linux-kernel - Re: [PATCH 4.4 164/190] futex: Remove requirement for lock_page() in get_futex

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Message-ID: <1526481745.9159.128.camel@codethink.co.uk>
Date:   Wed, 16 May 2018 15:42:25 +0100
From:   Ben Hutchings <ben.hutchings@...ethink.co.uk>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org
Cc:     stable@...r.kernel.org, Mel Gorman <mgorman@...e.de>,
        Davidlohr Bueso <dbueso@...e.de>,
        Thomas Gleixner <tglx@...utronix.de>, Chris Mason <clm@...com>,
        Darren Hart <dvhart@...ux.intel.com>,
        Hugh Dickins <hughd@...gle.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Peter Zijlstra <peterz@...radead.org>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        dave@...olabs.net, Ingo Molnar <mingo@...nel.org>,
        Chenbo Feng <fengc@...gle.com>
Subject: Re: [PATCH 4.4 164/190] futex: Remove requirement for lock_page()
 in get_futex_key()

On Wed, 2018-05-16 at 15:38 +0100, Ben Hutchings wrote:
> On Wed, 2018-04-11 at 20:36 +0200, Greg Kroah-Hartman wrote:
> > 4.4-stable review patch.  If anyone has any objections, please let me know.
> > 
> > ------------------
> > 
> > From: Mel Gorman <mgorman@...e.de>
> > 
> > commit 65d8fc777f6dcfee12785c057a6b57f679641c90 upstream.
> 
> [...]
> 
> This causes regressions, fixed upstream by:
> 
> commit 077fa7aed17de5022e44bf07dbaf732078b7b5b2
> Author: Mel Gorman <mgorman@...e.de>
> Date:   Wed Jun 8 14:25:22 2016 +0100
> 
>     futex: Calculate the futex key based on a tail page for file-based futexes

Actually I think this backport to 4.4 incorporated the fix above, but
the one below still looks applicable.

Ben.

> commit 48fb6f4db940e92cfb16cd878cddd59ea6120d06
> Author: Mel Gorman <mgorman@...e.de>
> Date:   Wed Aug 9 08:27:11 2017 +0100
> 
>     futex: Remove unnecessary warning from get_futex_key
> 
> Ben.
> 
-- 
Ben Hutchings
Software Developer, Codethink Ltd.