linux-kernel - Re: a question about how to debug this case in ftrace

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Date: Wed, 26 Jun 2024 16:26:05 +0800
From: Song Chen <chensong_2000@....cn>
To: John Ogness <john.ogness@...utronix.de>,
 Andrew Halaney <ahalaney@...hat.com>
Cc: Derek Barbosa <debarbos@...hat.com>, pmladek@...e.com,
 rostedt@...dmis.org, senozhatsky@...omium.org,
 linux-rt-users@...r.kernel.org, linux-kernel@...r.kernel.org,
 williams@...hat.com, jlelli@...hat.com
Subject: Re: a question about how to debug this case in ftrace

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.

Song

在 2024/6/26 15:25, John Ogness 写道:
> On 2024-06-26, Song Chen <chensong_2000@....cn> wrote:
>> ohh, by the way, i'm curious why softlockup/hardlockup/hungtask don't
>> have ftrace dump as well as rcu stall, or is it possible to add a
>> parameter in cmdline to redirect
>> softlockup/hardlockup/hungtask/rcustall warning either to ftrace or
>> printk.
> 
> Are you aware of the printk:console ftrace event? If you enable it, all
> printk output also goes into the ftrace buffers.
> 
> John Ogness
> 
>