On Mon, Dec 10, 2012 at 10:32:39AM -0700, Alex Williamson wrote: > v2: Update 02/10 to not check userspace_addr when slot is removed. > Yoshikawa-san withdrew objection to increase slot_bitmap prior > to his series to remove slot_bitmap. > > This series does away with any kind of complicated resizing of the > slot array and simply does a one time increase. I do compact struct > kvm_memory_slot a bit to take better advantage of the space we are > using. This reduces each slot from 64 bytes (x86_64) to 56 bytes. > By enforcing the API around valid operations for an unused slot and > fields that can be modified runtime, I found and was able to fix a > bug in iommu mapping for slots. The renames enabled me to find the > previously posted bug fix for catching slot overlaps. > > As mentioned in the series, the primary motivation for increasing > memory slots is assigned devices. With this, I've been able to > assign 30 devices to a single VM and could have gone further, but > ran out of SRIOV VFs. Typical devices use anywhere from 2-4 slots > and max out at 8 slots. 125 user slots (3 private slots) allows > us to support between 28 and 56 typical devices per VM. > > Tested on x86_64, compiled on ia64, powerpc, and s390. > > Thanks, > Alex > Reviewed-by: Gleb Natapov <gleb@xxxxxxxxxx> > --- > > Alex Williamson (10): > kvm: Restrict non-existing slot state transitions > kvm: Check userspace_addr when modifying a memory slot > kvm: Fix iommu map/unmap to handle memory slot moves > kvm: Minor memory slot optimization > kvm: Rename KVM_MEMORY_SLOTS -> KVM_USER_MEM_SLOTS > kvm: Make KVM_PRIVATE_MEM_SLOTS optional > kvm: struct kvm_memory_slot.user_alloc -> bool > kvm: struct kvm_memory_slot.flags -> u32 > kvm: struct kvm_memory_slot.id -> short > kvm: Increase user memory slots on x86 to 125 > > > arch/ia64/include/asm/kvm_host.h | 4 -- > arch/ia64/kvm/kvm-ia64.c | 8 ++-- > arch/powerpc/include/asm/kvm_host.h | 6 +-- > arch/powerpc/kvm/book3s_hv.c | 2 - > arch/powerpc/kvm/powerpc.c | 4 +- > arch/s390/include/asm/kvm_host.h | 4 -- > arch/s390/kvm/kvm-s390.c | 4 +- > arch/x86/include/asm/kvm_host.h | 8 ++-- > arch/x86/include/asm/vmx.h | 6 +-- > arch/x86/kvm/vmx.c | 6 +-- > arch/x86/kvm/x86.c | 10 ++--- > include/linux/kvm_host.h | 24 +++++++----- > virt/kvm/kvm_main.c | 72 +++++++++++++++++++++++------------ > 13 files changed, 90 insertions(+), 68 deletions(-) -- 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
