Merge "mm: slub: update slab_alloc interface to capture slab stacks" (f4aa4355) · Commits · e / devices / android_kernel_fairphone_FP5

mm/slub.c

+22 −0

Original line number	Diff line number	Diff line
		@@ -4568,6 +4568,9 @@ struct location {
		long max_pid;
		DECLARE_BITMAP(cpus, NR_CPUS);
		nodemask_t nodes;
		#ifdef CONFIG_STACKTRACE
		unsigned long addrs[TRACK_ADDRS_COUNT]; /* Called from address */
		#endif
		};

		struct loc_track {
		@@ -4610,6 +4613,7 @@ static int add_location(struct loc_track t, struct kmem_cache s,
		struct location *l;
		unsigned long caddr;
		unsigned long age = jiffies - track->when;
		unsigned int i = 0;

		start = -1;
		end = t->count;
		@@ -4667,6 +4671,15 @@ static int add_location(struct loc_track t, struct kmem_cache s,
		t->count++;
		l->count = 1;
		l->addr = track->addr;
		#ifdef CONFIG_STACKTRACE
		for (i = 0; i < TRACK_ADDRS_COUNT; i++)
		if (l->addrs[i]) {
		l->addrs[i] = track->addrs[i];
		continue;
		} else
		break;

		#endif
		l->sum_time = age;
		l->min_time = age;
		l->max_time = age;
		@@ -6126,10 +6139,19 @@ static int alloc_trace_locations(struct seq_file seq, struct kmem_cache s,

		for (i = 0; i < t.count; i++) {
		struct location *l = &t.loc[i];
		unsigned int j = 0;

		seq_printf(seq,
		"alloc_list: call_site=%pS count=%zu object_size=%zu slab_size=%zu slab_name=%s\n",
		l->addr, l->count, s->object_size, s->size, s->name);
		#ifdef CONFIG_STACKTRACE
		for (j = 0; j < TRACK_ADDRS_COUNT; j++)
		if (l->addrs[j]) {
		seq_printf(seq, "%pS\n", l->addrs[j]);
		continue;
		} else
		break;
		#endif
		}

		free_loc_track(&t);