Hi Mario, On Wed, Oct 22, 2014 at 03:34:05PM -0700, Mario Smarduch wrote: >This patch series introduces dirty page logging for ARMv7 and adds some degree >of generic dirty logging support for x86, armv7 and later armv8. > >I implemented Alex's suggestion after he took a look at the patches at kvm >forum to simplify the generic/arch split - leaving mips, powerpc, s390, >(ia64 although broken) unchanged. x86/armv7 now share some dirty logging code. >armv8 dirty log patches have been posted and tested but for time being armv8 >is non-generic as well. > >I briefly spoke to most of you at kvm forum, and this is the patch series >I was referring to. Implementation changed from previous version (patches >1 & 2), those who acked previous revision, please review again. > >Last 4 patches (ARM) have been rebased for newer kernel, with no signifcant >changes. > >Testing: >- Generally live migration + checksumming of source/destination memory regions > is used validate correctness. Could you tell me where to get the checksum you are using? In addition, checksum should be used at which point of live migration? Regards, Wanpeng Li >- qemu machvirt, VExpress - Exynos 5440, FastModels - lmbench + dirty guest > memory cycling. >- ARMv8 Foundation Model/kvmtool - Due to slight overlap in 2nd stage handlers > did a basic bringup using qemu. >- x86_64 qemu default machine model, tested migration on HP Z620, tested > convergence for several dirty page rates > >See https://github.com/mjsmar/arm-dirtylog-tests > - Dirtlogtest-setup.pdf for ARMv7 > - https://github.com/mjsmar/arm-dirtylog-tests/tree/master/v7 - README > >The patch affects armv7,armv8, mips, ia64, powerpc, s390, x86_64. Patch >series has been compiled for affected architectures: > >- x86_64 - defconfig >- ia64 - ia64-linux-gcc4.6.3 - defconfig, ia64 Kconfig defines BROKEN worked > around that to make sure new changes don't break build. Eventually build > breaks due to other reasons. >- mips - mips64-linux-gcc4.6.3 - malta_kvm_defconfig >- ppc - powerpc64-linux-gcc4.6.3 - pseries_defconfig >- s390 - s390x-linux-gcc4.6.3 - defconfig >- armv8 - aarch64-linux-gnu-gcc4.8.1 - defconfig > >ARMv7 Dirty page logging implementation overivew- >- initially write protects VM RAM memory region - 2nd stage page tables >- add support to read dirty page log and again write protect the dirty pages > - second stage page table for next pass. >- second stage huge page are dissolved into small page tables to keep track of > dirty pages at page granularity. Tracking at huge page granularity limits > migration to an almost idle system. Small page size logging supports higher > memory dirty rates. >- In the event migration is canceled, normal behavior is resumed huge pages > are rebuilt over time. > >Changes since v11: >- Implemented Alex's comments to simplify generic layer. > >Changes since v10: >- addressed wanghaibin comments >- addressed Christoffers comments > >Changes since v9: >- Split patches into generic and architecture specific variants for TLB Flushing > and dirty log read (patches 1,2 & 3,4,5,6) >- rebased to 3.16.0-rc1 >- Applied Christoffers comments. > >Mario Smarduch (6): > KVM: Add architecture-defined TLB flush support > KVM: Add generic support for dirty page logging > arm: KVM: Add ARMv7 API to flush TLBs > arm: KVM: Add initial dirty page locking infrastructure > arm: KVM: dirty log read write protect support > arm: KVM: ARMv7 dirty page logging 2nd stage page fault > > arch/arm/include/asm/kvm_asm.h | 1 + > arch/arm/include/asm/kvm_host.h | 14 +++ > arch/arm/include/asm/kvm_mmu.h | 20 ++++ > arch/arm/include/asm/pgtable-3level.h | 1 + > arch/arm/kvm/Kconfig | 2 + > arch/arm/kvm/Makefile | 1 + > arch/arm/kvm/arm.c | 2 + > arch/arm/kvm/interrupts.S | 11 ++ > arch/arm/kvm/mmu.c | 209 +++++++++++++++++++++++++++++++-- > arch/x86/include/asm/kvm_host.h | 3 - > arch/x86/kvm/Kconfig | 1 + > arch/x86/kvm/Makefile | 1 + > arch/x86/kvm/x86.c | 86 -------------- > include/linux/kvm_host.h | 4 + > virt/kvm/Kconfig | 6 + > virt/kvm/dirtylog.c | 112 ++++++++++++++++++ > virt/kvm/kvm_main.c | 2 + > 17 files changed, 380 insertions(+), 96 deletions(-) > create mode 100644 virt/kvm/dirtylog.c > >-- >1.7.9.5 > >-- >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 -- To unsubscribe from this list: send the line "unsubscribe kvm-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
