From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <owner-linux-mm@kvack.org>
Received: from mail-qt1-f198.google.com (mail-qt1-f198.google.com [209.85.160.198])
	by kanga.kvack.org (Postfix) with ESMTP id 2ABC68E0073
	for <linux-mm@kvack.org>; Thu, 24 Jan 2019 02:05:14 -0500 (EST)
Received: by mail-qt1-f198.google.com with SMTP id n39so5478708qtn.18
        for <linux-mm@kvack.org>; Wed, 23 Jan 2019 23:05:14 -0800 (PST)
Received: from mx1.redhat.com (mx1.redhat.com. [209.132.183.28])
        by mx.google.com with ESMTPS id k8si418537qvp.96.2019.01.23.23.05.13
        for <linux-mm@kvack.org>
        (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);
        Wed, 23 Jan 2019 23:05:13 -0800 (PST)
Date: Thu, 24 Jan 2019 15:05:03 +0800
From: Peter Xu <peterx@redhat.com>
Subject: Re: [PATCH RFC 04/24] mm: gup: allow VM_FAULT_RETRY for multiple
 times
Message-ID: <20190124070503.GJ18231@xz-x1>
References: <20190121075722.7945-1-peterx@redhat.com>
 <20190121075722.7945-5-peterx@redhat.com>
 <20190121162455.GC3711@redhat.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
Content-Transfer-Encoding: 8bit
In-Reply-To: <20190121162455.GC3711@redhat.com>
Sender: owner-linux-mm@kvack.org
List-ID: <linux-mm.kvack.org>
To: Jerome Glisse <jglisse@redhat.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Hugh Dickins <hughd@google.com>, Maya Gokhale <gokhale2@llnl.gov>, Johannes Weiner <hannes@cmpxchg.org>, Martin Cracauer <cracauer@cons.org>, Denis Plotnikov <dplotnikov@virtuozzo.com>, Shaohua Li <shli@fb.com>, Andrea Arcangeli <aarcange@redhat.com>, Mike Kravetz <mike.kravetz@oracle.com>, Marty McFadden <mcfadden8@llnl.gov>, Mike Rapoport <rppt@linux.vnet.ibm.com>, Mel Gorman <mgorman@suse.de>, "Kirill A . Shutemov" <kirill@shutemov.name>, "Dr . David Alan Gilbert" <dgilbert@redhat.com>

On Mon, Jan 21, 2019 at 11:24:55AM -0500, Jerome Glisse wrote:
> On Mon, Jan 21, 2019 at 03:57:02PM +0800, Peter Xu wrote:
> > This is the gup counterpart of the change that allows the VM_FAULT_RETRY
> > to happen for more than once.
> > 
> > Signed-off-by: Peter Xu <peterx@redhat.com>
> 
> So it would be nice to add a comment in the code and in the commit message
> about possible fault starvation (mostly due to previous patch changes) as
> if some one experience that and try to bisect it might overlook the commit.
> 
> Otherwise:
> 
> Reviewed-by: Jérôme Glisse <jglisse@redhat.com>

Jerome, can I still keep this r-b if I'm going to fix the starvation
issue you mentioned in previous patch about lock page?

Regards,

-- 
Peter Xu