From: "H. Peter Anvin" <hpa@zytor.com>
To: Corey Minyard <minyard@acm.org>
Cc: paulmck@linux.vnet.ibm.com, linux-kernel@vger.kernel.org,
tglx@linutronix.de, mingo@redhat.com, dvhltc@us.ibm.com,
niv@us.ibm.com
Subject: Re: Recoverable MCA interrupts from NMI handlers? IPMI and RCU?
Date: Fri, 06 Jun 2008 17:03:37 -0700 [thread overview]
Message-ID: <4849D059.1000701@zytor.com> (raw)
In-Reply-To: <4849A3AC.5090107@acm.org>
Corey Minyard wrote:
> If you mean the IPMI driver, it does not tie into any SMI. It
> theoretically could since there's a bit for that in the watchdog timer,
> but there's been no demand and I haven't looked at it. I guess it would
> be better than an NMI.
>
> If it did tie in, it would most likely just panic to get useful
> information out before the watchdog reset the system.
The main reason I could see wanting to use SMI would be as a debugging
tool, since SMI makes the entire state of the system available at a low
level; however, trying to interact with the state of the kernel at this
priority level seems beyond the pale in terms of complexity.
-hpa
next prev parent reply other threads:[~2008-06-07 0:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-06-06 15:21 Recoverable MCA interrupts from NMI handlers? IPMI and RCU? Paul E. McKenney
2008-06-06 16:12 ` H. Peter Anvin
2008-06-06 16:41 ` Paul E. McKenney
2008-06-06 17:04 ` Maciej W. Rozycki
2008-06-06 20:53 ` Corey Minyard
2008-06-06 21:33 ` Paul E. McKenney
2008-06-07 0:03 ` H. Peter Anvin [this message]
2008-06-07 0:44 ` Paul E. McKenney
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