netdev - Re: [PATCH] tcp: fix ICMP-RTO war

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Message-id: <4B6356FF.7070504@tvk.rwth-aachen.de>
Date:	Fri, 29 Jan 2010 22:45:35 +0100
From:	Damian Lukowski <damian@....rwth-aachen.de>
To:	Denys Fedoryshchenko <denys@...p.net.lb>
Cc:	Ilpo Järvinen <ilpo.jarvinen@...sinki.fi>,
	Netdev <netdev@...r.kernel.org>,
	David Miller <davem@...emloft.net>
Subject: Re: [PATCH] tcp: fix ICMP-RTO war

Denys Fedoryshchenko schrieb:
> On Friday 29 January 2010 14:13:18 Damian Lukowski wrote:
>> Denys Fedoryshchenko schrieb:
>>> On Wednesday 27 January 2010 14:36:18 you wrote:
>>>> Unless they are for a different connection? We might have to print sk
>>>> (%p) in all those printouts to be sure which maps to which. If a peer
>>>> becomes unreachable, it may well have multiple connections open (this
>>>> was a proxy, iirc?).
>>> Ok i will try to do that today.
>>>
>>> Most probably different connections, on this proxy i have 10-15k
>>> established connections at peak time.
> http://www.nuclearcat.com/files/report1.txt
> http://www.nuclearcat.com/files/report2.txt
> 
> Here with %p and sk.

Ok, thanks for testing.
So it is ec0f3440 causing the trouble. Are there still objections
on the lower bound check in __tcp_set_rto()? Well, I will submit
an updated patch and you can make comments there.

Regards
 Damian
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