In page fault handlers, both mapping_level_dirty_bitmap() and mapping_level() do a memory slot search, binary search, through kvm_vcpu_gfn_to_memslot(), which may not be negligible especially for virtual machines with many memory slots. With a bit of cleanup effort, the patch set reduces this overhead. [PATCH 1/5] KVM: x86: MMU: Make force_pt_level bool [PATCH 2/5] KVM: x86: MMU: Simplify force_pt_level calculation code in FNAME(page_fault)() [PATCH 3/5] KVM: x86: MMU: Merge mapping_level_dirty_bitmap() into mapping_level() [PATCH 4/5] KVM: x86: MMU: Remove mapping_level_dirty_bitmap() [PATCH 5/5] KVM: x86: MMU: Eliminate an extra memory slot search in mapping_level() Takuya -- 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
