• Andrew Morton's avatar
    [PATCH] per-zone LRU locking · a8382cf1
    Andrew Morton authored
    Now the LRUs are per-zone, make their lock per-zone as well.
    
    In this patch the per-zone lock shares a cacheline with the zone's
    buddy list lock, which is very bad.  Some groundwork is needed to fix
    this well.
    
    This change is expected to be a significant win on NUMA, where most
    page allocation comes from the local node's zones.
    
    For NUMA the `struct zone' itself should really be placed in that
    node's memory, which is something the platform owners should look at.
    However the internode cache will help here.
    
    Per-node kswapd would make heaps of sense too.
    a8382cf1
rmap.c 10.2 KB