Re: [PATCH v3 3/5] slab: restrict the number of objects in a slab

[David Rientjes]

On Mon, 2 Dec 2013, Joonsoo Kim wrote:

> To prepare to implement byte sized index for managing the freelist
> of a slab, we should restrict the number of objects in a slab to be less
> or equal to 256, since byte only represent 256 different values.
> Setting the size of object to value equal or more than newly introduced
> SLAB_OBJ_MIN_SIZE ensures that the number of objects in a slab is less or
> equal to 256 for a slab with 1 page.
> 
> If page size is rather larger than 4096, above assumption would be wrong.
> In this case, we would fall back on 2 bytes sized index.
> 
> If minimum size of kmalloc is less than 16, we use it as minimum object
> size and give up this optimization.
> 
> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx>

Acked-by: David Rientjes <rientjes@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  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/