On Friday 20 July 2007 8:43:49 pm Greg KH wrote: > On Fri, Jul 20, 2007 at 08:21:39PM -0400, Rob Landley wrote: > > Ok, back up. /sys/devices does not contain all the information necessary > > to populate /dev, because it hasn't got things like > > ramdisks, /dev/zero, /dev/console which are THERE in sysfs, which may or > > may not be supported by the kernel (the kernel might have ramdisk > > support, might not). > > Welcome to 2007: > > $ ls /sys/devices/virtual/mem/ > full kmem kmsg mem null port random urandom zero > $ ls /sys/devices/virtual/tty/ > console tty12 tty19 tty25 tty31 tty38 tty44 tty50 tty57 tty63 > ptmx tty13 tty2 tty26 tty32 tty39 tty45 tty51 tty58 tty7 > tty tty14 tty20 tty27 tty33 tty4 tty46 tty52 tty59 tty8 > tty0 tty15 tty21 tty28 tty34 tty40 tty47 tty53 tty6 tty9 > tty1 tty16 tty22 tty29 tty35 tty41 tty48 tty54 tty60 > tty10 tty17 tty23 tty3 tty36 tty42 tty49 tty55 tty61 > tty11 tty18 tty24 tty30 tty37 tty43 tty5 tty56 tty62 > > I suggest you take a close look at the kernel before making statements > like the above :)
I did: [EMAIL PROTECTED]:/sys/devices$ ls /sys/devices/virtual ls: /sys/devices/virtual: No such file or directory [EMAIL PROTECTED]:/sys/devices$ cat /proc/version Linux version 2.6.20-16-generic ([EMAIL PROTECTED]) (gcc version 4.1.2 (Ubuntu 4.1.2-0ubuntu4)) #2 SMP Thu Jun 7 20:19:32 UTC 2007 I.E. Ubuntu 7.04, stock. The most recent release, using a 2.6.20 kernel. I see that what you're talking about is in 2.6.22. Back when I started writing my document in May, I forgot to check 2.6.22. > > These things could also, in future, have their major and minor numbers > > dynamically (even randomly) assigned. That's been discussed on this > > list. > > I tried that once, it will require some core api kernel changes and a > lot of infrastrucure work to get that to work properly. Not that it > will never happen in the future, but it's just not a trivial change at > the moment... Understood. > thanks, > > greg k-h Rob -- "One of my most productive days was throwing away 1000 lines of code." - Ken Thompson. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
