From: Ingo Molnar <mingo@kernel.org>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Borislav Petkov <bp@alien8.de>,
Steven Rostedt <rostedt@goodmis.org>,
linux-kernel@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Jason Baron <jbaron@akamai.com>
Subject: Re: [PATCH 4/4] x86/jump-label: Show where and what was wrong on errors
Date: Mon, 12 Aug 2013 17:57:20 +0200 [thread overview]
Message-ID: <20130812155720.GA14922@gmail.com> (raw)
In-Reply-To: <5208F1E8.4050902@zytor.com>
* H. Peter Anvin <hpa@zytor.com> wrote:
> 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.
I think those patches are going forward, so we can just regard BUG() as
always existing from a program flow POV.
Thanks,
Ingo
prev parent reply other threads:[~2013-08-12 15:57 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-07 16:49 [PATCH 0/4] [GIT PULL][3.12] x86/jump-label: Clean ups and safety checks Steven Rostedt
2013-08-07 16:49 ` [PATCH 1/4] x86/jump-label: Use best default nops for inital jump label calls Steven Rostedt
2013-08-07 16:49 ` [PATCH 2/4] x86/jump-label: Do not bother updating nops if they are correct Steven Rostedt
2013-08-07 16:49 ` [PATCH 3/4] x86/jump-label: Add safety checks to jump label conversions Steven Rostedt
2013-08-07 16:49 ` [PATCH 4/4] x86/jump-label: Show where and what was wrong on errors Steven Rostedt
2013-08-07 17:20 ` Borislav Petkov
2013-08-07 17:33 ` Steven Rostedt
2013-08-07 17:37 ` Borislav Petkov
2013-08-07 17:46 ` Steven Rostedt
2013-08-07 17:51 ` H. Peter Anvin
2013-08-07 18:41 ` Borislav Petkov
2013-08-07 18:45 ` H. Peter Anvin
2013-08-12 14:31 ` Peter Zijlstra
2013-08-12 14:32 ` H. Peter Anvin
2013-08-12 15:57 ` Ingo Molnar [this message]
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