diff options
| author | Keir Fraser <keir.fraser@citrix.com> | 2008-09-22 15:24:03 +0100 |
|---|---|---|
| committer | Keir Fraser <keir.fraser@citrix.com> | 2008-09-22 15:24:03 +0100 |
| commit | 755af07edba1768cefdc33851b70fc21bc17e0f6 (patch) | |
| tree | 93726c2d9f64fac39d5f28895ef9a4bf0d2e5c0b /xen/arch/x86/acpi/cpufreq/cpufreq.c | |
| parent | 23f36ed6ff84de351caab8903b9909ec22e5d294 (diff) | |
x86/cpufreq: don't use static array for large per-CPU data structures
... as this is rather wasteful when Xen is configured to support many
CPUs but is running on systems having only a few.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Diffstat (limited to 'xen/arch/x86/acpi/cpufreq/cpufreq.c')
| -rw-r--r-- | xen/arch/x86/acpi/cpufreq/cpufreq.c | 23 |
1 files changed, 13 insertions, 10 deletions
diff --git a/xen/arch/x86/acpi/cpufreq/cpufreq.c b/xen/arch/x86/acpi/cpufreq/cpufreq.c index a304f352bc..119d8ff86d 100644 --- a/xen/arch/x86/acpi/cpufreq/cpufreq.c +++ b/xen/arch/x86/acpi/cpufreq/cpufreq.c @@ -389,12 +389,15 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy, static int acpi_cpufreq_verify(struct cpufreq_policy *policy) { - struct acpi_cpufreq_data *data = drv_data[policy->cpu]; - struct processor_performance *perf = &processor_pminfo[policy->cpu].perf; + struct acpi_cpufreq_data *data; + struct processor_performance *perf; - if (!policy || !data) + if (!policy || !(data = drv_data[policy->cpu]) || + !processor_pminfo[policy->cpu]) return -EINVAL; + perf = &processor_pminfo[policy->cpu]->perf; + cpufreq_verify_within_limits(policy, 0, perf->states[perf->platform_limit].core_frequency * 1000); @@ -447,7 +450,7 @@ acpi_cpufreq_cpu_init(struct cpufreq_policy *policy) drv_data[cpu] = data; - data->acpi_data = &processor_pminfo[cpu].perf; + data->acpi_data = &processor_pminfo[cpu]->perf; perf = data->acpi_data; policy->shared_type = perf->shared_type; @@ -580,11 +583,11 @@ static struct cpufreq_driver acpi_cpufreq_driver = { int cpufreq_limit_change(unsigned int cpu) { - struct processor_performance *perf = &processor_pminfo[cpu].perf; + struct processor_performance *perf = &processor_pminfo[cpu]->perf; struct cpufreq_policy *data = cpufreq_cpu_policy[cpu]; struct cpufreq_policy policy; - if (!cpu_online(cpu) || !data) + if (!cpu_online(cpu) || !data || !processor_pminfo[cpu]) return -ENODEV; if ((perf->platform_limit < 0) || @@ -607,10 +610,10 @@ int cpufreq_add_cpu(unsigned int cpu) unsigned int j; struct cpufreq_policy new_policy; struct cpufreq_policy *policy; - struct processor_performance *perf = &processor_pminfo[cpu].perf; + struct processor_performance *perf = &processor_pminfo[cpu]->perf; /* to protect the case when Px was not controlled by xen */ - if (!(perf->init & XEN_PX_INIT)) + if (!processor_pminfo[cpu] || !(perf->init & XEN_PX_INIT)) return 0; if (cpu_is_offline(cpu) || cpufreq_cpu_policy[cpu]) @@ -683,10 +686,10 @@ int cpufreq_del_cpu(unsigned int cpu) { unsigned int dom; struct cpufreq_policy *policy; - struct processor_performance *perf = &processor_pminfo[cpu].perf; + struct processor_performance *perf = &processor_pminfo[cpu]->perf; /* to protect the case when Px was not controlled by xen */ - if (!(perf->init & XEN_PX_INIT)) + if (!processor_pminfo[cpu] || !(perf->init & XEN_PX_INIT)) return 0; if (cpu_is_offline(cpu) || !cpufreq_cpu_policy[cpu]) |