Changes since v9: - Rebase to 4.13-rc3. - Drop PATCH1 as it was already taken by Greg to char-misc tree. There're no functional dependencies on this patch so the series can go through a different tree (and it actually belongs to x86 if I got Ingo's comment right). - Add in missing void return type in PATCH1 [Colin King, Ingo Molnar, Greg KH] - A few minor fixes in what is now PATCH7: add pr_fmt, tiny style fix in hyperv_flush_tlb_others() [Andy Shevchenko] - Fix "error: implicit declaration of function 'virt_to_phys'" in PATCH2 reported by kbuild test robot (#include <asm/io.h>) - Add Steven's 'Reviewed-by:' to PATCH9. Original description: Hyper-V supports hypercalls for doing local and remote TLB flushing and gives its guests hints when using hypercall is preferred. While doing hypercalls for local TLB flushes is probably not practical (and is not being suggested by modern Hyper-V versions) remote TLB flush with a hypercall brings significant improvement. To test the series I wrote a special 'TLB trasher': on a 16 vCPU guest I was creating 32 threads which were doing 100000 mmap/munmaps each on some big file. Here are the results: Before: # time ./pthread_mmap ./randfile real 3m33.118s user 0m3.698s sys 3m16.624s After: # time ./pthread_mmap ./randfile real 2m19.920s user 0m2.662s sys 2m9.948s This series brings a number of small improvements along the way: fast hypercall implementation and using it for event signaling, rep hypercalls implementation, hyperv tracing subsystem (which only traces the newly added remote TLB flush for now). Vitaly Kuznetsov (9): x86/hyper-v: include hyperv/ only when CONFIG_HYPERV is set x86/hyper-v: make hv_do_hypercall() inline x86/hyper-v: fast hypercall implementation hyper-v: use fast hypercall for HVCALL_SIGNAL_EVENT x86/hyper-v: implement rep hypercalls hyper-v: globalize vp_index x86/hyper-v: use hypercall for remote TLB flush x86/hyper-v: support extended CPU ranges for TLB flush hypercalls tracing/hyper-v: trace hyperv_mmu_flush_tlb_others() MAINTAINERS | 1 + arch/x86/Kbuild | 2 +- arch/x86/hyperv/Makefile | 2 +- arch/x86/hyperv/hv_init.c | 90 ++++++------ arch/x86/hyperv/mmu.c | 272 ++++++++++++++++++++++++++++++++++++ arch/x86/include/asm/mshyperv.h | 147 ++++++++++++++++++- arch/x86/include/asm/trace/hyperv.h | 40 ++++++ arch/x86/include/uapi/asm/hyperv.h | 17 +++ arch/x86/kernel/cpu/mshyperv.c | 1 + drivers/hv/channel_mgmt.c | 20 +-- drivers/hv/connection.c | 7 +- drivers/hv/hv.c | 9 -- drivers/hv/hyperv_vmbus.h | 11 -- drivers/hv/vmbus_drv.c | 17 --- drivers/pci/host/pci-hyperv.c | 54 +------ include/linux/hyperv.h | 17 +-- 16 files changed, 533 insertions(+), 174 deletions(-) create mode 100644 arch/x86/hyperv/mmu.c create mode 100644 arch/x86/include/asm/trace/hyperv.h -- 2.13.3 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
