On Wed, Sep 04, 2013 at 11:38:04AM +0800, Wanpeng Li wrote: > Hi Joonsoo, > On Fri, Aug 23, 2013 at 03:35:39PM +0900, Joonsoo Kim wrote: > >On Thu, Aug 22, 2013 at 04:47:25PM +0000, Christoph Lameter wrote: > >> On Thu, 22 Aug 2013, Joonsoo Kim wrote: > > > [...] > >struct slab's free = END > >kmem_bufctl_t array: ACTIVE ACTIVE ACTIVE ACTIVE ACTIVE > ><we get object at index 0> > > > > Is there a real item for END in kmem_bufctl_t array as you mentioned above? > I think the kmem_bufctl_t array doesn't include that and the last step is > not present. Yes, there is. BUFCTL_END is what I told for END. A slab is initialized in cache_init_objs() and a last step in that function is to set last entry of a free array of a slab to BUFCTL_END. This value remains in the whole life cycle of a slab. Thanks. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>