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