lib: add memory allocations report in show_mem()

Include allocations in show_mem reports.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Signed-off-by: Suren Baghdasaryan <surenb@google.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/lib/alloc_tag.c b/lib/alloc_tag.c
index 2d5226d9262d..54312c213860 100644
--- a/lib/alloc_tag.c
+++ b/lib/alloc_tag.c
@@ -96,6 +96,44 @@ static const struct seq_operations allocinfo_seq_op = {
 	.show	= allocinfo_show,
 };
 
+void alloc_tags_show_mem_report(struct seq_buf *s)
+{
+	struct codetag_iterator iter;
+	struct codetag *ct;
+	struct {
+		struct codetag		*tag;
+		size_t			bytes;
+	} tags[10], n;
+	unsigned int i, nr = 0;
+
+	codetag_lock_module_list(alloc_tag_cttype, true);
+	iter = codetag_get_ct_iter(alloc_tag_cttype);
+	while ((ct = codetag_next_ct(&iter))) {
+		struct alloc_tag_counters counter = alloc_tag_read(ct_to_alloc_tag(ct));
+
+		n.tag	= ct;
+		n.bytes = counter.bytes;
+
+		for (i = 0; i < nr; i++)
+			if (n.bytes > tags[i].bytes)
+				break;
+
+		if (i < ARRAY_SIZE(tags)) {
+			nr -= nr == ARRAY_SIZE(tags);
+			memmove(&tags[i + 1],
+				&tags[i],
+				sizeof(tags[0]) * (nr - i));
+			nr++;
+			tags[i] = n;
+		}
+	}
+
+	for (i = 0; i < nr; i++)
+		alloc_tag_to_text(s, tags[i].tag);
+
+	codetag_lock_module_list(alloc_tag_cttype, false);
+}
+
 static void __init procfs_init(void)
 {
 	proc_create_seq("allocinfo", 0444, NULL, &allocinfo_seq_op);