diff options
| author | Alex Williamson <alex.williamson@redhat.com> | 2012-12-10 10:33:38 -0700 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2012-12-13 23:25:25 -0200 |
| commit | 0f888f5acd0cd806d4fd9f4067276b3855a13309 (patch) | |
| tree | ecf15c9e3384ef55d93ae0533b5e1d4280b43c7f | |
| parent | 1e702d9af5d633cf0eca76f6340b3c50fbb5a4e5 (diff) | |
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 <gleb@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 51d52108f10..c431b33271f 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) |