• Pavel Tatashin's avatar
    mm: update callers to use HASH_ZERO flag · 3d375d78
    Pavel Tatashin authored
    Update dcache, inode, pid, mountpoint, and mount hash tables to use
    HASH_ZERO, and remove initialization after allocations.  In case of
    places where HASH_EARLY was used such as in __pv_init_lock_hash the
    zeroed hash table was already assumed, because memblock zeroes the
    memory.
    
    CPU: SPARC M6, Memory: 7T
    Before fix:
      Dentry cache hash table entries: 1073741824
      Inode-cache hash table entries: 536870912
      Mount-cache hash table entries: 16777216
      Mountpoint-cache hash table entries: 16777216
      ftrace: allocating 20414 entries in 40 pages
      Total time: 11.798s
    
    After fix:
      Dentry cache hash table entries: 1073741824
      Inode-cache hash table entries: 536870912
      Mount-cache hash table entries: 16777216
      Mountpoint-cache hash table entries: 16777216
      ftrace: allocating 20414 entries in 40 pages
      Total time: 3.198s
    
    CPU: Intel Xeon E5-2630, Memory: 2.2T:
    Before fix:
      Dentry cache hash table entries: 536870912
      Inode-cache hash table entries: 268435456
      Mount-cache hash table entries: 8388608
      Mountpoint-cache hash table entries: 8388608
      CPU: Physical Processor ID: 0
      Total time: 3.245s
    
    After fix:
      Dentry cache hash table entries: 536870912
      Inode-cache hash table entries: 268435456
      Mount-cache hash table entries: 8388608
      Mountpoint-cache hash table entries: 8388608
      CPU: Physical Processor ID: 0
      Total time: 3.244s
    
    Link: http://lkml.kernel.org/r/1488432825-92126-4-git-send-email-pasha.tatashin@oracle.comSigned-off-by: default avatarPavel Tatashin <pasha.tatashin@oracle.com>
    Reviewed-by: default avatarBabu Moger <babu.moger@oracle.com>
    Cc: David Miller <davem@davemloft.net>
    Cc: Al Viro <viro@zeniv.linux.org.uk>
    Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    3d375d78
pid.c 15 KB