netdev - Re: 3.9.5+: Crash in tcp

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Date:	Mon, 08 Jul 2013 11:30:37 -0700
From:	Ben Greear <greearb@...delatech.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	netdev <netdev@...r.kernel.org>
Subject: Re: 3.9.5+:  Crash in tcp_input.c:4810.

On 07/08/2013 11:21 AM, Eric Dumazet wrote:
> On Mon, 2013-07-08 at 10:23 -0700, Ben Greear wrote:
>
>> We ran a 5+ day test using un-modified 3.10 kernel and did not trigger
>> the bug.
>
> Using wired ethernet only, or any kind of adapters, including ath9k ?

Exact same hardware and configuration:

ath9k, around 240 wifi
stations trying to connect to APs that can handle a bit less
than 240 total, starting TCP traffic when stations are connected.
It appears that the constant churn of stations going up and down
is key, but of course that is par for the course, especially in
the wifi stack.

Some of our local wifi patches make the system work considerably faster when
we have hundreds of wifi stations, so timing will be different on upstream
kernels, and of course we could have bugs :)

Thanks,
Ben

-- 
Ben Greear <greearb@...delatech.com>
Candela Technologies Inc  http://www.candelatech.com

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