Date: Tue, 25 Jul 2006 10:53:31 -0700 (PDT) From: Shane Adams <adamsch1@yahoo.com> To: Eric Anderson <anderson@centtech.com>, =?utf-8?q?Dag-Erling=20Sm=C3=B8rgrav?= <des@des.no> Cc: freebsd-fs@freebsd.org Subject: Re: Advice for hacking on ufs/ffs Message-ID: <20060725175331.78302.qmail@web31806.mail.mud.yahoo.com> In-Reply-To: <44C6430D.1050506@centtech.com>
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Thanks for the tip DES! I will probably break down and buy a cheap machine= or dust off my old P3 box. I have a PXE card at home too. I want to try = qemu as well cause if I get it to work I can tool around on my laptop. Eric, I hate to bother you but I didn't get the cheat sheet. Here's what I= attempted last night. I built qemu from ports I used dd to create 1G file. I did mdconfig -a -t vnode -f /bigdrive/bsdfilesystem -u 0 I downloaded the 20M boot only ISO. I ran qemu specifying -cdrom as the 20M iso, and -hda to /bigdrive/bsdfiles= ystem. Qemu started fine, and I proceeded to go through the basic install process,= at that point it asked me to toss in the correct CD with the packages to c= omplete the installation (Which I didnt' have the CD handy and it was late = so I will try again tonight). Anyway - you said you do a make DESTDIR to your mdconfig'd file. Did you m= ount the file you mdconfiged? If so, does a make installworld install a bo= ot loader as well? I'm not clear on how you used qemu to boot agains that = device. Perhaps you did a normal BSD install on it then later mounted it t= o get your stuff on there? Cheers, Shane ----- Original Message ---- From: Eric Anderson <anderson@centtech.com> To: Dag-Erling Sm=C3=B8rgrav <des@des.no> Cc: Shane Adams <adamsch1@yahoo.com>; freebsd-fs@freebsd.org Sent: Tuesday, July 25, 2006 9:13:01 AM Subject: Re: Advice for hacking on ufs/ffs On 07/25/06 10:13, Dag-Erling Sm=C3=B8rgrav wrote: > Shane Adams <adamsch1@yahoo.com> writes: >> I'm a programmer that is new to kernel development. I'm interested >> in hacking around on UFS and FFS. I only have one machine so I >> copied the complete sys/ufs code to a new directory under fs, and >> changed a few things to get it to compile and mount. Everything >> works, and I was ready to start hacking without worrying so much >> about screwing up my system. >> >> Naturally I've rebooted the machine a few times since then, and I >> was wondering if anyone has advice for a fledgling kernel >> programmer. (Best practices) >=20 > Get a test machine with a PXE-capable network adapter, and set up your > workstation as bootp / dhcp and NFS server. Having a dedicated test > box will save time as you won't have to reboot your workstation to > test your code, and setting it up diskless will help even further. A > serial console cable will help even more, as it will save you from > moving from one keyboard to another and will give you a scrollback of > the test machine's console from which you can copy / paste error > messages, backtraces etc. >=20 > DES DES - anything special with the nfs root'ed box, to make this work well?=20 The only reason I didn't set this up for my work is because it isn't=20 portable.. :) Eric --=20 ------------------------------------------------------------------------ Eric Anderson Sr. Systems Administrator Centaur Technology Anything that works is better than anything that doesn't. ------------------------------------------------------------------------
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