lkml.org 
[lkml]   [2006]   [Aug]   [10]   [last100]   RSS Feed
Views: [more markup]  [less markup]  [headers]  [forward] 
 
Messages in this thread
/
DateThu, 10 Aug 2006 14:01:53 +0900
FromKAMEZAWA Hiroyuki <>
SubjectRe: [RFC] Simple Slab: A slab allocator with minimal meta information
Hi,

On Wed, 9 Aug 2006 17:52:00 -0700 (PDT)
Christoph Lameter <clameter@sgi.com> wrote:

> struct page overloading:
> 
> - _mapcout	=> Used to count the objects in use in a slab
> - mapping	=> Reference to the slab structure
> - index		=> Pointer to the first free element in a slab
> - lru		=> Used for list management.
> 
it seems it's time that the page struct should have more unions ;)


> There is no freelist for slabs. slabs are immediately returned to the page
> allocator.  The page allocator has its own per cpu page queues that should provide
> enough caching.
> 

I think that the advantage of Slab allocator is 
- object is already initizalized at setup, so you don't have to initialize it again at
  allocation.
- object is initialized only once when slab is created.

If a slab page is returned to page allocator ASAP, # of object initilization may
increase. 

-Kame

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-08-10 05:05    [W:0.264 / U:0.000 seconds]
©2003-2008 Jasper Spaans