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From: Wei Yang <richard.weiyang@gmail.com>
To: cl@linux.com, penberg@kernel.org, rientjes@google.com,
	iamjoonsoo.kim@lge.com, akpm@linux-foundation.org
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
	Wei Yang <richard.weiyang@gmail.com>
Subject: [PATCH 0/3] try to save some memory for kmem_cache in some cases
Date: Sun, 30 Apr 2017 19:31:49 +0800	[thread overview]
Message-ID: <20170430113152.6590-1-richard.weiyang@gmail.com> (raw)

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.

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 |  6 +++-
 mm/slub.c                | 88 ++++++++++++++++++++++++++++++++----------------
 2 files changed, 64 insertions(+), 30 deletions(-)

-- 
2.11.0

             reply	other threads:[~2017-04-30 11:32 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-04-30 11:31 Wei Yang [this message]
2017-04-30 11:31 ` [PATCH 1/3] mm/slub: pack red_left_pad with another int to save a word Wei Yang
2017-04-30 11:31 ` [PATCH 2/3] mm/slub: wrap cpu_slab->partial in CONFIG_SLUB_CPU_PARTIAL Wei Yang
2017-05-01  2:41   ` Matthew Wilcox
2017-05-01  7:39     ` Wei Yang
2017-05-01  8:20     ` Wei Yang
2017-05-01 14:39       ` Matthew Wilcox
2017-05-01 15:15         ` Wei Yang
2017-04-30 11:31 ` [PATCH 3/3] mm/slub: wrap kmem_cache->cpu_partial in config CONFIG_SLUB_CPU_PARTIAL Wei Yang
2017-05-01 15:37   ` Wei Yang
2017-04-30 21:22 ` [PATCH 0/3] try to save some memory for kmem_cache in some cases Christoph Lameter

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