• Christoph Lameter's avatar
    slub: No need for per node slab counters if !SLUB_DEBUG · 0f389ec6
    Christoph Lameter authored
    The per node counters are used mainly for showing data through the sysfs API.
    If that API is not compiled in then there is no point in keeping track of this
    data. Disable counters for the number of slabs and the number of total slabs
    if !SLUB_DEBUG. Incrementing the per node counters is also accessing a
    potentially contended cacheline so this could actually be a performance
    benefit to embedded systems.
    
    SLABINFO support is also affected. It now must depends on SLUB_DEBUG (which
    is on by default).
    
    Patch also avoids a check for a NULL kmem_cache_node pointer in new_slab()
    if the system is not compiled with NUMA support.
    
    [penberg@cs.helsinki.fi: fix oops and move ->nr_slabs into CONFIG_SLUB_DEBUG]
    Signed-off-by: default avatarChristoph Lameter <clameter@sgi.com>
    Signed-off-by: default avatarPekka Enberg <penberg@cs.helsinki.fi>
    0f389ec6
Kconfig 27.8 KB