l4-hackers September 1999

l4-hackers@os.inf.tu-dresden.de

5 participants
5 discussions

Re: Compiling Fiasco (PR#39)
by Michael Hohmuth 09 Sep '99

09 Sep '99

I wrote earlier: > David Waite <mass(a)ufl.edu> writes: > > > I have been having problems compiling Fiasco from the CVS drop I got about > > four days ago. The OSKit seems to be having problems with both the 'depend' > > files (they are actually getting some ELF binary tacked on to the end, > > although I haven't investigated why yet). Also, the gcc v2.95 has a problem > > with the assembly (reports invalid register use in the what looked to be > &… [View More]

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Re: GRUB network boot
by vhandel＠chem.vu.nl 02 Sep '99

02 Sep '99

>Are there instructions anywhere for how to do a network boot with >GRUB? I think there is code for it in Dresden's version of GRUB, but >not in GNU's GRUB, yet. I've just spent a few days integrating Dresden's netboot stuff into my heavily hacked version of GRUB, so I do have an idea how this works ;). The network device is called (nd). So your GRUB config could contain an entry like this: title= Netboot Linux root= (nd) kernel= /boot/vmlinuz [nfsroot options] or something … [View More]similar :) Network boot works through TFTP/BOOTP. A linux HOWTO that helped me on the way is the Diskless mini-howto. You need to setup the bootp daemon on your server using a bootp configuration table, usually in /etc/bootptab. Read the diskless mini-howto and do man bootp to figure out how this works (do I need to post an example ?). Then, edit /etc/inetd.conf and uncomment the lines that look something like this: tftp dgram udp wait nobody /usr/sbin/tcpd in.tftpd bootps dgram udp wait root /usr/sbin/in.bootpd in.bootpd Pitfall: don't forget to give tftpd the directory in which your netboot files are as a parameter. You will still need to supply the complete path of that dir in GRUB (the howto's are a bit misleading, they talk about changing the root dir and stuff like that) but otherwise you would have to supply a relative path, which GRUB does not support. Now you should be ready to netboot ! PS, I have heard from people that sometimes the linux bootp daemon doesn't work. In that case you can try running the dhcp daemon with bootp support. PPS, I think there's another pitfall -- I haven't been keeping track of the development of Dresden's GRUB, but if it's similar to the version that I have at home them it's based on an old version of GRUB, which *does not compile correctly with the new gas* !!!!!! If you recompile it on an up-to-date system, GRUB'll crash on boot. So beware. This same problem occurs with the GRUB dist from uruk.org... GNU GRUB fixes this. >This one is even more off-topic, but I'll just mention it quickly: I >tried last night to install GRUB on an 8.4 GB disc. I know you always >used to have to make sure that stage2 is in the first 540 MB of the >disc, but I naively assumed that, since this was modern hardware and >the latest version of GRUB, and the BIOS was set to LBA mode, I would >be all right. But it didn't work (something like "Disc geometry >error"). Do the old restrictions still apply, then? Was it GNU GRUB ? The last time I tried GNU GRUB (a month ago or so) LBA mode didn't work for me... while I have a mere 520MB disk, for which the BIOS DOES support LBA !!!!! On some partitions I got all kinds of weird geo errors, on others I got corrupted partition information and stuff like that. I was going to try to debug it but never actually got around to it... Ramon [View Less]

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Re: Chief number in TID's
by Michael Hohmuth 02 Sep '99

02 Sep '99

Marcus, I think there is a misunderstanding here -- Adam's question was why is the number of the chief task a part of the thread-id data structure (l4_threadid_t). As it would be beneficial to move from 64-bit thread ids to 32-bit thread ids on 32-bit architectures like x86 and StrongARM, Adam is looking for ways to reduce the size of the thread-id data structure, and one way to do so would be to throw out the chief number. Personally, I don't think there is a real reason to keep the chief … [View More]

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GRUB network boot
by Edmund GRIMLEY EVANS 02 Sep '99

02 Sep '99

Are there instructions anywhere for how to do a network boot with GRUB? I think there is code for it in Dresden's version of GRUB, but not in GNU's GRUB, yet. This one is even more off-topic, but I'll just mention it quickly: I tried last night to install GRUB on an 8.4 GB disc. I know you always used to have to make sure that stage2 is in the first 540 MB of the disc, but I naively assumed that, since this was modern hardware and the latest version of GRUB, and the BIOS was set to LBA mode, I … [View More]

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Chief number in TID's
by Adam 'WeirdArms' Wiggins 02 Sep '99

02 Sep '99

Does anyone have a 'good' reason for the chief number to be an a TID for the use of users (nothing to do with kernel internals and implimentation). Removing the chief from the TID allows 32bit TID's with a 'reasonable' number of tasks and threads per task. :) Cheers Adam

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l4-hackers September 1999