Am 23.10.2014 00:34, schrieb Mario Smarduch: > 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. > - 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 > Patches 1-3 seem to work fine on s390. The other patches are arm-only (well cant find 5 and 6) so I guess its ok for s390. -- 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
