netdev - Re: [RFC] net: ipv4 -- Introduce ifa limit per net

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Message-ID: <1457281392.2663.5.camel@edumazet-ThinkPad-T530>
Date:	Sun, 06 Mar 2016 08:23:12 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Cyrill Gorcunov <gorcunov@...il.com>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	solar@...nwall.com, vvs@...tuozzo.com, avagin@...tuozzo.com,
	xemul@...tuozzo.com, vdavydov@...tuozzo.com, khorenko@...tuozzo.com
Subject: Re: [RFC] net: ipv4 -- Introduce ifa limit per net

On dim., 2016-03-06 at 13:09 +0300, Cyrill Gorcunov wrote:

> Anyway, then I run this script for 255 as parameter
> in one pass which gen. requests to create 65025 addresses
> and kernel start complaining:
> 
> Perf output
> -----------
>   24.95%  [kernel]                      [k] __local_bh_enable_ip
>   21.52%  [kernel]                      [k] lock_acquire
>   15.54%  [kernel]                      [k] lock_release
>    9.84%  [kernel]                      [k] lock_is_held
>    7.47%  [kernel]                      [k] lock_acquired
>    4.08%  [kernel]                      [k] __local_bh_disable_ip

Well, this looks like LOCKDEP kernel. Are you really running LOCKDEP on
production kernels ?