On Sat, Sep 14, 2013 at 02:18:49PM +0200, Andrew Jones wrote: > Take CONFIG_KVM_MAX_VCPUS from arm32, but set the default to 255. > > Signed-off-by: Andrew Jones <drjones@xxxxxxxxxx> > --- > arch/x86/include/asm/kvm_host.h | 5 +++-- > arch/x86/kvm/Kconfig | 10 ++++++++++ > 2 files changed, 13 insertions(+), 2 deletions(-) > > diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h > index c76ff74a98f2e..e7e9b523a8f7e 100644 > --- a/arch/x86/include/asm/kvm_host.h > +++ b/arch/x86/include/asm/kvm_host.h > @@ -31,8 +31,9 @@ > #include <asm/msr-index.h> > #include <asm/asm.h> > > -#define KVM_MAX_VCPUS 255 > -#define KVM_SOFT_MAX_VCPUS 160 > +#define KVM_MAX_VCPUS CONFIG_KVM_MAX_VCPUS > +#define KVM_SOFT_MAX_VCPUS min(160, KVM_MAX_VCPUS) > + > #define KVM_USER_MEM_SLOTS 125 > /* memory slots that are not exposed to userspace */ > #define KVM_PRIVATE_MEM_SLOTS 3 > diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig > index a47a3e54b964b..e9532c33527ee 100644 > --- a/arch/x86/kvm/Kconfig > +++ b/arch/x86/kvm/Kconfig > @@ -52,6 +52,16 @@ config KVM > > If unsure, say N. > > +config KVM_MAX_VCPUS > + int "Number maximum supported virtual CPUs per VM" > + depends on KVM > + default 255 > + help > + Static number of max supported virtual CPUs per VM. > + > + Set to a lower number to save some resources. Set to a higher > + number to test scalability. > + Maximum this can save is around 2K per VM. This is pretty insignificant considering overall memory footprint even smallest VM has. > config KVM_INTEL > tristate "KVM for Intel processors support" > depends on KVM > -- > 1.8.1.4 -- Gleb. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
