From linux-kernel Thu May 07 02:40:29 2009 From: Kay Sievers Date: Thu, 07 May 2009 02:40:29 +0000 To: linux-kernel Subject: Re: [PATCH] driver-core: devtmpfs - driver core maintained /dev tmpfs Message-Id: X-MARC-Message: https://marc.info/?l=linux-kernel&m=124166408907194 On Thu, May 7, 2009 at 04:25, Arjan van de Ven wrote: > On Thu, 7 May 2009 04:08:33 +0200 > Kay Sievers wrote: >> >> How will you solve the dynamic device numbers? They are a complete >> reality today. > > not for storage though... Oh sure: cat /sys/class/block/sd*/dev 259:524288 259:262144 259:786432 259:131072 259:0 259:393216 259:655360 That's the box I write this from. It's experimental now but in the upstream kernel. Distros want to support more than 15 partitions, so that will happen sooner than later. And you may talk to the wrong rtc device, if you use static nodes, and so on. There are just too many things that can go wrong, and distros that don't have a very limited set of hardware, can not take the risk of a static /dev. They don't have this today, and will not go back to it. That's why we are coming up with this. > and for the rest udev is fast enough in > practice.... Sure, but you still have the transition to the tmpfs /dev, and during that you are very limited in what you can do, and this addresses devtmpfs. Thanks, Kay -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/