From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9A502C432BE for ; Tue, 31 Aug 2021 04:45:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 783A961029 for ; Tue, 31 Aug 2021 04:45:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233418AbhHaEqB (ORCPT ); Tue, 31 Aug 2021 00:46:01 -0400 Received: from smtp.gentoo.org ([140.211.166.183]:34036 "EHLO smtp.gentoo.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229681AbhHaEqA (ORCPT ); Tue, 31 Aug 2021 00:46:00 -0400 Received: from grubbs.orbis-terrarum.net (localhost [127.0.0.1]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by smtp.gentoo.org (Postfix) with ESMTPS id 494D2340B29 for ; Tue, 31 Aug 2021 04:37:29 +0000 (UTC) Received: (qmail 6996 invoked by uid 129); 31 Aug 2021 04:37:28 -0000 X-HELO: thorne.orbis-terrarum.net Authentication-Results: orbis-terrarum.net; auth=pass (cram-md5) smtp.auth=robbat2-thorne@orbis-terrarum.net; iprev=pass Received: from d108-172-209-11.bchsia.telus.net (HELO thorne.orbis-terrarum.net) (108.172.209.11) by orbis-terrarum.net (qpsmtpd/0.95) with ESMTPSA (TLS_AES_256_GCM_SHA384 encrypted); Tue, 31 Aug 2021 04:37:28 +0000 Received: by thorne.orbis-terrarum.net (Postfix, from userid 0) id 18B681982AD; Tue, 31 Aug 2021 04:37:26 +0000 (UTC) From: "Robin H. Johnson" To: linux-kernel@vger.kernel.org Cc: rostedt@goodmis.org, mingo@redhat.com, rjohnson@digitalocean.com, "Robin H. Johnson" Subject: [PATCH 1/2] tracing: show size of requested buffer Date: Mon, 30 Aug 2021 21:37:22 -0700 Message-Id: <20210831043723.13481-1-robbat2@gentoo.org> X-Mailer: git-send-email 2.33.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Virus-Checked: Checked by ClamAV on orbis-terrarum.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org If the perf buffer isn't large enough, provide a hint about how large it needs to be for whatever is running. Signed-off-by: Robin H. Johnson --- kernel/trace/trace_event_perf.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/trace/trace_event_perf.c b/kernel/trace/trace_event_perf.c index 03be4435d103..26eed4b89100 100644 --- a/kernel/trace/trace_event_perf.c +++ b/kernel/trace/trace_event_perf.c @@ -400,7 +400,8 @@ void *perf_trace_buf_alloc(int size, struct pt_regs **regs, int *rctxp) BUILD_BUG_ON(PERF_MAX_TRACE_SIZE % sizeof(unsigned long)); if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE, - "perf buffer not large enough")) + "perf buffer not large enough, wanted %d, have %d", + size, PERF_MAX_TRACE_SIZE)) return NULL; *rctxp = rctx = perf_swevent_get_recursion_context(); -- 2.33.0