Re: [Xen-devel] [PATCH] VMX: wbinvd when vmentry under UC

["Jan Beulich" <jbeulich@xxxxxxxx>]

>>> "Liu, Jinsong" <jinsong.liu@xxxxxxxxx> 11/28/13 8:17 AM >>>
>Liu, Jinsong wrote:
>> Yes. reprogram_timer here just delay timer a little slot, say, 1~2ms.
>> I think it's OK, i.e. at any point of wbinvd() operation at
>> hypervisor, or any irq disabled area, timer interrupt in fact also
>> has good chance to be delayed some time -- however at TIMER_SOFTIRQ,
>> all expired thing would be executed, and re-calculated and set next
>> time point via reprogram_timer -- that's OK.     
>
>Comments/thoughts about this option?

Apart from continuing to be very uncertain that this won't have any
bad side effects, I'm also rather concerned that you deal with one
special case interrupt here, ignoring other potentially high rate ones
(like such coming from NICs).

Jan


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