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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 AE44DC4332B for ; Tue, 24 Mar 2020 07:34:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 756CF20735 for ; Tue, 24 Mar 2020 07:34:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585035293; bh=3p7k+XNYmJjEY9kaw0/x9dsFk6M+aGq/xpxVRBNIW6g=; h=From:To:Cc:Subject:Date:List-ID:From; b=nQtw2RwOfpPsh0H6uFMR9ov4VExc1jHLX11ZBm+48llTFcJrPCnU0An88lDBJGk2B SdOFpybJ6BhvB9YPfA5+fzPiuirq32NOTDZ+vukFDlVAPkW3C4QYGiqKmgxSkAxYvz MRNF76KS0ANUp3coaUFeZsT8jNoBYxpoGrTQxEPs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1725923AbgCXHex (ORCPT ); Tue, 24 Mar 2020 03:34:53 -0400 Received: from mail.kernel.org ([198.145.29.99]:55130 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725869AbgCXHex (ORCPT ); Tue, 24 Mar 2020 03:34:53 -0400 Received: from localhost.localdomain (NE2965lan1.rev.em-net.ne.jp [210.141.244.193]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 643CF20719; Tue, 24 Mar 2020 07:34:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1585035292; bh=3p7k+XNYmJjEY9kaw0/x9dsFk6M+aGq/xpxVRBNIW6g=; h=From:To:Cc:Subject:Date:From; b=WLx84AyFiLEd8mViP9DzGOGsOyXycwW2BzJapP8bMB0CzgHxOyaJm0o4eUsEx6RVt 1wfXJqb7JRlB6OhWt9RAFGQlQ3hExGRbkQjLXviuYiIY1+zHAfuMF2ZggrKKFxs+Fk IVKKV9j6Une21dUYoU0G2tjADbY0KwCSq+w03OlM= From: Masami Hiramatsu To: Steven Rostedt Cc: Masami Hiramatsu , linux-kernel@vger.kernel.org, Taeung Song , linux-trace-users@vger.kernel.org, "David S . Miller" , Alban Crequy Subject: [PATCH] ftrace/kprobe: Show the maxactive number on kprobe_events Date: Tue, 24 Mar 2020 16:34:48 +0900 Message-Id: <158503528846.22706.5549974121212526020.stgit@devnote2> X-Mailer: git-send-email 2.20.1 User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Sender: linux-trace-users-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-trace-users@vger.kernel.org Show maxactive parameter on kprobe_events. This allows user to save the current configuration and restore it without losing maxactive parameter. Reported-by: Taeung Song Signed-off-by: Masami Hiramatsu --- kernel/trace/trace_kprobe.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c index 362cca52f5de..d0568af4a0ef 100644 --- a/kernel/trace/trace_kprobe.c +++ b/kernel/trace/trace_kprobe.c @@ -1078,6 +1078,8 @@ static int trace_kprobe_show(struct seq_file *m, struct dyn_event *ev) int i; seq_putc(m, trace_kprobe_is_return(tk) ? 'r' : 'p'); + if (trace_kprobe_is_return(tk) && tk->rp.maxactive) + seq_printf(m, "%d", tk->rp.maxactive); seq_printf(m, ":%s/%s", trace_probe_group_name(&tk->tp), trace_probe_name(&tk->tp));