RE: [Xen-ia64-devel] [PATCH] bug fix new_tlbflush_clock_period()

["Xu, Anthony" <anthony.xu@xxxxxxxxx>]

Isaku Yamahata write on 2007年2月6日 12:55:
> It consumes only several mega bytes (We can assume at least
> several giga bytes on a box.) and the tlb flush clock overflow
> would takes very long time
> The current implementation is intended to allow per-vcpu vhpt
> domain coexist with per-pcpu vhpt domain.

I understand your intention now,

> Currently we can only turn off per-vcpu vhpt system widely with
> "pervcpu_vhpt" boot option.
> The only missing part is how to pass the user configuration to xen
> domain creation and initialize it in per-domain fashion.
> 
> So your proposal is to remove such dynamic checks and
> make the per-vcpu vhpt code compile-time-only configuration.
> Or to allocate per-pcpu vhpt when per-pcph vhpt domain is created
> and to add check if per-pcph vhpt is allocated.
> Do you think it's worth while?

Because tlbflush_clock_local_flush is called unfrequently,
This will not impact overall performance.

I would like to support both per-vcpu and per-pcpu vhpt.


- Anthony

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