From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kay Sievers Date: Sun, 13 Feb 2005 14:15:25 +0000 Subject: udev PROGRAM key and the device chain walk Message-Id: <20050213141525.GA22956@vrfy.org> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-hotplug@vger.kernel.org While we try to match rule keys against a devices sysfs representaion, we need to follow the physical device and walk up the device chain up to the root device and match our rule against every device found. While this is necessary to match the SYSFS and BUS keys, it has the _very_ bad side effect, that a PROGRAM may be executed several times. In my test setup, I've seen five executions of a callout to match one single rule. The only reason to do this, is the match with a callout against a sysfs attribute of one of the physical devices along the chain by using the %s{} key. I don't think that this is really needed and I want to change the namedev logic to execute the PROGRAM key only once per rule. It will be still possible to pass the %s{} to the callout, but it will only happen at the device itself and not follow the chain to the root device. If such a thing is ever needed, the callout can do it itself and not rely on udev to execute it several times. Any objections, or I will change that to speed things up. Thanks, Kay ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_ide95&alloc_id396&op=click _______________________________________________ Linux-hotplug-devel mailing list http://linux-hotplug.sourceforge.net Linux-hotplug-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel