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

[Jun Kamada <kama@xxxxxxxxxxxxxx>]

Hi Yamahata-san,

On Mon, 4 Jun 2007 21:07:28 +0900
Isaku Yamahata <yamahata@xxxxxxxxxxxxx> wrote:
> On Mon, Jun 04, 2007 at 07:19:08PM +0900, Jun Kamada wrote:
> > 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?
> 
> The optimization seems to make sense.
> Then, Does it make difference for the optimization
> to be aware of PAGE_SIZE?

Could you explain more about the PAGE_SIZE optimization?

Current code merges overlapped address ranges without awareness of
PAGE_SIZE and page alignment. Merged address range should
be divided by PAGE_SIZE?

Thanks,

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



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