From: Guillaume Chazarain <guichaz@yahoo.fr>
To: Denis Sadykov <denis.m.sadykov@intel.com>,
Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>,
cpufreq@lists.linux.org.uk
Subject: [PATCH] Fix /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq with acpi-cpufreq and ondemand
Date: Tue, 02 Jan 2007 16:41:51 +0100 [thread overview]
Message-ID: <459A7D3F.60309@yahoo.fr> (raw)
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Hi,
This is 2.6.20 material I think.
--
Guillaume
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As of linux-2.6.20-rc2 using acpi-cpufreq and ondemand on my Pentium M
(Asus V6VA laptop) seems broken.
/sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq contains most of
the time 1, sometimes the actual frequency or (rarely) some random value.
The problem seems to come from
http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=7650b281b091f39f5e97f13b45ab3813b1526b65
The attached patch fixes the problem for me.
Signed-off-by: Guillaume Chazarain <guichaz@yahoo.fr>
---
diff -r 5b8ceb2c0e06 arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c
--- a/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c Mon Jan 01 13:10:08 2007 +0100
+++ b/arch/i386/kernel/cpu/cpufreq/acpi-cpufreq.c Mon Jan 01 16:23:04 2007 +0100
@@ -440,7 +440,7 @@ static int acpi_cpufreq_target(struct cp
cpu_set(policy->cpu, cmd.mask);
freqs.old = data->freq_table[perf->state].frequency;
- freqs.new = data->freq_table[next_perf_state].frequency;
+ freqs.new = data->freq_table[next_state].frequency;
for_each_cpu_mask(i, cmd.mask) {
freqs.cpu = i;
cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE);
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next reply other threads:[~2007-01-02 15:41 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-01-02 15:41 Guillaume Chazarain [this message]
2007-01-02 17:46 ` [PATCH] Fix /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq with acpi-cpufreq and ondemand Pallipadi, Venkatesh
2007-01-02 18:58 ` Guillaume Chazarain
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