Messages in this thread | | | Date | Fri, 23 Aug 2013 13:42:59 +0000 | From | Christoph Lameter <> | Subject | Re: [PATCH 05/16] slab: remove cachep in struct slab_rcu |
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On Fri, 23 Aug 2013, Joonsoo Kim wrote:
> On Thu, Aug 22, 2013 at 05:53:00PM +0000, Christoph Lameter wrote: > > On Thu, 22 Aug 2013, Joonsoo Kim wrote: > > > > > We can get cachep using page in struct slab_rcu, so remove it. > > > > Ok but this means that we need to touch struct page. Additional cacheline > > in cache footprint. > > In following patch, we overload RCU_HEAD to LRU of struct page and > also overload struct slab to struct page. So there is no > additional cacheline footprint at final stage.
If you do not use rcu (standard case) then you have an additional cacheline.
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