Re: [Xen-ia64-devel] [Patch 4/4] [RFC] Xwindow: Modify pci_acpi_scan_root()

[Jun Kamada <kama@xxxxxxxxxxxxxx>]

Hi, Yamahata-san,

Thank you for your comments.

On Sat, 2 Jun 2007 09:57:48 +0900
Isaku Yamahata <yamahata@xxxxxxxxxxxxx> wrote:
> You are trying to avoid duplicated ioremap hypercall on
> overlapped regions. On the other hand, duplicated ioremap hypercall
> doesn't harm as long as arguments are consistent.
> So the code can be simplified, I suppose.
> 
> But I'm not sure whether this optimization is necessary or
> how region overlaps.

On my test environment, 231 hypercalls were issued with no optimization.
On the other hand, number of hypercalls ware reduced to 25 with the
optimization.

It seems that the optimization provides significant effect, maybe. Could
you give us any comment?

Best regards,

-----
Jun Kamada
Virtual Systems Development Div.
Platform Technology Development Unit
Fujitsu Ltd.
kama@xxxxxxxxxxxxxx



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