linux-kernel - Re: [linux-next][bisected c64e09ce] sysctl command hung indefinitely

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Date:   Mon, 21 Aug 2017 21:57:31 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     Abdul Haleem <abdhalee@...ux.vnet.ibm.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-next <linux-next@...r.kernel.org>,
        sachinp <sachinp@...ux.vnet.ibm.com>,
        Joonsoo Kim <js1304@...il.com>
Subject: Re: [linux-next][bisected c64e09ce] sysctl command hung
 indefinitely

Hi Michal,

On Mon, 21 Aug 2017 09:50:01 +0200 Michal Hocko <mhocko@...nel.org> wrote:
>
> commit 69885605ee3ba681deb54021e3df645f46589ba1
> Author: Michal Hocko <mhocko@...e.com>
> Date:   Mon Aug 21 09:46:04 2017 +0200
> 
>     mmotm: mm-page_alloc-rip-out-zonelist_order_zone-fix
>     
>     Abdul has noticed that reading sysctl vm.numa_zonelist_order
>     read will never terminate. This is because of
>     http://lkml.kernel.org/r/20170714080006.7250-2-mhocko@kernel.org
>     where the reading side doesn't update ppos and so the reader will
>     never get 0. Return back to proc_dostring which does all the necessary
>     stuff.
>     
>     Reported-by: Abdul Haleem <abdhalee@...ux.vnet.ibm.com>
>     Signed-off-by: Michal Hocko <mhocko@...e.com>

I have added that to linux-next for tomorrow.

-- 
Cheers,
Stephen Rothwell