From: Don Zickus <dzickus@redhat.com>
To: Nicos Gollan <ngollan@spearhead.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Mysterious freezes after 2.6.35, no NMI
Date: Tue, 19 Apr 2011 10:30:31 -0400 [thread overview]
Message-ID: <20110419143031.GA21993@redhat.com> (raw)
In-Reply-To: <201104121939.59910.ngollan@spearhead.de>
On Tue, Apr 12, 2011 at 07:39:59PM +0200, Nicos Gollan wrote:
> To add insult to injury, at least in the 2.6.38 series, the NMI watchdog is
> broken. The counters in /proc/interrupts always show 0, but will count up
> quite happily on 2.6.35.
The nmi watchdog changed for 2.6.36, such that it increments every 60
seconds instead of every second. Using cpuspeed and a lightly loaded
system, will delay it even longer. This is a good thing as you don't need
nmi interrupts firing all the time.
But if after sticking a load on the system for 10 minutes, the NMI
interrupt doesn't increment, then I would be concerned.
Cheers,
Don
next prev parent reply other threads:[~2011-04-19 19:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-12 17:39 Mysterious freezes after 2.6.35, no NMI Nicos Gollan
2011-04-19 14:30 ` Don Zickus [this message]
2011-04-19 19:52 ` Nicos Gollan
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