From: Alex Williamson Date: Mon, 10 Dec 2012 17:33:38 +0000 (-0700) Subject: KVM: Increase user memory slots on x86 to 125 X-Git-Tag: v3.12-rc1~895^2~237 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=0f888f5acd0cd806d4fd9f4067276b3855a13309;p=kernel%2Fkernel-generic.git KVM: Increase user memory slots on x86 to 125 With the 3 private slots, this gives us a nice round 128 slots total. The primary motivation for this is to support more assigned devices. Each assigned device can theoretically use up to 8 slots (6 MMIO BARs, 1 ROM BAR, 1 spare for a split MSI-X table mapping) though it's far more typical for a device to use 3-4 slots. If we assume a typical VM uses a dozen slots for non-assigned devices purposes, we should always be able to support 14 worst case assigned devices or 28 to 37 typical devices. Reviewed-by: Gleb Natapov Signed-off-by: Alex Williamson Signed-off-by: Marcelo Tosatti --- diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 51d5210..c431b33 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -33,7 +33,7 @@ #define KVM_MAX_VCPUS 254 #define KVM_SOFT_MAX_VCPUS 160 -#define KVM_USER_MEM_SLOTS 32 +#define KVM_USER_MEM_SLOTS 125 /* memory slots that are not exposed to userspace */ #define KVM_PRIVATE_MEM_SLOTS 3 #define KVM_MEM_SLOTS_NUM (KVM_USER_MEM_SLOTS + KVM_PRIVATE_MEM_SLOTS)