On (04/19/17 04:51), Matthew Wilcox wrote:
[..]
> > > > Another approach is the API does normal thing for non-aligned prefix and
> > > > tail space and fast thing for aligned space.
> > > > Otherwise, it would be happy if the API has WARN_ON non-page SIZE
> > > > aligned
> > > > address.
>
> Why not just use memcpy()? Is copy_page() significantly faster than
> memcpy() for a PAGE_SIZE amount of data?
that's a good point.
I was going to ask yesterday - do we even need copy_page()? arch that
provides well optimized copy_page() quite likely provides somewhat
equally optimized memcpy(). so may be copy_page() is not even needed?
-ss
