RE: [Xen-ia64-devel] PATCH: cleanup of tlbflush

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

>From: Tristan Gingold [mailto:Tristan.Gingold@xxxxxxxx]
>Sent: 2006年5月10日 15:29
>> At least one simple enhancement
>> we can do is to change syntax of domain_dirty_cpumask. We can
>> change it to indicate processors that domain is ever running on. Then
>> update point only happens at creation/destroy/migration, or even
>> pause/unpause. Though this simple strategy is not fine-grained, we
>> can still achieve benefit especially when domain is bound.
>One use of domain_dirty_cpumask is to flush vtlb when a page is
>ungranted.
>If this mask is ever set, doing IOs trash the machine.
>IMHO, this is the next major Xen/ia64 challenge: dealing correctly with
>granted page.
>

Not clear about this one. Could you elaborate more? How dose IO cause 
to trash the machine?

Thanks,
Kevin

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