From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 20 Aug 2008 19:05:55 +0900 From: KAMEZAWA Hiroyuki Subject: [RFC][PATCH -mm 5/7] memcg: prefetch mem cgroup per zone Message-Id: <20080820190555.438aad2b.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <20080820185306.e897c512.kamezawa.hiroyu@jp.fujitsu.com> References: <20080819173014.17358c17.kamezawa.hiroyu@jp.fujitsu.com> <20080820185306.e897c512.kamezawa.hiroyu@jp.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: KAMEZAWA Hiroyuki Cc: LKML , "balbir@linux.vnet.ibm.com" , "yamamoto@valinux.co.jp" , "nishimura@mxp.nes.nec.co.jp" , ryov@valinux.co.jp, "linux-mm@kvack.org" List-ID: Address of "mz" can be calculated in early stage. prefetch it (we always do spin_lock later.) Signed-off-by: KAMEZAWA Hiroyuki --- mm/memcontrol.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) Index: mmtom-2.6.27-rc3+/mm/memcontrol.c =================================================================== --- mmtom-2.6.27-rc3+.orig/mm/memcontrol.c +++ mmtom-2.6.27-rc3+/mm/memcontrol.c @@ -694,6 +694,8 @@ static int mem_cgroup_charge_common(stru } } + mz = mem_cgroup_zoneinfo(mem, page_to_nid(page), page_zonenum(page)); + prefetchw(mz); pc->mem_cgroup = mem; pc->page = page; pc->flags = 0; @@ -716,7 +718,6 @@ static int mem_cgroup_charge_common(stru page_assign_page_cgroup(page, pc); - mz = page_cgroup_zoneinfo(pc); spin_lock_irqsave(&mz->lru_lock, flags); __mem_cgroup_add_list(mz, pc); spin_unlock_irqrestore(&mz->lru_lock, flags); -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org