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d3111e6cce
Patch series "try to save some memory for kmem_cache in some cases", v2. 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. This patch (of 3): On 64bit arch, struct is 8-bytes aligned, so int will occupy a word if it doesn't sit well. This patch pack red_left_pad with reserved to save 8 bytes for struct kmem_cache on a 64bit arch. Link: http://lkml.kernel.org/r/20170502144533.10729-2-richard.weiyang@gmail.com Signed-off-by: Wei Yang <richard.weiyang@gmail.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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