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Sun, 13 Sep 2026 22:34:52 -0700 (PDT) From: Donggeun Yoo To: Steven Rostedt , Masami Hiramatsu Cc: Mathieu Desnoyers , Tom Zanussi , linux-trace-kernel@vger.kernel.org, linux-kernel@vger.kernel.org, Donggeun Yoo Subject: [PATCH v3 1/4] tracing: Print the bucket size as unsigned Date: Mon, 14 Sep 2026 14:34:40 +0900 Message-ID: <20260914053443.981201-2-donggeunyoo.kernel@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260914053443.981201-1-donggeunyoo.kernel@gmail.com> References: <20260914053443.981201-1-donggeunyoo.kernel@gmail.com> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit A key's bucket size reads back negative once it exceeds LONG_MAX: # echo 'hist:keys=next_pid.buckets=18446744073709551615' > trigger # cat trigger hist:keys=next_pid.buckets=-1:vals=hitcount:... parse_field() takes the size with kstrtoul() and rejects only zero, so the whole unsigned long range is accepted and stored, but hist_field_print() renders it with %ld. Print it with %lu. Fixes: de9a48a360b7 ("tracing: Add linear buckets to histogram logic") Signed-off-by: Donggeun Yoo Assisted-by: Claude:claude-fable-5 --- kernel/trace/trace_events_hist.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c index 8af97fd4ee2d..a3eae5c1344a 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -6200,7 +6200,7 @@ static void hist_field_print(struct seq_file *m, struct hist_field *hist_field) } } if (hist_field->buckets) - seq_printf(m, "=%ld", hist_field->buckets); + seq_printf(m, "=%lu", hist_field->buckets); } static int event_hist_trigger_print(struct seq_file *m, -- 2.53.0