From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr0-f198.google.com (mail-wr0-f198.google.com [209.85.128.198]) by kanga.kvack.org (Postfix) with ESMTP id 68E996B0292 for ; Tue, 4 Jul 2017 04:55:40 -0400 (EDT) Received: by mail-wr0-f198.google.com with SMTP id v88so44932381wrb.1 for ; Tue, 04 Jul 2017 01:55:40 -0700 (PDT) Received: from mail.linuxfoundation.org (mail.linuxfoundation.org. [140.211.169.12]) by mx.google.com with ESMTPS id n18si12886641wmi.169.2017.07.04.01.55.38 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 04 Jul 2017 01:55:39 -0700 (PDT) Date: Tue, 4 Jul 2017 10:55:37 +0200 From: Greg KH 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: Sender: owner-linux-mm@kvack.org List-ID: To: Vlastimil Babka Cc: stable , Johannes Weiner , Minchan Kim , Michal Hocko , linux-mm , LKML , Mel Gorman 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 -- 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