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Date:   Wed, 15 May 2019 08:20:35 -0700
From:   Matthew Wilcox <willy@infradead.org>
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     Lech Perczak <l.perczak@camlintechnologies.com>,
        Al Viro <viro@zeniv.linux.org.uk>,
        Eric Dumazet <edumazet@google.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Piotr Figiel <p.figiel@camlintechnologies.com>,
        Krzysztof =?utf-8?Q?Drobi=C5=84ski?= 
        <k.drobinski@camlintechnologies.com>,
        Pawel Lenkow <p.lenkow@camlintechnologies.com>,
        "linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: Recurring warning in page_copy_sane (inside copy_page_to_iter)
 when running stress tests involving drop_caches
Message-ID: <20190515152035.GE31704@bombadil.infradead.org>
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 <011a16e4-6aff-104c-a19b-d2bd11caba99@camlintechnologies.com>
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 <20190515150406.GA22540@kroah.com>
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On Wed, May 15, 2019 at 05:04:06PM +0200, Greg Kroah-Hartman wrote:
> > Greg, can you consider 6daef95b8c914866a46247232a048447fff97279 for
> > backporting to stable?  Nobody realised it was a bugfix at the time it
> > went in.  I suspect there aren't too many of us running HIGHMEM kernels
> > any more.
> > 
> 
> Sure, what kernel version(s) should this go to?  4.19 and newer?

Looks like the problem was introduced with commit
a90bcb86ae700c12432446c4aa1819e7b8e172ec so 4.14 and newer, I think.