RFC: switch vcpu context to use SRCU

Marcelo Tosatti kvm 1 version Sep 21, 2009 In review

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#	Subject and files	Size	Replies
1/10	KVM: modify memslots layout in struct kvm`arch/x86/kvm/mmu.c` `arch/x86/kvm/vmx.c` `arch/x86/kvm/x86.c` +3 more	+53 ~~-32~~	0 replies
2/10	KVM: modify alias layout in x86s struct kvm_arch`arch/x86/include/asm/kvm_host.h` `arch/x86/kvm/x86.c`	+22 -7	0 replies
3/10	KVM: switch dirty_log to mmu_lock protection`arch/x86/kvm/paging_tmpl.h` `arch/x86/kvm/x86.c` `virt/kvm/kvm_main.c`	+37 -9	3 replies
4/10	KVM: split kvm_arch_set_memory_region into prepare and commit`arch/ia64/kvm/kvm-ia64.c` `arch/s390/kvm/kvm-s390.c` `arch/x86/kvm/x86.c` +2 more	+61 ~~-40~~	1 reply
5/10	KVM: introduce gfn_to_pfn_memslot`include/linux/kvm_host.h` `virt/kvm/kvm_main.c`	+27 -8	0 replies
6/10	KVM: use gfn_to_pfn_memslot in kvm_iommu_map_pages`include/linux/kvm_host.h` `virt/kvm/iommu.c` `virt/kvm/kvm_main.c`	+8 ~~-10~~	0 replies
7/10	KVM: introduce kvm->srcu and convert kvm_set_memory_region to SRCU update`arch/ia64/kvm/kvm-ia64.c` `arch/x86/kvm/mmu.c` `arch/x86/kvm/vmx.c` +5 more	+112 ~~-57~~	8 replies
8/10	KVM: x86: switch kvm_set_memory_alias to SRCU update`arch/ia64/kvm/kvm-ia64.c` `arch/powerpc/kvm/powerpc.c` `arch/s390/kvm/kvm-s390.c` +5 more	+50 ~~-22~~	1 reply
9/10	KVM: convert io_bus to SRCU`arch/ia64/kvm/kvm-ia64.c` `arch/x86/kvm/i8254.c` `arch/x86/kvm/i8259.c` +6 more	+101 ~~-75~~	0 replies
10/10	KVM: switch vcpu context to use SRCU`arch/ia64/kvm/kvm-ia64.c` `arch/x86/kvm/mmu.c` `arch/x86/kvm/vmx.c` +2 more	+38 ~~-35~~	1 reply

No Reviewed-by, Acked-by or Tested-by trailers for v1 yet.

Cover letter [patch 00/10] RFC: switch vcpu context to use SRCU

Improves vmexit latency by ~= 13% on UP guest.

Still requires decent stress testing and careful review, but posting for early comments.