From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3466A8F5C; Wed, 26 Jun 2024 14:50:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719413450; cv=none; b=TaVajqeUsi0QWA74EuUTY005iRCEQjeOvfmlYX14zmUecnbz3/2ugA4IqfZLUrEvMSdS/ZNENixeScOCj5YQKWRSIZlvHntxbXMdg84fSGv/uPlEE2nSCjc87Aox536spIm+Pe8jYi1aGjEY2wDVyVx3fBTQRjiNy2dxbaqPUSI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719413450; c=relaxed/simple; bh=ADCRnSIW8Y2Q8+ZZVRqQZbbkuphzK59nx6Z6uoam+ng=; h=Date:From:To:Cc:Subject:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=oh+LE+vhV/QpdoZzYsbF1KyYZme03rZEbOY54ViL5qeB+jnjF/hPou342FeQzTu4D/pdh4z6eXlkJafkIAnMWPzuWUXbNghwL4LJW2oanAAZV3F504QqGIwlSDzGMOMQzn/1jn5SSg/zkq/psQ+x8H8/uR5RU1SiiJK6RSedYro= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 85CB0C116B1; Wed, 26 Jun 2024 14:50:48 +0000 (UTC) Date: Wed, 26 Jun 2024 10:50:46 -0400 From: Steven Rostedt To: Song Chen Cc: John Ogness , Andrew Halaney , Derek Barbosa , pmladek@suse.com, senozhatsky@chromium.org, linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org, williams@redhat.com, jlelli@redhat.com Subject: Re: a question about how to debug this case in ftrace Message-ID: <20240626105046.7ad9299e@rorschach.local.home> In-Reply-To: <7252f93a-ef60-49f8-ae93-73d269cc62f8@189.cn> References: <6802e81c-1926-4195-812a-1a5fe13bcdde@189.cn> <4d198032-d4e1-4a84-8f56-1b31157e9323@189.cn> <8734p0jhdc.fsf@jogness.linutronix.de> <7252f93a-ef60-49f8-ae93-73d269cc62f8@189.cn> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit On Wed, 26 Jun 2024 16:26:05 +0800 Song Chen wrote: > not really, sounds like it meets my expectation of merging logs either > way, "printk:console ftrace event" in cmdline? I searched it in code or > google, no luck. Try adding: trace_event=console -- Steve