Re: pool_cache, big items and physical address

[Thor Lancelot Simon <tls%rek.tjls.com@localhost>]

On Sun, Jan 13, 2008 at 10:37:56PM +0100, Manuel Bouyer wrote:
> On Sun, Jan 13, 2008 at 10:10:32PM +0100, Manuel Bouyer wrote:
> > Hi,
> > when a pool cache is used with items larger than a page size
> > (I want 3 * PAGE_SIZE), do we have any guarantee that the
> > memory returned will be physically contigous ?
> > 
> > I couldn't find information on this in the man page.
> 
> It looks like pool(9) can't be used for object larger than PAGE_SIZE.

It can, but you have to fake up a "page" allocator as the buffer cache
does.  A warning -- the items must then be power-of-2 in size.

Thor