From: Prarit Bhargava <prarit@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: len.brown@kernel.org
Subject: Re: [RESEND 2] [PATCH 0/2] Rewrite power limit notification interrupt handling
Date: Wed, 29 May 2013 14:14:09 -0400 [thread overview]
Message-ID: <51A64571.5050804@redhat.com> (raw)
Len,
>The "Power Limit Notification" (X86_FEATURE_PLN) was added in Sandy Bridge
>to give the OS the option of knowing when the package has reached
>a configured power threshold.
>printk(KERN_CRIT "CPU%d: %s power limit notification (total events = %lu)
>printk(KERN_INFO "CPU%d: %s power limit normal\n"
I'm seeing this on a widening number of systems, mostly newer Intel systems.
>However, these events are quite routine on some systems under some conditions,
>alarming customers and provoking un-necessary customer support calls.
The idea that these are "routine" just doesn't make sense to me. Either this
warning is firing for a valid reason or it isn't. If it isn't then the question
remains -- why is it firing? Is it because of buggy FW or is something
actually wrong with the hardware?
P.
next reply other threads:[~2013-05-29 18:14 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-29 18:14 Prarit Bhargava [this message]
-- strict thread matches above, loose matches on Subject: below --
2013-05-16 21:54 [RESEND] [PATCH 0/2] Quiet power limit notification Len Brown
2013-05-21 16:53 ` [RESEND 2] [PATCH 0/2] Rewrite power limit notification interrupt handling Len Brown
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