Received: by 2002:a25:4158:0:0:0:0:0 with SMTP id o85csp46991yba; Mon, 20 May 2019 04:46:40 -0700 (PDT) X-Google-Smtp-Source: APXvYqxpPXUFA1pGCoAzMipC7egS/bdcz37Wh7Hb3JdzI1nw5UcxIJ3tOuPiIp4FSsYG6Q4MvNTl X-Received: by 2002:a17:902:15c5:: with SMTP id a5mr76114830plh.39.1558352800390; Mon, 20 May 2019 04:46:40 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1558352800; cv=none; d=google.com; s=arc-20160816; b=abxQXxrXuhU+bPmxX/NmnQyhtDzMG5acoypTqVB8uXg2IxHy8Zjni24UKNpfa2r7A6 nG/ubLLCSrUCT8wz8tY5epiwyHJgmqHQ0fdVybj5LLkig18Wx+FARlZUjtjfo0x+aMjH HJVWT6VW+BwIjlCbA/a+cB2iqObYA2W1XN8eKeu8ij3qYLDlD3gZErfzTwVb9pV238yi DvbQMnzbK9zD0LZvUSLqAVjMc24Kq5GLtMj5XnDOKNjS/bhB8pT2HFppsb15cvRZKaqF /orAZBpBhKd8VxAE9NG1p99DSi16MfIDIv50G2TxRqe8bKWsvcfZ4/HsROews77n8ub9 rkYg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:dkim-signature; bh=0IHyllcFTLquqmW3lU8GUzF69Xv7K89ReeV8NDDRKj4=; b=ghY82XePKDipVOMxpQ4ubSt5+U7zIZyfInCXmCKogoDVHXZ4ZWqpGKUTvEAaGFwSE1 bzc2+U/HlBDQB4BjSlxMrlVHURYMmNqoeMbsSdr0U8s84O4Ak85sv/hFOnKbs3bavb8L 9SPcB6tbeI2AOFxWrgv5NPVFvWjRKrdDNFB9UEnuVCKlJv9I7fLG6os6FgmG8K2DWp2p /D/k9YKT1NhZUAxkkh7Y2m3iIRtbXgQotYYvQmn3zuvoTMxs1p35a/PECVZchepiwQ2b HqYEBa6HgUMnAX7HB8TD9D7MRmXzSO6YZb6MbHdP4A0zPDEuk0j41ueA71yebL4zOD+X yBrw== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=fF9P8PNh; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id c6si19789102pfc.235.2019.05.20.04.46.24; Mon, 20 May 2019 04:46:40 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=default header.b=fF9P8PNh; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732292AbfETLFL (ORCPT + 99 others); Mon, 20 May 2019 07:05:11 -0400 Received: from mail.kernel.org ([198.145.29.99]:58090 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732235AbfETLFL (ORCPT ); Mon, 20 May 2019 07:05:11 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 41B2A206B6; Mon, 20 May 2019 11:05:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1558350310; bh=VwQSMr5Rvx+iTC5OoVTUamKLhLW6uSee5o3V25yr4TY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=fF9P8PNhrc6oWUssYT1FD3oqgs7I5ECIp9YF3zNo77k9bLGVbFI+SbCOjbHjn9Syf zeb2/LeLpac4nqYDKzrZFfOByIPFnWqxIFvvn7A/RBJ1m8X1IJ67qBnOT2m3wJuWOn LA7yOl3IQbLmLAAdWusF0cdD9LkXYGrJmYLpogGo= Date: Mon, 20 May 2019 13:05:08 +0200 From: Greg Kroah-Hartman To: Matthew Wilcox Cc: Lech Perczak , Al Viro , Eric Dumazet , "linux-kernel@vger.kernel.org" , Piotr Figiel , Krzysztof =?utf-8?Q?Drobi=C5=84ski?= , Pawel Lenkow , "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: <20190520110508.GA20211@kroah.com> References: <14c9e6f4-3fb8-ca22-91cc-6970f1d52265@camlintechnologies.com> <011a16e4-6aff-104c-a19b-d2bd11caba99@camlintechnologies.com> <20190515144352.GC31704@bombadil.infradead.org> <20190515150406.GA22540@kroah.com> <20190515152035.GE31704@bombadil.infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190515152035.GE31704@bombadil.infradead.org> User-Agent: Mutt/1.11.4 (2019-03-13) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 15, 2019 at 08:20:35AM -0700, Matthew Wilcox wrote: > 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. Thanks, now queued up. greg k-h