[PATCH 1/2] slub: reduce failure of this_cpu_cmpxchg in put_cpu_partial() after unfreezing

In current implementation, after unfreezing, we doesn't touch oldpage, so it remain 'NOT NULL'. When we call this_cpu_cmpxchg() with this old oldpage, this_cpu_cmpxchg() is mostly be failed. We can change value of oldpage to NULL after unfreezing, because unfreeze_partial() ensure that all the

[PATCH 1/2] slub: reduce failure of this_cpu_cmpxchg in put_cpu_partial() after unfreezing

In current implementation, after unfreezing, we doesn't touch oldpage, so it remain 'NOT NULL'. When we call this_cpu_cmpxchg() with this old oldpage, this_cpu_cmpxchg() is mostly be failed. We can change value of oldpage to NULL after unfreezing, because unfreeze_partial() ensure that all the