linux-kernel - [PATCH V2 0/3] try to save some memory for kmem

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Message-Id: <20170502144533.10729-1-richard.weiyang@gmail.com>
Date:   Tue,  2 May 2017 22:45:30 +0800
From:   Wei Yang <richard.weiyang@...il.com>
To:     cl@...ux.com, penberg@...nel.org, rientjes@...gle.com,
        iamjoonsoo.kim@....com, akpm@...ux-foundation.org,
        willy@...radead.org
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        Wei Yang <richard.weiyang@...il.com>
Subject: [PATCH V2 0/3] try to save some memory for kmem_cache in some cases

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.

v2:
   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
    CONFIG_SLUB_CPU_PARTIAL

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

-- 
2.11.0