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xen-devel
[Xen-devel] RE: lock issue for vpic_irq_negative_edge
>From: Keir Fraser [mailto:Keir.Fraser@xxxxxxxxxxxx]
>Sent: 2007年3月29日 15:34
>
>On 29/3/07 03:39, "Tian, Kevin" <kevin.tian@xxxxxxxxx> wrote:
>
>> Hi, Keir,
>> vPIC has a private lock, but there's no acquisition in the
>> injection
>> path. This should be a potential issue for change on IRR. Then the
>> assertion (ASSERT(vpic_is_locked(vpic)) is likely to be failed within
>> vpic_irq_negative_edge if debug option is enabled. Is anything
>> missing here?
>
>No, there actually isn't a private vPIC lock any more. If you look at the
>top of the vpic.c file you'll see that the 'vpic lock' is actually an alias
>for the generic irq_lock. This is always acquired by the caller of
>vpic_irq_negative_edge().
>
> -- Keir
>
Oh, yes, my mistake on position of parenthesis. :-)
Thanks
Kevin
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