Re: [PATCH] Containment measures for slab objects on scatter gather lists

Christoph Lameter
2007-06-29T07:00:49Z

On Thu, 28 Jun 2007, David Miller wrote:

> Really, it would be great if we could treat kmalloc() objects
> just like real pages. Everything wants to do I/O on pages
> but sometimes (like the networking) you have a kmalloc
> chunk which is technically just a part of a page.
>
> The fact that there is no easy way to make this work is
> frustrating :-)

There is easy way: Allocate a page and just use the first N bytes. You can
specify the bytes to be used when putting the memory onto the scatter
gather list. This wastes memory but it works. You have real refcounting
since you got a real page.

How frequent are these objects?