linux-kernel - RE: A small window for a race condition in mm/rmap.c:page_lock_anon_vma

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Message-ID: <23B7B563BA4E9446B962B142C86EF24ADBFD2D@CNMAILEX03.lenovo.com>
Date:   Sun, 25 Dec 2016 02:22:31 +0000
From:   Dashi DS1 Cao <caods1@...ovo.com>
To:     Peter Zijlstra <peterz@...radead.org>
CC:     Hugh Dickins <hughd@...gle.com>, Michal Hocko <mhocko@...nel.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: A small window for a race condition in
 mm/rmap.c:page_lock_anon_vma_read

It's a CentOS 7.2, so there is point in asking RHT. I'll try to persuade the customer to have a try with kernel version 4.9, if only I can get it work with CentOS 7.2.

Dashi Cao

-----Original Message-----
From: Peter Zijlstra [mailto:peterz@...radead.org] 
Sent: Friday, December 23, 2016 10:20 PM
To: Dashi DS1 Cao <caods1@...ovo.com>
Cc: Hugh Dickins <hughd@...gle.com>; Michal Hocko <mhocko@...nel.org>; linux-mm@...ck.org; linux-kernel@...r.kernel.org
Subject: Re: A small window for a race condition in mm/rmap.c:page_lock_anon_vma_read

On Fri, Dec 23, 2016 at 02:02:14AM +0000, Dashi DS1 Cao wrote:
> The kernel version is "RELEASE: 3.10.0-327.36.3.el7.x86_64". It was the latest kernel release of CentOS 7.2 at that time, or maybe still now.

This would be the point where we ask you to run a recent upstream kernel and try and reproduce the problem with that, or contact RHT for support on their franken-kernel ;-)