From cc7335b2f6acc0f24c7fac80ce536301f7d52214 Mon Sep 17 00:00:00 2001 From: Konrad Rzeszutek Wilk Date: Mon, 23 Jan 2012 10:53:57 -0500 Subject: xen/setup/pm/acpi: Remove the call to boot_option_idle_override. We needed that call in the past to force the kernel to use default_idle (which called safe_halt, which called xen_safe_halt). But set_pm_idle_to_default() does now that, so there is no need to use this boot option operand. Signed-off-by: Konrad Rzeszutek Wilk --- arch/x86/xen/setup.c | 1 - 1 file changed, 1 deletion(-) (limited to 'arch/x86/xen/setup.c') diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index e03c63692176..12366238d07d 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -420,7 +420,6 @@ void __init xen_arch_setup(void) boot_cpu_data.hlt_works_ok = 1; #endif disable_cpuidle(); - boot_option_idle_override = IDLE_HALT; WARN_ON(set_pm_idle_to_default()); fiddle_vdso(); } -- cgit v1.2.3 From 48cdd8287f47a3cdad5b9273a5ef81bf605f7826 Mon Sep 17 00:00:00 2001 From: Konrad Rzeszutek Wilk Date: Tue, 13 Mar 2012 20:06:57 -0400 Subject: xen/cpufreq: Disable the cpu frequency scaling drivers from loading. By using the functionality provided by "[CPUFREQ]: provide disable_cpuidle() function to disable the API." Under the Xen hypervisor we do not want the initial domain to exercise the cpufreq scaling drivers. This is b/c the Xen hypervisor is in charge of doing this as well and we can end up with both the Linux kernel and the hypervisor trying to change the P-states leading to weird performance issues. Acked-by: Jan Beulich Signed-off-by: Konrad Rzeszutek Wilk [v2: Fix compile error spotted by Benjamin Schweikert ] --- arch/x86/xen/setup.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/x86/xen/setup.c') diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index 12366238d07d..1ba8dff26753 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -10,6 +10,7 @@ #include #include #include +#include #include #include @@ -420,6 +421,7 @@ void __init xen_arch_setup(void) boot_cpu_data.hlt_works_ok = 1; #endif disable_cpuidle(); + disable_cpufreq(); WARN_ON(set_pm_idle_to_default()); fiddle_vdso(); } -- cgit v1.2.3