From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx203.postini.com [74.125.245.203]) by kanga.kvack.org (Postfix) with SMTP id BBF736B0031 for ; Thu, 12 Sep 2013 10:21:18 -0400 (EDT) Date: Thu, 12 Sep 2013 14:21:17 +0000 From: Christoph Lameter Subject: Re: [PATCH 07/16] slab: overloading the RCU head over the LRU for RCU free In-Reply-To: <20130912065549.GC8055@lge.com> Message-ID: <00000141128c2585-743bf539-ce6f-45ef-a68e-3b4547a2af07-000000@email.amazonses.com> References: <1377161065-30552-1-git-send-email-iamjoonsoo.kim@lge.com> <1377161065-30552-8-git-send-email-iamjoonsoo.kim@lge.com> <000001410d765d3a-0f3f8df2-dccb-455a-a929-f1fd018700d2-000000@email.amazonses.com> <20130912065549.GC8055@lge.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Joonsoo Kim Cc: Pekka Enberg , Andrew Morton , David Rientjes , linux-mm@kvack.org, linux-kernel@vger.kernel.org On Thu, 12 Sep 2013, Joonsoo Kim wrote: > On Wed, Sep 11, 2013 at 02:39:22PM +0000, Christoph Lameter wrote: > > On Thu, 22 Aug 2013, Joonsoo Kim wrote: > > > > > With build-time size checking, we can overload the RCU head over the LRU > > > of struct page to free pages of a slab in rcu context. This really help to > > > implement to overload the struct slab over the struct page and this > > > eventually reduce memory usage and cache footprint of the SLAB. > > > > Looks fine to me. Can you add the rcu_head to the struct page union? This > > kind of overload is used frequently elsewhere as well. Then cleanup other > > cases of such uses (such as in SLUB). > > Okay. But I will implement it seprately because I don't know where the cases > are now and some inverstigation would be needed. Do it just for this case. The others can be done later. -- 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