From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754482Ab3LPOnr (ORCPT ); Mon, 16 Dec 2013 09:43:47 -0500 Received: from eusmtp01.atmel.com ([212.144.249.242]:16791 "EHLO eusmtp01.atmel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754384Ab3LPOnp (ORCPT ); Mon, 16 Dec 2013 09:43:45 -0500 Date: Mon, 16 Dec 2013 15:43:43 +0100 From: Ludovic Desroches To: Joonsoo Kim CC: , , , , Ludovic Desroches Subject: Re: possible regression on 3.13 when calling flush_dcache_page Message-ID: <20131216144343.GD9627@ldesroches-Latitude-E6320> Mail-Followup-To: Joonsoo Kim , linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, linux-arm-kernel@lists.infradead.org References: <20131212143149.GI12099@ldesroches-Latitude-E6320> <20131212143618.GJ12099@ldesroches-Latitude-E6320> <20131213015909.GA8845@lge.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20131213015909.GA8845@lge.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, On Fri, Dec 13, 2013 at 10:59:09AM +0900, Joonsoo Kim wrote: > On Thu, Dec 12, 2013 at 03:36:19PM +0100, Ludovic Desroches wrote: > > fix mmc mailing list address error > > > > On Thu, Dec 12, 2013 at 03:31:50PM +0100, Ludovic Desroches wrote: > > > Hi, > > > > > > With v3.13-rc3 I have an error when the atmel-mci driver calls > > > flush_dcache_page (log at the end of the message). > > > > > > Since I didn't have it before, I did a git bisect and the commit introducing > > > the error is the following one: > > > > > > 106a74e slab: replace free and inuse in struct slab with newly introduced active > > > > > > I don't know if this commit has introduced a bug or if it has revealed a bug > > > in the atmel-mci driver. > > Hello, > > I think that this commit may not introduce a bug. This patch remove one > variable on slab management structure and replace variable name. So there > is no functional change. > If I have reverted this patch and other ones you did on top of it and the issue disappear. > I doubt that side-effect of this patch reveals a bug in other place. > Side-effect is reduced memory usage for slab management structure. It would > makes some slabs have more objects with more density since slab management > structure is sometimes on the page for objects. So if it diminishes, more > objects can be in the page. > > Anyway, I will look at it more. If you have any progress, please let me know. No progress at the moment. Regards Ludovic > > Thanks. > > -- > 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 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ludovic Desroches Subject: Re: possible regression on 3.13 when calling flush_dcache_page Date: Mon, 16 Dec 2013 15:43:43 +0100 Message-ID: <20131216144343.GD9627@ldesroches-Latitude-E6320> References: <20131212143149.GI12099@ldesroches-Latitude-E6320> <20131212143618.GJ12099@ldesroches-Latitude-E6320> <20131213015909.GA8845@lge.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Return-path: Content-Disposition: inline In-Reply-To: <20131213015909.GA8845@lge.com> Sender: owner-linux-mm@kvack.org To: Joonsoo Kim Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Ludovic Desroches List-Id: linux-mmc@vger.kernel.org Hello, On Fri, Dec 13, 2013 at 10:59:09AM +0900, Joonsoo Kim wrote: > On Thu, Dec 12, 2013 at 03:36:19PM +0100, Ludovic Desroches wrote: > > fix mmc mailing list address error > > > > On Thu, Dec 12, 2013 at 03:31:50PM +0100, Ludovic Desroches wrote: > > > Hi, > > > > > > With v3.13-rc3 I have an error when the atmel-mci driver calls > > > flush_dcache_page (log at the end of the message). > > > > > > Since I didn't have it before, I did a git bisect and the commit introducing > > > the error is the following one: > > > > > > 106a74e slab: replace free and inuse in struct slab with newly introduced active > > > > > > I don't know if this commit has introduced a bug or if it has revealed a bug > > > in the atmel-mci driver. > > Hello, > > I think that this commit may not introduce a bug. This patch remove one > variable on slab management structure and replace variable name. So there > is no functional change. > If I have reverted this patch and other ones you did on top of it and the issue disappear. > I doubt that side-effect of this patch reveals a bug in other place. > Side-effect is reduced memory usage for slab management structure. It would > makes some slabs have more objects with more density since slab management > structure is sometimes on the page for objects. So if it diminishes, more > objects can be in the page. > > Anyway, I will look at it more. If you have any progress, please let me know. No progress at the moment. Regards Ludovic > > Thanks. > > -- > 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 -- 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 From mboxrd@z Thu Jan 1 00:00:00 1970 From: ludovic.desroches@atmel.com (Ludovic Desroches) Date: Mon, 16 Dec 2013 15:43:43 +0100 Subject: possible regression on 3.13 when calling flush_dcache_page In-Reply-To: <20131213015909.GA8845@lge.com> References: <20131212143149.GI12099@ldesroches-Latitude-E6320> <20131212143618.GJ12099@ldesroches-Latitude-E6320> <20131213015909.GA8845@lge.com> Message-ID: <20131216144343.GD9627@ldesroches-Latitude-E6320> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hello, On Fri, Dec 13, 2013 at 10:59:09AM +0900, Joonsoo Kim wrote: > On Thu, Dec 12, 2013 at 03:36:19PM +0100, Ludovic Desroches wrote: > > fix mmc mailing list address error > > > > On Thu, Dec 12, 2013 at 03:31:50PM +0100, Ludovic Desroches wrote: > > > Hi, > > > > > > With v3.13-rc3 I have an error when the atmel-mci driver calls > > > flush_dcache_page (log at the end of the message). > > > > > > Since I didn't have it before, I did a git bisect and the commit introducing > > > the error is the following one: > > > > > > 106a74e slab: replace free and inuse in struct slab with newly introduced active > > > > > > I don't know if this commit has introduced a bug or if it has revealed a bug > > > in the atmel-mci driver. > > Hello, > > I think that this commit may not introduce a bug. This patch remove one > variable on slab management structure and replace variable name. So there > is no functional change. > If I have reverted this patch and other ones you did on top of it and the issue disappear. > I doubt that side-effect of this patch reveals a bug in other place. > Side-effect is reduced memory usage for slab management structure. It would > makes some slabs have more objects with more density since slab management > structure is sometimes on the page for objects. So if it diminishes, more > objects can be in the page. > > Anyway, I will look at it more. If you have any progress, please let me know. No progress at the moment. Regards Ludovic > > Thanks. > > -- > To unsubscribe, send a message with 'unsubscribe linux-mm' in > the body to majordomo at kvack.org. For more info on Linux MM, > see: http://www.linux-mm.org/ . > Don't email: email at kvack.org