"Martin" == Martin Krause Martin.Krause@tqs.de writes:
Martin> I tried this with a read-only ext2 root file system on a Martin> linux partition on an USB memory stick some time ago - and Martin> failed. I hadn't much time to analyze what's going wrong but Martin> I think the problem was that the kernel (linuxppc_2_4_devel Martin> from denx) tried to mount the root file system _before_ Martin> initializing of the usb sub system has completed. At least Martin> the console messages looked so - but perhaps I missed Martin> something.
Martin> Has anybody else tried this? I would be happy to hear about a Martin> successful way to do this.
Yes, there's a race condition between the kernel mounting the rootfs and USB detection / partition scan - I have solved it with a small initrd (~100k) which sits in a loop trying to mount the USB stick and then does a pivot_root to it.