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On Sunday 04 December 2005 23:22, Greg KH wrote: > On Sun, Dec 04, 2005 at 04:46:31AM +0000, Luke-Jr wrote: > > Well, devfs does have some abilities udev doesn't: hotplug/udev > > doesn't detect everything, and can result in rarer or non-PnP devices > > not being automatically available; > > Are you sure about that today? Nope, but I don't see how udev can possibly detect something that doesn't let the OS know it's there-- except, of course, loading the driver for it and seeing if it works. > And udev wasn't created to do everything that devfs does. Which might be a case for leaving devfs in. *shrug* > And devfs can't do everything that udev can (by far...) Didn't say it could... > > Interesting effects of switching my desktop from devfs to udev: > > 1. my DVD burners are left uninitialized until I manually modprobe ide-cd > > or (more recently) ide-scsi > > Sounds like a broken distro configuration :) Well, I was assuming you kept Gentoo's udev packages up to date. ;) [ebuild R ] sys-fs/udev-070-r1 (-selinux) -static 429 kB > > devfs also has the advantage of keeping the module info all in one > > place-- the kernel or the module. > > In particular, with udev the detection and /dev info is scattered into > > different locations of the filesystem. This can probably be fixed > > easily simply by having udev read such info from modules or via a /sys > > entry, though. > > What information are you talking about here? I'm assuming everything in /etc/udev/rules.d/50-udev.rules used to be in the kernel for devfs-- perhaps it was PAM though, I'm not sure. Other than that, I don't expect that simply installing a new kernel module will allow the device to be detected automatically, but that some hotplug or udev configurations will need to be updated also. -- Luke-Jr Developer, Utopios http://utopios.org/ - 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/ | ||||||||||
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