linux-kernel - MCE/Hardware errors/Temperature on MacBookAir 4,2

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Message-ID: <20111206082953.GA1945@schottelius.org>
Date:	Tue, 6 Dec 2011 09:29:53 +0100
From:	Nico Schottelius <nico-linux-20111201@...ottelius.org>
To:	LKML <linux-kernel@...r.kernel.org>
Cc:	Nico Schottelius <nico-linux-20111201@...ottelius.org>
Subject: MCE/Hardware errors/Temperature on MacBookAir 4,2

Hello,

with the previous kernel compiling a new kernel, I get these
messages in dmesg:

[170745.226310] ieee80211 phy0: brcms_ops_bss_info_changed: arp filtering: enabled true, count 1 (implement)
[170942.965765] CPU3: Core temperature above threshold, cpu clock throttled (total events = 1)
[170942.965770] CPU1: Core temperature above threshold, cpu clock throttled (total events = 1)
[170942.965776] CPU2: Package temperature above threshold, cpu clock throttled (total events = 1)
[170942.965781] CPU0: Package temperature above threshold, cpu clock throttled (total events = 1)
[170942.965785] CPU1: Package temperature above threshold, cpu clock throttled (total events = 1)
[170942.965791] CPU3: Package temperature above threshold, cpu clock throttled (total events = 1)
[170942.966766] CPU3: Core temperature/speed normal
[170942.966770] CPU1: Core temperature/speed normal
[170942.966775] CPU2: Package temperature/speed normal
[170942.966779] CPU0: Package temperature/speed normal
[170942.966782] CPU1: Package temperature/speed normal
[170942.966787] CPU3: Package temperature/speed normal
[171033.962774] [Hardware Error]: Machine check events logged

Shall I consider these informative/warning/dangerous?

In any case, I'm wondering whath the hardware error may be
and whether it's really a hardware error or OS problem?

Cheers,

Nico

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