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Date: Fri, 11 Oct 2013 16:57:01 +0800
From: Fengguang Wu <fengguang.wu@intel.com>
Subject: Re: [uml-devel] BUG: soft lockup for a user mode linux image
Message-ID: <20131011085701.GA27382@localhost>
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To: Toralf =?utf-8?Q?F=C3=B6rster?= <toralf.foerster@gmx.de>
Cc: Richard Weinberger <richard@nod.at>, Jan Kara <jack@suse.cz>, Geert Uytterhoeven <geert@linux-m68k.org>, UML devel <user-mode-linux-devel@lists.sourceforge.net>, "linux-mm@kvack.org" <linux-mm@kvack.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "akpm@linux-foundation.org" <akpm@linux-foundation.org>, hannes@cmpxchg.org, darrick.wong@oracle.com, Michal Hocko <mhocko@suse.cz>

On Fri, Oct 11, 2013 at 10:42:19AM +0200, Toralf FA?rster wrote:
> yeah, now the picture becomes more clear
> ...
> net.core.warnings = 0                                                                         [ ok ]
> ick: pause : -717
>                  ick : min_pause : -177
>                                    ick : max_pause : -717
>                                                      ick: pages_dirtied : 14
>                                                                             ick: task_ratelimit: 0

Great and thanks! So it's the max pause calculation went wrong.
Would help you try the below patch?