linux-kernel - [PATCH] mm/code_tag: Skip displaying the code

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Message-ID: <20241211085616.2471901-1-quic_zhenhuah@quicinc.com>
Date: Wed, 11 Dec 2024 16:56:16 +0800
From: Zhenhua Huang <quic_zhenhuah@...cinc.com>
To: <akpm@...ux-foundation.org>, <surenb@...gle.com>,
        <kent.overstreet@...ux.dev>
CC: <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>,
        Zhenhua Huang
	<quic_zhenhuah@...cinc.com>
Subject: [PATCH] mm/code_tag: Skip displaying the code_tag if it is not called

/proc/allocinfo is full of callsites which are not called at all.
Let's only output if the callsite actually been invoked.

Signed-off-by: Zhenhua Huang <quic_zhenhuah@...cinc.com>
---
 lib/alloc_tag.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/lib/alloc_tag.c b/lib/alloc_tag.c
index 35f7560a309a..06fb7eb5c0bc 100644
--- a/lib/alloc_tag.c
+++ b/lib/alloc_tag.c
@@ -95,10 +95,12 @@ static void alloc_tag_to_text(struct seq_buf *out, struct codetag *ct)
 	struct alloc_tag_counters counter = alloc_tag_read(tag);
 	s64 bytes = counter.bytes;
 
-	seq_buf_printf(out, "%12lli %8llu ", bytes, counter.calls);
-	codetag_to_text(out, ct);
-	seq_buf_putc(out, ' ');
-	seq_buf_putc(out, '\n');
+	if (bytes || counter.calls) {
+		seq_buf_printf(out, "%12lli %8llu ", bytes, counter.calls);
+		codetag_to_text(out, ct);
+		seq_buf_putc(out, ' ');
+		seq_buf_putc(out, '\n');
+	}
 }
 
 static int allocinfo_show(struct seq_file *m, void *arg)
-- 
2.25.1