Re: [Xen-devel] [xen-unstable test] 104131: regressions - FAIL

["Tian, Kevin" <kevin.tian@xxxxxxxxx>]

> From: Xuquan (Quan Xu) [mailto:xuquan8@xxxxxxxxxx]
> Sent: Monday, January 23, 2017 6:57 PM
> 
> On January 20, 2017 5:09 PM, Quan Xu wrote:
> >btw, for PIR.. I find that there might be a bug in
> >__vmx_deliver_posted_interrupt()...
> >why test_and_set_bit(VCPU_KICK_SOFTIRQ, &softirq_pending(cpu)) ??
> >
> >static void __vmx_deliver_posted_interrupt(struct vcpu *v) { ...
> >        if ( !test_and_set_bit(VCPU_KICK_SOFTIRQ,
> >&softirq_pending(cpu)) ...
> >}
> >
> >Suppose that vCPUx is in guest mode, there are two (even more) interrupts
> >to vCPUx..
> >As the bit is set when delivers the first interrupt... the second interrupt 
> >is
> >pending until next VM entry -- by PIR to vIRR..
> >
> 
> Jan , Kevin
> Correct me if I am wrong...
> 
> Quan

I don't quite understand the point here. Can you elaborate?

Thanks
Kevin

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