Re: [PATCH] Shrink rbtree

[Nick Piggin]

Hi David,

Doesn't seem like a bad idea...

David Woodhouse wrote:
> Our rbtree implementation uses a whole integer for colour information.
> In fact, because of alignment constraints on a 64-bit machine it'll be a
> whole 64 bits there. We only need a single bit, though -- and we know
> the pointers are always going to be aligned. So let's just use the

How do we know the pointers are always going to be aligned? IIRC
struct address_space needed to be explicitly aligned when doing
this trick in page->mapping because some platform byte aligned it.

Nick

--
SUSE Labs, Novell Inc.
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