From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Tue, 16 Sep 2008 21:13:55 +0900 From: KAMEZAWA Hiroyuki Subject: memcg: lazy_lru (was Re: [RFC] [PATCH 8/9] memcg: remove page_cgroup pointer from memmap) Message-Id: <20080916211355.277b625d.kamezawa.hiroyu@jp.fujitsu.com> In-Reply-To: <48CA9500.5060309@linux.vnet.ibm.com> References: <20080911200855.94d33d3b.kamezawa.hiroyu@jp.fujitsu.com> <20080911202249.df6026ae.kamezawa.hiroyu@jp.fujitsu.com> <48CA9500.5060309@linux.vnet.ibm.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: balbir@linux.vnet.ibm.com Cc: "xemul@openvz.org" , "hugh@veritas.com" , linux-mm@kvack.org, linux-kernel@vger.kernel.org, menage@google.com, Dave Hansen , "nickpiggin@yahoo.com.au" List-ID: On Fri, 12 Sep 2008 09:12:48 -0700 Balbir Singh wrote: > Kamezawa, > > I feel we can try the following approaches > > 1. Try per-node per-zone radix tree with dynamic allocation > 2. Try the approach you have > 3. Integrate with sparsemem (last resort for performance), Dave Hansen suggested > adding a mem_section member and using that. > > I am going to try #1 today and see what the performance looks like > I'm now writing *lazy* lru handing via per-cpu struct like pagevec. It seems works well (but not so fast as expected on 2cpu box....) I need more tests but it's not so bad to share the logic at this stage. I added 3 patches on to this set. (my old set need bug fix.) == [1] patches/page_count.patch ....get_page()/put_page() via page_cgroup. [2] patches/lazy_lru_free.patch ....free page_cgroup from LRU in lazy way. [3] patches/lazy_lru_add.patch ....add page_cgroup to LRU in lazy way. 3 patches will follow this mail. Because of speculative radix-tree lookup, page_count patch seems a bit difficult. Anyway, I'll make this patch readable and post again. Thanks, -Kame -- 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