From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kay Sievers Subject: Re: Q: netdev: generate kobject uevent on network events. Date: Wed, 9 Dec 2009 19:46:26 +0100 Message-ID: References: <20091209170251.GA11650@sig21.net> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: Stephen Hemminger , netdev@vger.kernel.org, linux-hotplug@vger.kernel.org To: Johannes Stezenbach Return-path: In-Reply-To: <20091209170251.GA11650@sig21.net> Sender: linux-hotplug-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On Wed, Dec 9, 2009 at 18:02, Johannes Stezenbach wrote: > about a year ago you posted a patch which allows to manage > network hotplug via udev (or busybox mdev), which is useful > for low-end embedded platforms that don't want to run ifplugd. > > http://article.gmane.org/gmane.linux.hotplug.devel/13386 > > The patch still works with 2.6.32. =C2=A0Can it get merged or > were there any issues with it? =C2=A0It seems the discussion > just stopped and the patch was forgotten... Can't, in some setups, these events happen at a rather high frequency? I heard of people running many hundreds of ppp interfaces on a single box acting as a DSL concentrator. They state to already have trouble handling the amount of uevents generated on such boxes just for the "add/remove" events of all the interfaces if something goes wrong with the network. If we add more for state transitions, such events would probably need to be rate-limited. In general, uevents/udev are not really suitable for high-frequency events, and if such behavior can be expected, we might better stick with the current netlink interface. Thanks, Kay -- To unsubscribe from this list: send the line "unsubscribe linux-hotplug= " in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html