Re: [PATCH v2] slub: move kmem_cache_node into it's own cacheline

From: Pekka Enberg
Date: Sat May 22 2010 - 04:36:00 EST

Alexander Duyck wrote:
This patch is meant to improve the performance of SLUB by moving the local
kmem_cache_node lock into it's own cacheline separate from kmem_cache.
This is accomplished by simply removing the local_node when NUMA is enabled.

On my system with 2 nodes I saw around a 5% performance increase w/
hackbench times dropping from 6.2 seconds to 5.9 seconds on average. I
suspect the performance gain would increase as the number of nodes
increases, but I do not have the data to currently back that up.

Signed-off-by: Alexander Duyck <alexander.h.duyck@xxxxxxxxx>

Thanks for the fix, Alexander!

Yanmin and Alex, can I have your Tested-by or Acked-by please so we can close "[Bug #15713] hackbench regression due to commit 9dfc6e68bfe6e" after this patch is merged?

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