On September 06, 2016 5:05 PM, Jan Beulich <jbeul...@suse.com> >>>> On 06.09.16 at 10:53, <xuqu...@huawei.com> 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?
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