From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752189AbdGDIzj (ORCPT ); Tue, 4 Jul 2017 04:55:39 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:40846 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751960AbdGDIzi (ORCPT ); Tue, 4 Jul 2017 04:55:38 -0400 Date: Tue, 4 Jul 2017 10:55:37 +0200 From: Greg KH To: Vlastimil Babka Cc: stable , Johannes Weiner , Minchan Kim , Michal Hocko , linux-mm , LKML , Mel Gorman Subject: Re: [PATCH stable-only] mm: fix classzone_idx underflow in shrink_zones() Message-ID: <20170704085537.GA20372@kroah.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.8.3 (2017-05-23) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jul 04, 2017 at 10:45:43AM +0200, Vlastimil Babka wrote: > Hi, > > I realize this is against the standard stable policy, but I see no other > way, because the mainline accidental fix is part of 34+ patch reclaim > rework, that would be absurd to try to backport into stable. The fix is > a one-liner though. > > The bug affects at least 4.4.y, and likely also older stable trees that > backported commit 7bf52fb891b6, which itself was a fix for 3.19 commit > 6b4f7799c6a5. You could revert the 7bf52fb891b6 backport, but then 32bit > with highmem might suffer from OOM or thrashing. I need a bunch of acks from developers in this area before I can take this patch :) thanks, greg k-h