Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751509Ab3JTSFX (ORCPT ); Sun, 20 Oct 2013 14:05:23 -0400 Received: from a9-99.smtp-out.amazonses.com ([54.240.9.99]:37323 "EHLO a9-99.smtp-out.amazonses.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751140Ab3JTSFW (ORCPT ); Sun, 20 Oct 2013 14:05:22 -0400 Date: Sun, 20 Oct 2013 18:05:21 +0000 From: Christoph Lameter X-X-Sender: cl@gentwo.org To: JoonSoo Kim cc: Joonsoo Kim , Pekka Enberg , Andrew Morton , David Rientjes , Linux Memory Management List , LKML , Wanpeng Li Subject: Re: [PATCH v2 13/15] slab: use struct page for slab management In-Reply-To: Message-ID: <00000141d70af320-21d92853-2cfb-4292-af09-dd57d406ab8b-000000@email.amazonses.com> References: <1381913052-23875-1-git-send-email-iamjoonsoo.kim@lge.com> <1381913052-23875-14-git-send-email-iamjoonsoo.kim@lge.com> <00000141c7d66282-aa92b1f2-2a69-424b-9498-8e5367304d32-000000@email.amazonses.com> User-Agent: Alpine 2.02 (DEB 1266 2009-07-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-SES-Outgoing: 2013.10.20-54.240.9.99 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 768 Lines: 18 On Sat, 19 Oct 2013, JoonSoo Kim wrote: > I search the history of struct page and find that the SLUB use mapping field > in past (2007 year). At that time, you inserted VM_BUG_ON(PageSlab(page)) > ('b5fab14') into page_mapping() function to find remaining use. Recently, > I never hear that this is triggered and 6 years have passed since inserting > VM_BUG_ON(), so I guess there is no problem to use it. > If this argument is reasonable, please give me an ACK :) > > Thanks. Acked-by: Christoph Lameter -- 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/