linux-kernel - Re: [PATCH 4/4] x86/jump-label: Show where and what was wrong on errors

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Message-ID: <5208F1E8.4050902@zytor.com>
Date:	Mon, 12 Aug 2013 07:32:08 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	Borislav Petkov <bp@...en8.de>,
	Steven Rostedt <rostedt@...dmis.org>,
	linux-kernel@...r.kernel.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Ingo Molnar <mingo@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jason Baron <jbaron@...mai.com>
Subject: Re: [PATCH 4/4] x86/jump-label: Show where and what was wrong on
 errors

On 08/12/2013 07:31 AM, Peter Zijlstra wrote:
> On Wed, Aug 07, 2013 at 07:20:44PM +0200, Borislav Petkov wrote:
>> Besides, BUG can be disabled in CONFIG_EXPERT.
> 
> There was some email on this subject a while ago; disabling BUG() is
> very risky and can cause all kinds of horrid. IIRC the consensus back
> then was to remove this 'feature' and have BUG always at least lock up
> the machine hard.
> 

Yes, always trap but leave the metadata as optional.

	-hpa

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