Re: [patch 7/7] powerpc: lockless get_user_pages_fast

Christoph Lameter
2008-06-11T04:40:25Z

On Wed, 11 Jun 2008, Nick Piggin wrote:

> > This is reversing the modification to make get_page_unless_zero() usable
> > with compound page heads. Will break the slab defrag patchset.
>
> Is the slab defrag patchset in -mm? Because you ignored my comment about
> this change that assertions should not be weakened until required by the
> actual patchset. I wanted to have these assertions be as strong as
> possible for the lockless pagecache patchset.

So you are worried about accidentally using get_page_unless_zero on a
compound page? What would be wrong about that?