Re: [PATCH 2/7] slub: Use page-mapping to store address of page frame like done in SLAB

From: Pekka Enberg
Date: Wed Dec 10 2014 - 11:45:23 EST

On Wed, Dec 10, 2014 at 6:30 PM, Christoph Lameter <cl@xxxxxxxxx> wrote:
> SLAB uses the mapping field of the page struct to store a pointer to the
> begining of the objects in the page frame. Use the same field to store
> the address of the objects in SLUB as well. This allows us to avoid a
> number of invocations of page_address(). Those are mostly only used for
> debugging though so this should have no performance benefit.
> Signed-off-by: Christoph Lameter <cl@xxxxxxxxx>

Reviewed-by: Pekka Enberg <penberg@xxxxxxxxxx>
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at