Nick Piggin wrote:

> I've always thought the bouncing issue was a silly one and should be
> fixed, of course. Maybe the reason my fix was vetoed was lack of numbers.
> Christoph, would you oblige? I'll dig out the patch and repost.

Something like this roughly should get rid of ZERO_PAGE _count and _mapcount
manipulation for anonymous pages. (others still exist, XIP and /dev/zero, but
they should not be a large concern AFAIKS).

I haven't booted this, but it is a quick forward port + some fixes and
simplifications.

-- 
SUSE Labs, Novell Inc.