netdev - RE: [PATCH] Hyperv: Trigger DHCP renew after host hibernation

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Date:	Mon, 11 Aug 2014 03:29:51 +0000
From:	Dexuan Cui <decui@...rosoft.com>
To:	Greg KH <gregkh@...uxfoundation.org>
CC:	"olaf@...fle.de" <olaf@...fle.de>,
	Richard Weinberger <richard.weinberger@...il.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"jasowang@...hat.com" <jasowang@...hat.com>,
	"driverdev-devel@...uxdriverproject.org" 
	<driverdev-devel@...uxdriverproject.org>,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Shao <huishao@...rosoft.com>,
	"Yue Zhang (OSTC DEV)" <yuezha@...rosoft.com>,
	"David Miller" <davem@...emloft.net>,
	Stephen Hemminger <stephen@...workplumber.org>
Subject: RE: [PATCH] Hyperv: Trigger DHCP renew after host hibernation

> -----Original Message-----
> From: Dexuan Cui
> Sent: Monday, August 11, 2014 11:24 AM
> Now I understand it's not good to pass the event to the udev daemon,
> and it's not good to use a SLEEP(10s) in the kernel space(even if it's in a
> "work" task here).
> 
> Please let me know if it's the correct direction to fix the user-space
> daemons (ifplugd, systemd-networkd, etc).
> If you think this is viable and we should do this, I'll submit a
> netif_carrier_off/on patch first and will start to work with the
> projects of ifplugd, systemd-networkd and many OSVs to make the
> while thing work eventually.

I forgot to mention: due to the huge efforts to fix the user-space
daemons, I wish the "tearing down the net device and re-creating it"
method could work with the daemons -- I'm going to try it.

Anybody objects to this method?

Thanks,
-- Dexuan
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