> >It seems that it initially finds the root on the nfs box but it > >never get to do an init. It just stops and waits... Do I need > >to modify any setting manually on my NFS image in order for the > >kernel to boot? > > I had something like that happen to me. It'd start mounting the > NFS root but would stop sending packets after a while. I thought > it was the ethernet driver but I never did find the problem > before I had to move to other projects. I also saw a similar problem when booting the kernel with a ramdisk and attempting to NFS mount from there via a wireless card. I don't even remember which kernel it was now, but I eventually concluded that the issue was with fragmented UDP packets. Linux has NFS_DEF_FILE_IO_BUFFER_SIZE set to 4096, which is of course larger than an Ethernet frame (1536) and must fragment. I'm not sure if it that was the fault with the kernel or the wireless access point I was using, but my host would send all fragments, and the MIPS box would eventually send back a reassembly timeout. Anyway, my solution was: mount -o rsize=1024,wsize=1024 ... I presume you could also set those from the boot command line if you need to use nfsroot. (The symptoms were that I could mount, and a very small number of operations would occasionally work. Of course, the ones that worked were just whatever ones happened to fit in an unfragmented UDP packet) -jim
