linux-kernel - Re: Soft lockup issue in Linux 4.1.9

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Date:	Fri, 2 Oct 2015 09:17:16 +0200
From:	Holger Hoffstätte 
	<holger.hoffstaette@...glemail.com>
To:	Andre Tomt <andre@...t.net>, Eric Dumazet <edumazet@...gle.com>
Cc:	"David S. Miller" <davem@...emloft.net>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Stephen Hemminger <stephen@...workplumber.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	LKML <linux-kernel@...r.kernel.org>, stable@...r.kernel.org,
	netdev <netdev@...r.kernel.org>
Subject: Re: Soft lockup issue in Linux 4.1.9

On 10/02/15 08:52, Andre Tomt wrote:
> On 01. okt. 2015 13:52, Eric Dumazet wrote:
>> On Thu, Oct 1, 2015 at 4:43 AM, Holger Hoffstätte
>> <holger.hoffstaette@...glemail.com> wrote:
>>> On 10/01/15 13:29, Eric Dumazet wrote:
>>
>>>> commit 83fccfc3940c4a2db90fd7e7079f5b465cd8c6af
>>>> Author: Eric Dumazet <edumazet@...gle.com>
>>>> Date:   Thu Aug 13 15:44:51 2015 -0700
>>>>
>>>>      inet: fix potential deadlock in reqsk_queue_unlink()
> <snip>
>>> Whohoo! It applies/builds cleanly to 4.1.10-rc1 and is running as
>>> we speak. Let's hope that this fixes the lockups.
>>>
>>
>> It definitely should help !
>>
>> David, since patch is not yet seen on
>> http://patchwork.ozlabs.org/bundle/davem/stable/?state=*
>> could you please add it to your queue ?
> 
> Seems to fix it for me as well. 3 systems have been running varying
> types of production-like loads with it for 14+ hours without hanging.

Just got up, and yes - my systems survived the night as well, no issues.

Greg, any chance you can drop this into the pending 4.1.10? Otherwise people
will get another broken release.

cheers
Holger

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