linux-kernel - Re: [PATCH 0/2] printk, Add a printk.clock kernel parameter

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Message-ID: <1452100190.24575.35.camel@perches.com>
Date:	Wed, 06 Jan 2016 09:09:50 -0800
From:	Joe Perches <joe@...ches.com>
To:	Prarit Bhargava <prarit@...hat.com>, linux-kernel@...r.kernel.org
Cc:	John Stultz <john.stultz@...aro.org>,
	Xunlei Pang <pang.xunlei@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Baolin Wang <baolin.wang@...aro.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Petr Mladek <pmladek@...e.cz>, Tejun Heo <tj@...nel.org>,
	Peter Hurley <peter@...leysoftware.com>,
	Vasily Averin <vvs@...tuozzo.com>
Subject: Re: [PATCH 0/2] printk, Add a printk.clock kernel parameter

On Wed, 2016-01-06 at 08:00 -0500, Prarit Bhargava wrote:
> Over the past years I've seen many reports of bugs that include
> time-stamped kernel logs (enabled when CONFIG_PRINTK_TIME=y or
> print.time=1 is specified as a kernel parameter) that do not align
> with either external time stamped logs or /var/log/messages.
[]
> This patch introduces printk.clock=[local|boot|real|tai] allowing a
> user to specify an adjusted clock to use with printk timestamps.  The
> hardware clock, or the existing functionality, is preserved by default.

printk.c is already way too large.

Perhaps it would be reasonable to create a new
kernel/printk/timestamp.c file with these changes.

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