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x-vs=clean score=-100 state=0 X-ME-VSCategory: clean X-CM-Envelope: MS4wfOa8d1ZHYC7L83jwRaiyPwQe4dpvOLwSrVFFQY4VIVq5+C6cQOoN0NSFDHwD/LDzNy5jpCzLE34my1CxFiJZOuTsVhSCQYStTuaj9tvOB4Sa/Nbo9WZO BB23M3uk3/ldCgdw67JpGH91bybI3b8+0i81TWY8SoGqGqW8LVn1sjSMJ21/LoNCG/Fq3+AIeC3bWPKgirpTv9tiR8qO89GV768ezAwP5ti5dPbCxcc3c4UN X-CM-Analysis: v=2.3 cv=FKU1Odgs c=1 sm=1 tr=0 a=UK1r566ZdBxH71SXbqIOeA==:117 a=UK1r566ZdBxH71SXbqIOeA==:17 a=kj9zAlcOel0A:10 a=Kd1tUaAdevIA:10 a=VnNF1IyMAAAA:8 a=VwQbUJbxAAAA:8 a=uumCjD83CAN6e9AYI3YA:9 a=CjuIK1q_8ugA:10 a=1R1Xb7_w0-cA:10 a=OREKyDgYLcYA:10 a=AjGcO6oz07-iQ99wixmX:22 X-ME-CMScore: 0 X-ME-CMCategory: none Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751406AbeDENuF (ORCPT ); Thu, 5 Apr 2018 09:50:05 -0400 Received: from out5-smtp.messagingengine.com ([66.111.4.29]:58765 "EHLO out5-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751165AbeDENuE (ORCPT ); Thu, 5 Apr 2018 09:50:04 -0400 X-ME-Sender: Date: Thu, 5 Apr 2018 15:50:02 +0200 From: Greg KH To: Claudio Imbrenda Cc: linux-kernel@vger.kernel.org, akpm@linux-foundation.org, aarcange@redhat.com, minchan@kernel.org, kirill.shutemov@linux.intel.com, linux-mm@kvack.org, hughd@google.com, borntraeger@de.ibm.com, gerald.schaefer@de.ibm.com, stable@vger.kernel.org Subject: Re: [PATCH v1 1/1] mm/ksm: fix inconsistent accounting of zero pages Message-ID: <20180405135002.GA23486@kroah.com> References: <1522931274-15552-1-git-send-email-imbrenda@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1522931274-15552-1-git-send-email-imbrenda@linux.vnet.ibm.com> User-Agent: Mutt/1.9.4 (2018-02-28) Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: On Thu, Apr 05, 2018 at 02:27:54PM +0200, Claudio Imbrenda wrote: > When using KSM with use_zero_pages, we replace anonymous pages > containing only zeroes with actual zero pages, which are not anonymous. > We need to do proper accounting of the mm counters, otherwise we will > get wrong values in /proc and a BUG message in dmesg when tearing down > the mm. > > Fixes: e86c59b1b1 ("mm/ksm: improve deduplication of zero pages with colouring") > > Signed-off-by: Claudio Imbrenda > --- > mm/ksm.c | 7 +++++++ > 1 file changed, 7 insertions(+) This is not the correct way to submit patches for inclusion in the stable kernel tree. Please read: https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html for how to do this properly.