[PATCH V2 0/3] try to save some memory for kmem_cache in some cases

From: Wei Yang
Date: Tue May 02 2017 - 10:45:45 EST

kmem_cache is a frequently used data in kernel. During the code reading, I
found maybe we could save some space in some cases.

1. On 64bit arch, type int will occupy a word if it doesn't sit well.
2. cpu_slab->partial is just used when CONFIG_SLUB_CPU_PARTIAL is set
3. cpu_partial is just used when CONFIG_SLUB_CPU_PARTIAL is set, while just
save some space on 32bit arch.

define some macro to make the code more elegant

Wei Yang (3):
mm/slub: pack red_left_pad with another int to save a word
mm/slub: wrap cpu_slab->partial in CONFIG_SLUB_CPU_PARTIAL
mm/slub: wrap kmem_cache->cpu_partial in config

include/linux/slub_def.h | 34 ++++++++++++++++++-
mm/slub.c | 85 ++++++++++++++++++++++++++----------------------
2 files changed, 80 insertions(+), 39 deletions(-)