mm, slab: rename kmalloc-node cache to kmalloc-<size>

SLAB as part of its bootstrap pre-creates one kmalloc cache that can fit
the kmem_cache_node management structure, and puts it into the generic
kmalloc cache array (e.g. for 128b objects).  The name of this cache is
"kmalloc-node", which is confusing for readers of /proc/slabinfo as the
cache is used for generic allocations (and not just the kmem_cache_node
struct) and it appears as the kmalloc-128 cache is missing.

An easy solution is to use the kmalloc-<size> name when pre-creating the
cache, which we can get from the kmalloc_info array.

Example /proc/slabinfo before the patch:

  ...
  kmalloc-256         1647   1984    256   16    1 : tunables  120   60    8 : slabdata    124    124    828
  kmalloc-192         1974   1974    192   21    1 : tunables  120   60    8 : slabdata     94     94    133
  kmalloc-96          1332   1344    128   32    1 : tunables  120   60    8 : slabdata     42     42    219
  kmalloc-64          2505   5952     64   64    1 : tunables  120   60    8 : slabdata     93     93    715
  kmalloc-32          4278   4464     32  124    1 : tunables  120   60    8 : slabdata     36     36    346
  kmalloc-node        1352   1376    128   32    1 : tunables  120   60    8 : slabdata     43     43     53
  kmem_cache           132    147    192   21    1 : tunables  120   60    8 : slabdata      7      7      0

After the patch:

  ...
  kmalloc-256         1672   2160    256   16    1 : tunables  120   60    8 : slabdata    135    135    807
  kmalloc-192         1992   2016    192   21    1 : tunables  120   60    8 : slabdata     96     96    203
  kmalloc-96          1159   1184    128   32    1 : tunables  120   60    8 : slabdata     37     37    116
  kmalloc-64          2561   4864     64   64    1 : tunables  120   60    8 : slabdata     76     76    785
  kmalloc-32          4253   4340     32  124    1 : tunables  120   60    8 : slabdata     35     35    270
  kmalloc-128         1256   1280    128   32    1 : tunables  120   60    8 : slabdata     40     40     39
  kmem_cache           125    147    192   21    1 : tunables  120   60    8 : slabdata      7      7      0

[[email protected]: export the whole kmalloc_info structure instead of just a name accessor, per Christoph Lameter]
  Link: http://lkml.kernel.org/r/[email protected]
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Vlastimil Babka <[email protected]>
Reviewed-by: Matthew Wilcox <[email protected]>
Cc: Joonsoo Kim <[email protected]>
Cc: David Rientjes <[email protected]>
Cc: Pekka Enberg <[email protected]>
Cc: Christoph Lameter <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions