Re: [PATCH] KVM: Add coalesced PIO support

Hi Wanpeng, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on kvm/linux-next] [also build test WARNING on v4.18-rc4 next-20180710] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day

Re: [PATCH] KVM: Add coalesced PIO support

Hi Wanpeng, Thank you for the patch! Yet something to improve: [auto build test ERROR on kvm/linux-next] [also build test ERROR on v4.18-rc4 next-20180709] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linu

Re: [PATCH] KVM: Add coalesced PIO support

Hi Wanpeng, Thank you for the patch! Yet something to improve: [auto build test ERROR on kvm/linux-next] [also build test ERROR on v4.18-rc4 next-20180709] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linu

[PATCH] KVM: Add coalesced PIO support

Windows I/O, such as the real-time clock. The address register (port 0x70 in the RTC case) can use coalesced I/O, cutting the number of userspace exits by half when reading or writing the RTC. Guest access rtc like this: write register index to 0x70, then write or read data from 0x71. writing 0x7