From: Len Brown <lenb@kernel.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Andrew Morton <akpm@linux-foundation.org>,
x86@kernel.org, linux-kernel@vger.kernel.org,
"H. Peter Anvin" <hpa@zytor.com>,
linux-pm@lists.linux-foundation.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Arjan van de Ven <arjan@infradead.org>
Subject: Re: [PATCH] x86 intel power: Initialize MSR_IA32_ENERGY_PERF_BIAS
Date: Wed, 13 Jul 2011 16:44:26 -0400 (EDT) [thread overview]
Message-ID: <alpine.LFD.2.02.1107131640280.9546@x980> (raw)
In-Reply-To: <20110415101712.GB28007@elte.hu>
> So how about informing users, how about making it non-silent? An informative
> printk that also mentions the power configuration tool, etc. This solves the
> concerns i mentioned.
Something like this?
rdmsrl(MSR_IA32_ENERGY_PERF_BIAS, epb);
if ((epb & 0xF) == 0) {
printk_once(KERN_WARN, "x86: updated energy_perf_bias"
" to 'normal' from 'performance'\n"
"You can view and update epb via utility,"
" such as x86_energy_perf_policy(8)\n");
epb = (epb & ~0xF) | ENERGY_PERF_BIAS_NORMAL;
wrmsrl(MSR_IA32_ENERGY_PERF_BIAS, epb);
}
next prev parent reply other threads:[~2011-07-13 20:44 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <alpine.LFD.2.02.1103301819250.31342@x980>
2011-04-14 9:08 ` [PATCH] x86 intel power: Initialize MSR_IA32_ENERGY_PERF_BIAS Ingo Molnar
[not found] ` <20110414090854.GB9248@elte.hu>
2011-04-15 6:25 ` Len Brown
[not found] ` <alpine.LFD.2.02.1104150202310.29365@x980>
2011-04-15 10:17 ` Ingo Molnar
2011-04-20 13:14 ` Pavel Machek
[not found] ` <20110415101712.GB28007@elte.hu>
2011-07-13 20:44 ` Len Brown [this message]
2011-07-13 20:49 ` Linus Torvalds
2011-07-13 21:38 ` H. Peter Anvin
[not found] ` <4E1E106E.4060408@zytor.com>
2011-07-14 4:53 ` [PATCH v2] " Len Brown
[not found] ` <alpine.LFD.2.02.1107140051020.18606@x980>
2011-07-14 19:35 ` Rafael J. Wysocki
2011-07-15 21:37 ` [PATCH v3] " Len Brown
[not found] ` <20110420131442.GA29418@atrey.karlin.mff.cuni.cz>
2011-07-13 20:51 ` [PATCH] " Len Brown
2011-03-30 22:21 Len Brown
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