Re: [PATCH v8 02/22] Allow page fault handlers to perform the COW

[Kirill A. Shutemov]

On Tue, Jul 22, 2014 at 03:47:50PM -0400, Matthew Wilcox wrote:
> Currently COW of an XIP file is done by first bringing in a read-only
> mapping, then retrying the fault and copying the page.  It is much more
> efficient to tell the fault handler that a COW is being attempted (by
> passing in the pre-allocated page in the vm_fault structure), and allow
> the handler to perform the COW operation itself.
> 
> Signed-off-by: Matthew Wilcox <matthew.r.wilcox@xxxxxxxxx>
> Reviewed-by: Jan Kara <jack@xxxxxxx>

Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>

-- 
 Kirill A. Shutemov
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