On Mon, 22 Oct 2012, Glauber Costa wrote: > Right now, slab and slub have fields in struct page to derive which > cache a page belongs to, but they do it slightly differently. > > slab uses a field called slab_cache, that lives in the third double > word. slub, uses a field called "slab", living outside of the > doublewords area. > > Ideally, we could use the same field for this. Since slub heavily makes > use of the doubleword region, there isn't really much room to move > slub's slab_cache field around. Since slab does not have such strict > placement restrictions, we can move it outside the doubleword area. > > The naming used by slab, "slab_cache", is less confusing, and it is > preferred over slub's generic "slab". > > Signed-off-by: Glauber Costa <glom...@parallels.com> > CC: Christoph Lameter <c...@linux.com> > CC: Pekka Enberg <penb...@kernel.org> > CC: David Rientjes <rient...@google.com>
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