linux-kernel - Re: [PATCH] x86: sysctl to allow panic on IOCK NMI error

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Message-ID: <20090625201835.GA10263@elte.hu>
Date:	Thu, 25 Jun 2009 22:18:35 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Greg KH <gregkh@...e.de>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>, x86@...nel.org,
	"H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Kurt Garloff <garloff@...e.de>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] x86: sysctl to allow panic on IOCK NMI error


* Greg KH <gregkh@...e.de> wrote:

> On Thu, Jun 25, 2009 at 11:15:45AM -0700, Eric W. Biederman wrote:
> > Greg KH <gregkh@...e.de> writes:
> > 
> > > From: Kurt Garloff <garloff@...e.de>
> > >
> > > This patch introduces a sysctl /proc/sys/kernel/panic_on_io_nmi, which
> > > defaults to 0 (off).
> > >
> > > When enabled, the kernel panics when the kernel receives an NMI caused
> > > by an IO error.
> > >
> > > The IO error triggered NMI indicates a serious system condition, which
> > > could result in IO data corruption. Rather than contiuing, panicing and
> > > dumping might be a better choice, so one can figure out what's causing
> > > the IO error.
> > >
> > > This could be especially important to companies running IO intensive
> > > applications where corruption must be avoided, e.g. a banks databases.
> > 
> > Nacked-by: "Eric W. Biederman" <ebiederm@...ssion.com>
> > 
> > New binary sysctls are not allowed.   Please remove the
> > sysctl.h and .ctl_name portions.
> > 
> > see:
> > Documentation/sysctl/ctl_unnumbered.txt
> > Documentation/feature-remove-schedule.txt
> > 
> > I have a set of patches that should make this kind of thing
> > fail to compile for .32.  Hopefully I can get that out in 
> > the next couple of days.  Making problems like this easier
> > to spot and deal with.
> 
> Oops, ok, will do, sorry about that.  Let me go create a new 
> patch.
> 
> Ingo, do you want an incremental one, or a replacement for the 
> original?

Neither - already fixed :)

	Ingo
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