bf63f1dde2bbcc464fe67970f326f.tar.xz | |
mm: kfence: print the elapsed time for allocated/freed track
Print the elapsed time for the allocated or freed track, which can be
useful in some debugging scenarios.
Link: https://lkml.kernel.org/r/20240807025627.37419-1-qiwu.chen@transsion.com
Signed-off-by: qiwu.chen <qiwu.chen@transsion.com>
Reviewed-by: Marco Elver <elver@google.com>
Cc: chenqiwu <qiwu.chen@transsion.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | mm/kfence/report.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/mm/kfence/report.c b/mm/kfence/report.c index c509aed326ce..73a6fe42845a 100644 --- a/mm/kfence/report.c +++ b/mm/kfence/report.c @@ -16,6 +16,7 @@ #include <linux/sprintf.h> #include <linux/stacktrace.h> #include <linux/string.h> +#include <linux/sched/clock.h> #include <trace/events/error_report.h> #include <asm/kfence.h> @@ -108,11 +109,14 @@ static void kfence_print_stack(struct seq_file *seq, const struct kfence_metadat const struct kfence_track *track = show_alloc ? &meta->alloc_track : &meta->free_track; u64 ts_sec = track->ts_nsec; unsigned long rem_nsec = do_div(ts_sec, NSEC_PER_SEC); + u64 interval_nsec = local_clock() - meta->alloc_track.ts_nsec; + unsigned long rem_interval_nsec = do_div(interval_nsec, NSEC_PER_SEC); /* Timestamp matches printk timestamp format. */ - seq_con_printf(seq, "%s by task %d on cpu %d at %lu.%06lus:\n", + seq_con_printf(seq, "%s by task %d on cpu %d at %lu.%06lus (%lu.%06lus ago):\n", show_alloc ? "allocated" : "freed", track->pid, - track->cpu, (unsigned long)ts_sec, rem_nsec / 1000); + track->cpu, (unsigned long)ts_sec, rem_nsec / 1000, + (unsigned long)interval_nsec, rem_interval_nsec / 1000); if (track->num_stack_entries) { /* Skip allocation/free internals stack. */ |