[Xen-devel] Re: [RFC PATCH 30/35] Add generic_page_range() function

[Zachary Amsden <zach@xxxxxxxxxx>]

Chris Wright wrote:
> Add a new mm function generic_page_range() which applies a given
> function to every pte in a given virtual address range in a given mm
> structure. This is a generic alternative to cut-and-pasting the Linux
> idiomatic pagetable walking code in every place that a sequence of
> PTEs must be accessed.
>
> Although this interface is intended to be useful in a wide range of
> situations, it is currently used specifically by several Xen
> subsystems, for example: to ensure that pagetables have been allocated
> for a virtual address range, and to construct batched special
> pagetable update requests to map I/O memory (in ioremap()).
>   
This interface is great, and highly useful.  But it doesn't seem to be 
able to work on native hardware, as it doesn't support large pages.
Zach

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