On Fri, 26 Feb 2016, js1...@gmail.com wrote: > We can fail to setup off slab in some conditions. Even in this case, > debug pagealloc increases cache size to PAGE_SIZE in advance and it is > waste because debug pagealloc cannot work for it when it isn't the off > slab. To improve this situation, this patch checks first that this cache > with increased size is suitable for off slab. It actually increases cache > size when it is suitable for off-slab, so possible waste is removed.
Maybe add some explanations to the code? You tried to simplify it earlier and make it understandable. This makes it difficult to understand it.
