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From: Greg KH <gregkh@linuxfoundation.org>
To: Vlastimil Babka <vbabka@suse.cz>
Cc: stable <stable@vger.kernel.org>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Minchan Kim <minchan@kernel.org>,
	Michal Hocko <mhocko@kernel.org>, linux-mm <linux-mm@kvack.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Mel Gorman <mgorman@techsingularity.net>
Subject: Re: [PATCH stable-only] mm: fix classzone_idx underflow in shrink_zones()
Date: Tue, 4 Jul 2017 10:55:37 +0200	[thread overview]
Message-ID: <20170704085537.GA20372@kroah.com> (raw)
In-Reply-To: <cf25f1a5-5276-90ea-1eac-f2a2aceffaef@suse.cz>

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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WARNING: multiple messages have this Message-ID (diff)
From: Greg KH <gregkh@linuxfoundation.org>
To: Vlastimil Babka <vbabka@suse.cz>
Cc: stable <stable@vger.kernel.org>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Minchan Kim <minchan@kernel.org>,
	Michal Hocko <mhocko@kernel.org>, linux-mm <linux-mm@kvack.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Mel Gorman <mgorman@techsingularity.net>
Subject: Re: [PATCH stable-only] mm: fix classzone_idx underflow in shrink_zones()
Date: Tue, 4 Jul 2017 10:55:37 +0200	[thread overview]
Message-ID: <20170704085537.GA20372@kroah.com> (raw)
In-Reply-To: <cf25f1a5-5276-90ea-1eac-f2a2aceffaef@suse.cz>

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

  reply	other threads:[~2017-07-04  8:55 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-07-04  8:45 [PATCH stable-only] mm: fix classzone_idx underflow in shrink_zones() Vlastimil Babka
2017-07-04  8:45 ` Vlastimil Babka
2017-07-04  8:45 ` Vlastimil Babka
2017-07-04  8:55 ` Greg KH [this message]
2017-07-04  8:55   ` Greg KH
2017-07-04  9:01 ` Michal Hocko
2017-07-04  9:01   ` Michal Hocko
2017-07-04 10:24 ` Mel Gorman
2017-07-04 10:24   ` Mel Gorman
2017-07-07  9:10 ` Patch "mm: fix classzone_idx underflow in shrink_zones()" has been added to the 4.4-stable tree gregkh
2017-07-07  9:10   ` gregkh
2017-07-07  9:10   ` gregkh

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