netdev - Re: [net-next-2.6 PATCH] net: fast consecutive name allocation

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Message-ID: <4AFED7EE.2000209@candelatech.com>
Date:	Sat, 14 Nov 2009 08:16:46 -0800
From:	Ben Greear <greearb@...delatech.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	Benny Amorsen <benny+usenet@...rsen.dk>,
	Stephen Hemminger <shemminger@...tta.com>,
	Benjamin LaHaise <bcrl@...et.ca>,
	Octavian Purdila <opurdila@...acom.com>, netdev@...r.kernel.org
Subject: Re: [net-next-2.6 PATCH] net: fast consecutive name allocation

Eric Dumazet wrote:
> Benny Amorsen a écrit :
>   
>> Stephen Hemminger <shemminger@...tta.com> writes:
>>
>>     
>>> Then maybe network devices aren't the right layering model. At some
>>> point the paradigm has to be re-examined.
>>>       
>> I'm not quite sure where this becomes a problem. We have 1185 network
>> interfaces (VLAN's) on one box. Boot time is a problem, but other than
>> that it works ok. If something like this would help speed up booting,
>> that would be very nice.
>>
>>     
>
> It would be very nice if you tell us why booting is very long,
> ie what is done and how much time it takes.
>
> It's clear that ~1000 vlans is quite reasonable :)
>   
At least sometimes, hotplug can degrade into a nasty case where it runs 
'ifconfig -a' for each
interface created.   (This was F11 if I recall correctly).

If you configure hotplug to ignore vlans, it might help your boot time.

Thanks,
Ben

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


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