[SAFS]: fix a bug in NUMA memory allocation for page cache.
[SAFS]: fix a bug in NUMA memory allocation for page cache.

It seems numa_bind() messes up the memory allocation by
numa_alloc_onnode(). This is a temporary fix and seems to work well.

zheng-da/FlashX,silky/FlashGraph,zheng-da/FlashX,icoming/FlashX,icoming/FlashGraph,flashxio/FlashX,flashxio/FlashX,zheng-da/FlashX,icoming/FlashX,icoming/FlashX,silky/FlashGraph,flashxio/FlashX,icoming/FlashGraph,silky/FlashGraph,silky/FlashGraph,zheng-da/FlashX,icoming/FlashGraph,flashxio/FlashX,icoming/FlashX,zheng-da/FlashX,icoming/FlashX,flashxio/FlashX,silky/FlashGraph,icoming/FlashGraph,flashxio/FlashX,icoming/FlashGraph