From mboxrd@z Thu Jan 1 00:00:00 1970 From: Lai Jiangshan Subject: Re: [PATCH 2/4] slub,rcu: don't assume the size of struct rcu_head Date: Wed, 02 Mar 2011 10:55:57 +0800 Message-ID: <4D6DB1BD.60003@cn.fujitsu.com> References: <4D6CA852.3060303@cn.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: Pekka Enberg , Ingo Molnar , "Paul E. McKenney" , Eric Dumazet , "David S. Miller" , Matt Mackall , linux-mm@kvack.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org To: Christoph Lameter Return-path: In-Reply-To: Sender: owner-linux-mm@kvack.org List-Id: netdev.vger.kernel.org On 03/01/2011 11:11 PM, Christoph Lameter wrote: > On Tue, 1 Mar 2011, Pekka Enberg wrote: > >> The SLAB and SLUB patches are fine by me if there are going to be real >> users for this. Christoph, Paul? > > The solution is a bit overkill. It would be much simpler to add a union to > struct page that has lru and the rcu in there similar things can be done > for SLAB and the network layer. A similar issue already exists for the > spinlock in struct page. Lets follow the existing way of handling this. I don't want to impact the whole system too much to touch struct page. The solution changes existed things little, and the reversed data may just make use of the pad data. > > Struct page may be larger for debugging purposes already because of the > need for extended spinlock data. > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ > -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org