RE: [Xen-devel] [PATCH] Fix softlockup issue after vcpu hotplug

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

>From: Keir Fraser [mailto:Keir.Fraser@xxxxxxxxxxxx]
>Sent: 2007年1月30日 22:23
>
>On 30/1/07 2:11 pm, "Tian, Kevin" <kevin.tian@xxxxxxxxx> wrote:
>
>> BTW, do you think whether it's worthy to destroy vcpu from
>> scheduler when it's down and then re-init that vcpu into scheduler
>> when it's on? I don't know whether this will make any influence to
>> accounting of scheduler. Actually domain save/restore doesn't show
>> this bug, and one obvious distinct compared to vcpu-hotplug is that
>> domain is restored in a new context...
>
>I wouldn't expect this to make any significant difference to scheduling
>accounting, certainly over a multi-second time period.
>
>Does the time you hoy-unplug the vcpu for make a difference to how
>often you
>see this problem? Did you try repro'ing with a 2.6.16 kernel?
>
> -- Keir

I can't tell, since I didn't use same pace in each round by manual 
operation. I tried both immediate plug after unplug, and a longer 
interval than 10s. But the first warning jumped out when I finished 
the test and ready to send out the 'good' news. :-(

I'll repro 2.6.16 kernel tomorrow, because remote box crashed just
now.

Thanks,
Kevin

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