linux-kernel - Re: [PATCH v3] printk: add option to print cpu id

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Message-ID: <m2628z6euk.fsf@firstfloor.org>
Date:	Fri, 03 Aug 2012 10:54:27 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	Vikram Pandita <vikram.pandita@...com>
Cc:	<gregkh@...uxfoundation.org>, <kay@...y.org>,
	<linux-kernel@...r.kernel.org>, <linux-omap@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	Mike Turquette <mturquette@...aro.org>,
	Vimarsh Zutshi <vimarsh.zutshi@...il.com>
Subject: Re: [PATCH v3] printk: add option to print cpu id

Vikram Pandita <vikram.pandita@...com> writes:

> From: Vikram Pandita <vikram.pandita@...com>
>
> Introduce config option to enable CPU id reporting for printk() calls.

What's wrong with using trace_printk for this? That's much faster
anyways. Generally printk is so slow that it's typically useless for
instrumenting races.

And really: Wasting 1/3 of the 80 character line is too much.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only
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