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Date: Tue, 4 Jul 2017 10:55:37 +0200 From: Greg KH <gregkh@...uxfoundation.org> To: Vlastimil Babka <vbabka@...e.cz> Cc: stable <stable@...r.kernel.org>, Johannes Weiner <hannes@...xchg.org>, Minchan Kim <minchan@...nel.org>, Michal Hocko <mhocko@...nel.org>, linux-mm <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>, Mel Gorman <mgorman@...hsingularity.net> Subject: Re: [PATCH stable-only] mm: fix classzone_idx underflow in shrink_zones() 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
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