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authorDarrick J. Wong <djwong@us.ibm.com>2008-04-18 16:31:12 -0400
committerDave Jones <davej@redhat.com>2008-04-28 16:27:08 -0400
commite8628dd06d66f2e3965ec9742029b401d63434f1 (patch)
tree341d5a2e36c877bd52c5567aa5791557a6920557 /include/linux/cpufreq.h
parente56a727b023d40d1adf660168883f30f2e6abe0a (diff)
[CPUFREQ] expose cpufreq coordination requirements regardless of coordination mechanism
Currently, affected_cpus shows which CPUs need to have their frequency coordinated in software. When hardware coordination is in use, the contents of this file appear the same as when no coordination is required. This can lead to some confusion among user-space programs, for example, that do not know that extra coordination is required to force a CPU core to a particular speed to control power consumption. To fix this, create a "related_cpus" attribute that always displays the coordination map regardless of whatever coordination strategy the cpufreq driver uses (sw or hw). If the cpufreq driver does not provide a value, fall back to policy->cpus. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dave Jones <davej@redhat.com>
Diffstat (limited to 'include/linux/cpufreq.h')
-rw-r--r--include/linux/cpufreq.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index ddd8652fc3f3..a881fd62c447 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -83,7 +83,8 @@ struct cpufreq_real_policy {
83}; 83};
84 84
85struct cpufreq_policy { 85struct cpufreq_policy {
86 cpumask_t cpus; /* affected CPUs */ 86 cpumask_t cpus; /* CPUs requiring sw coordination */
87 cpumask_t related_cpus; /* CPUs with any coordination */
87 unsigned int shared_type; /* ANY or ALL affected CPUs 88 unsigned int shared_type; /* ANY or ALL affected CPUs
88 should set cpufreq */ 89 should set cpufreq */
89 unsigned int cpu; /* cpu nr of registered CPU */ 90 unsigned int cpu; /* cpu nr of registered CPU */