Re: [Xen-devel] [RFC PATCH] x86/apicv: fix RTC periodic timer and apicv issue

["Xuquan (Euler)" <xuquan8@xxxxxxxxxx>]

On September 06, 2016 5:05 PM, Jan Beulich <JBeulich@xxxxxxxx>
>>>> On 06.09.16 at 10:53, <xuquan8@xxxxxxxxxx> wrote:
>> to be honest, my fix is also a tradeoff.. w/ my patch, multiple
>> pending pt interrupt instances may be combined as one injection of
>> guest timer interrupt..
>>  but as Yang said, It should be ok since it happens rarely and even
>> native OS will encounter the same problem if it disable the interrupt for too
>long.
>
>And one OS may properly deal with that situation while another might not. For
>example, let me remind you of issues the hypervisor had in earlier days when no
>event/softirq processing happened for long enough, resulting in time
>management issues due to missed platform timer overflow handling. IOW an OS
>may avoid that situation by simply not disabling IRQs for too long a time.
>
Thanks for your reminding,
Jan, do you have any suggestion to fix this PT and apicv issue?
What do you think about Kevin's?

Quan


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