linux-kernel - Re: [PATCH] printk: add KERN_NOTIME to skip the timestamp

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Message-ID: <CAH2Cfb909YCOtb+iob18QhY7Ze8AP0-5Ofdkr7i+xRVJi-yk1Q@mail.gmail.com>
Date:   Wed, 13 Feb 2019 14:25:20 +0800
From:   xiang xiao <xiaoxiang781216@...il.com>
To:     Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
Cc:     Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        linux-kernel@...r.kernel.org, Xiang Xiao <xiaoxiang@...omi.com>
Subject: Re: [PATCH] printk: add KERN_NOTIME to skip the timestamp

On Wed, Feb 13, 2019 at 8:48 AM Sergey Senozhatsky
<sergey.senozhatsky.work@...il.com> wrote:
>
> On (02/13/19 02:11), Xiang Xiao wrote:
> >
> > Because log may already add the timestamp sometime
> >
>
> We have module_param(printk_time) which enables/disables
> timestamps. And a .config option. And a kernel boot param.
> Why would you want KERN_NOTIME?
>

Because I need control whether append timestamp per message:
1.message come from kernel add the timestamp
2.message come from remote skip the timestamp
Like my previous reply case.

>         -ss