From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wg0-f48.google.com (mail-wg0-f48.google.com [74.125.82.48]) by kanga.kvack.org (Postfix) with ESMTP id EB4D16B0037 for ; Fri, 11 Jul 2014 10:51:13 -0400 (EDT) Received: by mail-wg0-f48.google.com with SMTP id x13so1180131wgg.31 for ; Fri, 11 Jul 2014 07:51:10 -0700 (PDT) Received: from mx1.redhat.com (mx1.redhat.com. [209.132.183.28]) by mx.google.com with ESMTPS id lh10si4442699wic.54.2014.07.11.07.50.29 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 11 Jul 2014 07:50:29 -0700 (PDT) Message-ID: <53BFF995.5020602@redhat.com> Date: Fri, 11 Jul 2014 10:49:57 -0400 From: Rik van Riel MIME-Version: 1.0 Subject: Re: [PATCH] mm/page-writeback.c: fix divide by zero in bdi_dirty_limits References: <20140711081656.15654.19946.stgit@localhost.localdomain> In-Reply-To: <20140711081656.15654.19946.stgit@localhost.localdomain> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Maxim Patlasov , akpm@linux-foundation.org Cc: linux-kernel@vger.kernel.org, mhocko@suse.cz, linux-mm@kvack.org, kosaki.motohiro@jp.fujitsu.com, fengguang.wu@intel.com, jweiner@redhat.com -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 07/11/2014 04:18 AM, Maxim Patlasov wrote: > Under memory pressure, it is possible for dirty_thresh, calculated > by global_dirty_limits() in balance_dirty_pages(), to equal zero. > Then, if strictlimit is true, bdi_dirty_limits() tries to resolve > the proportion: > > bdi_bg_thresh : bdi_thresh = background_thresh : dirty_thresh > > by dividing by zero. > > Signed-off-by: Maxim Patlasov Acked-by: Rik van Riel - -- All rights reversed -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJTv/mVAAoJEM553pKExN6Dw8UH/1KgQrLYDTVQIzvaXNxPwxOv xXqrWAnFf+mOflA/Tu/TqOwPUV20YSWTAuJU/NbyLSR0Ak15beCjH4ObifpgZgR+ k9lvJNHEk6XUQH0nERsHcwbNZMGtLBAvyw1oRCVXm6V1IVpbpp0IckP29KP5Ibs4 FChNNna/h7zOTpgysTtuKDO6JGuPy+sCjK5aNVH0jSTd4ENtTD1HtfkgtU/OZVyS m8afzJ0sp/A1sQGy+41ZorR3I0dAmtX3Qtx335QjrZQAy8bT3jCLBLjEHW9xQhCh afuZhfHdrXHiNh8RZnLgeFWiVzYHDc6ytoD7aZQsxaFZIlyccVRzc7SvarrT4ys= =jTrs -----END PGP SIGNATURE----- -- 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