kmemleak: Show the age of an unreferenced object

The jiffies shown for unreferenced objects isn't always meaningful to
people debugging kernel memory leaks. This patch adds the age as well to
the displayed information.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

diff --git a/mm/kmemleak.c b/mm/kmemleak.c
index f06c0921e4721646669d1bcc5d78574949fb3bfd..ce79d91eeef78c1deb8f244335b07fb98f59df12 100644 (file)
--- a/mm/kmemleak.c
+++ b/mm/kmemleak.c
@@ -346,11 +346,13 @@ static void print_unreferenced(struct seq_file *seq,
                               struct kmemleak_object *object)
 {
        int i;
+       unsigned int msecs_age = jiffies_to_msecs(jiffies - object->jiffies);
 
        seq_printf(seq, "unreferenced object 0x%08lx (size %zu):\n",
                   object->pointer, object->size);
-       seq_printf(seq, "  comm \"%s\", pid %d, jiffies %lu\n",
-                  object->comm, object->pid, object->jiffies);
+       seq_printf(seq, "  comm \"%s\", pid %d, jiffies %lu (age %d.%03ds)\n",
+                  object->comm, object->pid, object->jiffies,
+                  msecs_age / 1000, msecs_age % 1000);
        hex_dump_object(seq, object);
        seq_printf(seq, "  backtrace:\n");