Re: [Xen-devel] [PATCH, v2] reduce 'd' debug key's global impact

["Jan Beulich" <JBeulich@xxxxxxxxxx>]

>>> Keir Fraser <keir.fraser@xxxxxxxxxxxxx> 06.05.10 10:01 >>>
>Although I suppose the event-check vector has a cleaner interface for
>calling it and should be implemented for all architectures. If you add
>whatever new flag you need to irq_cpustat_t then it would be cheap to check,
>being a definite cache hit. I suppose each cpu would
>check-and-check-and-clear it, and then set it for the next CPU when it is
>done. That doesn't sound too bad.

Hmm, isn't irq_cpustat_t being used mostly on the local CPU so far,
and hence introducing reasons for bouncing the cache line wouldn't
be nice?

Jan


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