sure. glad to a fix on this! -----Original Message----- From: Pekka Enberg [mailto:penberg@xxxxxxxxxxxxxx] Sent: 2010年5月22日 16:36 To: Duyck, Alexander H Cc: cl@xxxxxxxxx; linux-mm@xxxxxxxxx; Shi, Alex; yanmin_zhang@xxxxxxxxxxxxxxx; akpm@xxxxxxxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; rjw@xxxxxxx Subject: Re: [PATCH v2] slub: move kmem_cache_node into it's own cacheline 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? Pekka ?韬{.n???檩jg???a?旃???)钋???骅w+h?璀?ｙ/i?⒏??⒎???Щ ??m?? ?)钋???痂?^??觥??ザ?v???O璁?f??i?⒏?