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Message-ID: <20140721131154.GA23385@tango.0pointer.de> Date: Mon, 21 Jul 2014 15:11:54 +0200 From: Lennart Poettering <mzxreary@...inter.de> To: "Yue Zhang (OSTC DEV)" <yuezha@...rosoft.com> Cc: Tom Gundersen <teg@...m.no>, netdev <netdev@...r.kernel.org>, "driverdev-devel@...uxdriverproject.org" <driverdev-devel@...uxdriverproject.org>, LKML <linux-kernel@...r.kernel.org>, Greg KH <gregkh@...uxfoundation.org>, "olaf@...fle.de" <olaf@...fle.de>, "jasowang@...hat.com" <jasowang@...hat.com>, David Miller <davem@...emloft.net>, Haiyang Zhang <haiyangz@...rosoft.com>, KY Srinivasan <kys@...rosoft.com>, Thomas Shao <huishao@...rosoft.com>, Dexuan Cui <decui@...rosoft.com> Subject: Re: [PATCH] Hyperv: Trigger DHCP renew after host hibernation On Mon, 21.07.14 10:21, Yue Zhang (OSTC DEV) (yuezha@...rosoft.com) wrote: > Some network monitoring daemon, like ifplugd has a deferring mechanism. > When it detects carriers is offline, it doesn't trigger DHCP renew immediately. > Instead it will wait for another 5 seconds to check whether carrier is back to > online status. In that case, it will avoid renew DHCP lease. ifplugd doesn't renew DHCP leases anyway, one of the scripts it invokes does. ifplugd is obsolete software. I wrote it more than 10 years ago, and haven't really updated it since. it's sounds seriously wrong to add multi-second waits to the kernel just to make this crappy, obsolete software work. Please fix this properly, and work with the PM guys, so that we get a sane userspace how the kernel can notify userspace about suspends/hibernations triggered from the outside, so that userspace daemons can subscribe to that and then refresh the DHCP leases on their own. Lennart -- Lennart Poettering, Red Hat -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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