Re: [PATCH net-next] hv_netvsc: Increase delay for RNDIS_STATUS_NETWORK_CHANGE

[David Miller]

From: Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>
Date: Tue, 9 Feb 2016 15:31:34 +0000

> 1) I share your concern as well. Is there a universal way to immediately trigger 
> DHCP renew of all current and future daemons with a single event from kernel? 
> If not, can we put the delay (RNDIS_STATUS_NETWORK_CHANGE only) into a 
> tunable variable of this driver?
> 
> 2) We used to have the call_usermodehelper "/etc/init.d/network restart" to 
> trigger DHCP renew. In commit 27a70af3f4, Vitaly has replaced it with the current 
> code that updates the link status with at least 2 seconds interval, so that the 
> "link_watch infrastructure" can send notification out. link_watch infrastructure 
> only sends one notification per second.

If the daemon is waiting for the link state change properly, there should be
no delay necessary at all.