On Mon, 16 Sep 2019, Pengfei Li wrote: > KMALLOC_NORMAL is the most frequently accessed, and kmalloc_caches[] > is initialized by different types of the same size. > > So modifying kmalloc_caches[type][idx] to kmalloc_caches[idx][type] > will benefit performance.
Why would that increase performance? Using your scheme means that the KMALLOC_NORMAL pointers are spread over more cachelines. Since KMALLOC_NORMAL is most frequently accessed this would cause a performance regression.
