From: Linus Torvalds <torvalds@linux-foundation.org>
To: Len Brown <lenb@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>,
x86@kernel.org, linux-pm@lists.linux-foundation.org,
linux-kernel@vger.kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Thomas Gleixner <tglx@linutronix.de>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Andrew Morton <akpm@linux-foundation.org>,
Arjan van de Ven <arjan@infradead.org>
Subject: Re: [PATCH] x86 intel power: Initialize MSR_IA32_ENERGY_PERF_BIAS
Date: Wed, 13 Jul 2011 13:49:06 -0700 [thread overview]
Message-ID: <CA+55aFxBkgwBbnqwO7DuizsWiVcULYtPzqr-mYrT6aHmXV0zZw@mail.gmail.com> (raw)
In-Reply-To: <alpine.LFD.2.02.1107131640280.9546@x980>
Ack. Let's just do this. Ingo?
Linus
On Wed, Jul 13, 2011 at 1:44 PM, Len Brown <lenb@kernel.org> wrote:
>
>> 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);
> }
>
>
WARNING: multiple messages have this Message-ID (diff)
From: Linus Torvalds <torvalds@linux-foundation.org>
To: Len Brown <lenb@kernel.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
x86@kernel.org, linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>,
"H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@elte.hu>,
linux-pm@lists.linux-foundation.org,
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 13:49:06 -0700 [thread overview]
Message-ID: <CA+55aFxBkgwBbnqwO7DuizsWiVcULYtPzqr-mYrT6aHmXV0zZw@mail.gmail.com> (raw)
In-Reply-To: <alpine.LFD.2.02.1107131640280.9546@x980>
Ack. Let's just do this. Ingo?
Linus
On Wed, Jul 13, 2011 at 1:44 PM, Len Brown <lenb@kernel.org> wrote:
>
>> 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 20:57 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-30 22:21 [PATCH] x86 intel power: Initialize MSR_IA32_ENERGY_PERF_BIAS Len Brown
2011-04-14 9:08 ` Ingo Molnar
2011-04-15 6:25 ` Len Brown
2011-04-15 10:17 ` Ingo Molnar
2011-07-13 20:44 ` Len Brown
2011-07-13 20:44 ` Len Brown
2011-07-13 20:49 ` Linus Torvalds [this message]
2011-07-13 20:49 ` Linus Torvalds
2011-07-13 21:38 ` H. Peter Anvin
2011-07-13 21:38 ` H. Peter Anvin
2011-07-14 4:53 ` [PATCH v2] " Len Brown
2011-07-14 19:35 ` Rafael J. Wysocki
2011-07-14 19:35 ` Rafael J. Wysocki
2011-07-14 21:12 ` [tip:x86/cpu] x86, intel, " tip-bot for Len Brown
2011-07-15 0:18 ` [tip:x86/cpu] x86, msr: Fix typo in ENERGY_PERF_BIAS_POWERSAVE tip-bot for H. Peter Anvin
2011-07-15 21:37 ` [PATCH v3] x86 intel power: Initialize MSR_IA32_ENERGY_PERF_BIAS Len Brown
2011-07-15 21:37 ` Len Brown
2011-07-16 18:52 ` [tip:x86/cpu] x86, intel, power: Correct the MSR_IA32_ENERGY_PERF_BIAS message tip-bot for Len Brown
2011-08-18 17:23 ` Christoph Fritz
2011-07-14 4:53 ` [PATCH v2] x86 intel power: Initialize MSR_IA32_ENERGY_PERF_BIAS Len Brown
2011-04-15 10:17 ` [PATCH] " Ingo Molnar
2011-04-20 13:14 ` Pavel Machek
2011-07-13 20:51 ` Len Brown
2011-07-13 20:51 ` Len Brown
2011-04-20 13:14 ` Pavel Machek
2011-04-15 6:25 ` Len Brown
2011-04-14 9:08 ` Ingo Molnar
-- strict thread matches above, loose matches on Subject: below --
2011-03-30 22:21 Len Brown
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