[dm-devel] slab: introduce the flag SLAB_MINIMIZE_WASTE

[Christopher Lameter]

On Mon, 16 Apr 2018, Mikulas Patocka wrote:

> >
> > Or an increase in slab_max_order
>
> But that will increase it for all slabs (often senselessly - i.e.
> kmalloc-4096 would have order 4MB).

4MB? Nope.... That is a power of two slab so no wasted space even with
order 0.

Its not a senseless increase. The more objects you fit into a slab page
the higher the performance of the allocator.


> I need to increase it just for dm-bufio slabs.

If you do this then others will want the same...