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

David Miller
2007-06-29T09:06:45Z

From: Christoph Lameter <clameter@sgi.com>
Date: Fri, 29 Jun 2007 00:00:39 -0700 (PDT)

> 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?

Every single network packet.