Attachment 175114 Details for Bug 299891

[patch] Do not use ondemand per default on opterons

cpufreq_blacklist_opterons_ondemand.patch (text/plain), 1.43 KB, created by Thomas Renninger on 2007-09-27 11:11:47 UTC

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Creator: Thomas Renninger

Created: 2007-09-27 11:11:47 UTC

Size: 1.43 KB

patch

obsolete

>---
> drivers/cpufreq/cpufreq.c |   14 ++++++++++++++
> 1 file changed, 14 insertions(+)
>
>Index: linux-2.6.22/drivers/cpufreq/cpufreq.c
>===================================================================
>--- linux-2.6.22.orig/drivers/cpufreq/cpufreq.c
>+++ linux-2.6.22/drivers/cpufreq/cpufreq.c
>@@ -515,6 +515,8 @@ static ssize_t show_scaling_governor (st
> /**
>  * store_scaling_governor - store policy for the specified CPU
>  */
>+static int cpufreq_gov_initialized;
>+
> static ssize_t store_scaling_governor (struct cpufreq_policy * policy,
> 				       const char *buf, size_t count)
> {
>@@ -522,6 +524,9 @@ static ssize_t store_scaling_governor (s
> 	char	str_governor[16];
> 	struct cpufreq_policy new_policy;
> 
>+	/* opteron, do not load ondemand per default workaround variable */
>+	cpufreq_gov_initialized = 1;
>+
> 	ret = cpufreq_get_policy(&new_policy, policy->cpu);
> 	if (ret)
> 		return ret;
>@@ -1466,6 +1471,15 @@ static int __cpufreq_governor(struct cpu
> 	struct cpufreq_governor *gov = NULL;
> #endif
> 
>+#ifdef CONFIG_X86
>+	struct cpuinfo_x86 *c = &cpu_data[policy->cpu];
>+	if (!cpufreq_gov_initialized && strstr(c->x86_model_id, "Opteron")){
>+		if (policy->cpu == 0)
>+			printk(KERN_INFO "Opteron detected - Initialising cpufreq"
>+			       " with performance governor\n");
>+		policy->governor = gov;
>+	} else
>+#endif
> 	if (policy->governor->max_transition_latency &&
> 	    policy->cpuinfo.transition_latency >
> 	    policy->governor->max_transition_latency) {

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Attachments on bug 299891: 157786 | 157787 | 158046 | 164149 | 164150 | 173419 | 173480 | 173544 | 173793 | 174384 | 175114 | 175489