Re: [RFT PATCH] Delay netroot mounting by 1 second

[Seewer Philippe <philippe.seewer-omB+W0Dpw2o@public.gmane.org>]

Bill Nottingham wrote:
> Seewer Philippe (philippe.seewer-omB+W0Dpw2o@public.gmane.org) said: 
>> While testing in our production environment, I discovered
>> that the time between interface configuration and trying to mount the nfs 
>> root is too short if the dhcp-server provides an mtu. Having to set a mtu 
>> means that netroot
>> executes 'ip link down', set's the mtu and the does
>> 'ip link up' again.
>>
>> This results in the mount error "No route to host", because
>> the network equipment has not had enough time to "shake hands". The patch 
>> below adds a sleep 1 after interface configuration, to give the equipment 
>> enough time.
> 
> Depending on your switch configuration, the time for the switch to start
> passing traffic again on link bounce couuld be anywhere from 0.1 seconds
> to 20 seconds...

Quite correct. Up until now I've fared well with adding 1-5 second 
sleeps to my stuff. But yes it could even take longer. Any ideas how to 
solve this better?

Regards,
Philippe
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