Re: [PATCH 5/7] slub: Use end_token instead of NULL to terminate freelists

From: Pekka Enberg
Date: Wed Dec 10 2014 - 11:59:19 EST

On Wed, Dec 10, 2014 at 6:30 PM, Christoph Lameter <cl@xxxxxxxxx> wrote:
> Ending a list with NULL means that the termination of a list is the same
> for all slab pages. The pointers of freelists otherwise always are
> pointing to the address space of the page. Make termination of a
> list possible by setting the lowest bit in the freelist address
> and use the start address of a page if no other address is available
> for list termination.
> This will allow us to determine the page struct address from a
> freelist pointer in the future.
> Signed-off-by: Christoph Lameter <cl@xxxxxxxxx>

Reviewed-by: Pekka Enberg <penberg@xxxxxxxxxx>
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