linux-kernel - Re: [criu] 1M guard page ruined restore

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Date:   Wed, 21 Jun 2017 19:16:02 +0200
From:   Willy Tarreau <w@....eu>
To:     Oleg Nesterov <oleg@...hat.com>
Cc:     Cyrill Gorcunov <gorcunov@...il.com>,
        Hugh Dickins <hughd@...gle.com>,
        Andrey Vagin <avagin@...nvz.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Pavel Emelyanov <xemul@...tuozzo.com>,
        Dmitry Safonov <dsafonov@...tuozzo.com>,
        Andrew Morton <akpm@...uxfoundation.org>,
        Adrian Reber <areber@...hat.com>
Subject: Re: [criu] 1M guard page ruined restore

Hi Oleg,

On Wed, Jun 21, 2017 at 07:01:29PM +0200, Oleg Nesterov wrote:
> Ah. I forgot about another kernel "feature" ;) not related to the recent guard
> page changes...
> 
> Could you test the patch below?

FWIW, I've just checked here on 3.10.107-rc and while I observe the same
regression as Cyrill with his reproducer, I can confirm that your patch
fixes it on this kernel.

Willy