Re: [Q] Default SLAB allocator

[Eric Dumazet]

On Tue, 2012-10-16 at 09:35 -0300, Ezequiel Garcia wrote:

> Now, returning to the fragmentation. The problem with SLAB is that
> its smaller cache available for kmalloced objects is 32 bytes;
> while SLUB allows 8, 16, 24 ...
> 
> Perhaps adding smaller caches to SLAB might make sense?
> Is there any strong reason for NOT doing this?

I would remove small kmalloc-XX caches, as sharing a cache line
is sometime dangerous for performance, because of false sharing.

They make sense only for very small hosts.



--
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/