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From: Ingo Molnar <mingo@elte.hu>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-kernel@vger.kernel.org,
	Andrew Morton <akpm@linux-foundation.org>,
	"H. Peter Anvin" <hpa@zytor.com>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: [PATCH][GIT PULL][v3.3] x86: Test saved %rip in NMI to determine nested NMI
Date: Mon, 20 Feb 2012 16:34:52 +0100	[thread overview]
Message-ID: <20120220153452.GA4962@elte.hu> (raw)
In-Reply-To: <1329748907.25686.29.camel@gandalf.stny.rr.com>


* Steven Rostedt <rostedt@goodmis.org> wrote:

> On Mon, 2012-02-20 at 09:10 +0100, Ingo Molnar wrote:
> > > 
> > > Note, it does not seem to cause any destruction, but screw up 
> > > profiling.
> > 
> > Except if the source of the NMI was not profiling, right?
> 
> Well, what else are NMIs used for? [...]

There's various (legacy) diagnostics NMIs on various x86 
platforms, mostly signalling some sort of deep trouble
with the hw.

Thanks,

	Ingo

  reply	other threads:[~2012-02-20 15:35 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-02-19  2:06 [PATCH][GIT PULL][v3.3] x86: Test saved %rip in NMI to determine nested NMI Steven Rostedt
2012-02-19 12:56 ` Ingo Molnar
2012-02-19 13:46   ` hpanvin@gmail.com
2012-02-19 13:48     ` Ingo Molnar
2012-02-19 20:34     ` Steven Rostedt
2012-02-19 20:45       ` H. Peter Anvin
2012-02-19 21:00         ` Steven Rostedt
2012-02-19 14:57   ` Steven Rostedt
2012-02-20  8:10     ` Ingo Molnar
2012-02-20 14:41       ` Steven Rostedt
2012-02-20 15:34         ` Ingo Molnar [this message]
2012-02-20 17:07           ` H. Peter Anvin
2012-02-19 21:43   ` [PATCH v2][GIT PULL][v3.3] x86: Test saved %cs " Steven Rostedt
2012-02-20 11:47     ` [tip:x86/urgent] x86/nmi: Test saved %cs in NMI to determine nested NMI case tip-bot for Steven Rostedt
2012-02-20 16:51       ` Steven Rostedt
2012-02-27 21:29         ` Greg KH
2012-02-20 18:03       ` Linus Torvalds
2012-02-20 18:26         ` Steven Rostedt
2012-02-21 22:08         ` [tip:x86/urgent] x86: Specify a size for the cmp in the NMI handler tip-bot for Steven Rostedt

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