Re: [Xen-devel] [PATCH 0/6] grantable and address conversion patches

[Isaku Yamahata <yamahata@xxxxxxxxxxxxx>]

Thanks for your comments.

On Mon, Apr 10, 2006 at 09:54:20AM +0100, Keir Fraser wrote:

> 1/6: We can't apply this as it would change the public 3.0 interface 
> for x86/64. Do you really need a long? If so, we'll have to make that 
> field arch-dependent in some way.

Perhaps a long is not needed for several years at least.


> 2/6: This is a poor fix. Either we should make the ring size fixed 
> (e.g., 4kB) rather than architectural page-sized, or grants should be 
> dynamically allocated in netfront rather than statically allocated. 
> This was done quite some time ago for blkfront, and would be the 
> preferred (although more difficult) fix here.

I'll go this direction.


> 4/6: Make the function that fills in map/unmap requests arch-specific? 
> At least filling in host_addr should be arch-specific -- we don't 
> really want to overload dev_bus_addr like this.

O.K. I'll introduce virt_to_host_addr() to xenLinux and make a new patch.
Is there any explanaition about host_addr and dev_bus_addr?
When I wrote this patch,I guessed that host_addr should have been
arch-indepedent and dev_bus_addr could be arch-depedent.
But it was wrong. I couldn't find any good explaination/usage samples
of these field.

-- 
yamahata

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