[v3,0/4] mm, slab: Make kmalloc_info[] contain all types of names

Message

Pengfei Li Sept. 10, 2019, 1:26 a.m. UTC

Changes in v3
--
1. restore __initconst (patch 1/4)
2. rename patch 3/4
3. add more clarification for patch 4/4

Changes in v2
--
1. remove __initconst (patch 1/5)
2. squash patch 2/5
3. add ack tag from Vlastimil Babka


There are three types of kmalloc, KMALLOC_NORMAL, KMALLOC_RECLAIM
and KMALLOC_DMA.

The name of KMALLOC_NORMAL is contained in kmalloc_info[].name,
but the names of KMALLOC_RECLAIM and KMALLOC_DMA are dynamically
generated by kmalloc_cache_name().

Patch1 predefines the names of all types of kmalloc to save
the time spent dynamically generating names.

The other 4 patches did some cleanup work.

These changes make sense, and the time spent by new_kmalloc_cache()
has been reduced by approximately 36.3%.

                         Time spent by
                         new_kmalloc_cache()
5.3-rc7                       66264
5.3-rc7+patch                 42188


Pengfei Li (4):
  mm, slab: Make kmalloc_info[] contain all types of names
  mm, slab: Remove unused kmalloc_size()
  mm, slab_common: use enum kmalloc_cache_type to iterate over kmalloc
    caches
  mm, slab_common: Make the loop for initializing KMALLOC_DMA start from
    1

 include/linux/slab.h |  20 ---------
 mm/slab.c            |   7 +--
 mm/slab.h            |   2 +-
 mm/slab_common.c     | 101 +++++++++++++++++++++++--------------------
 4 files changed, 59 insertions(+), 71 deletions(-)