Hi Akemi, On Thu, Oct 2, 2008 at 13:04, Akemi Yagi <amyagi@xxxxxxxxx> wrote: > Because we do not include the vanilla kernel and > are staying withing the CentOS distro kernel in that wiki > instructions, I'm not sure whether we should refer to the cplus > kernel. It is a great product offered by Mr. Hughes, but it is a > custom kernel per se. But if you feel adding notes that pertain to > the cplus kernel makes the wiki article a better one, I would be > willing to do it. Actually, as you can probably see in my recent post to the CentOS list, I had to create a custom kernel to support a specific hardware that I had. I also needed XFS, that's why I did it over the CentOS Plus kernel. It was not that hard to do it based on the original instructions, but there are some differences. For example, the snippet that starts at line 4779, the one that starts with "#if a rhel kernel, apply the rhel config options", that one is not present at all on the CentOS kernel, but I just went ahead and it worked fine. At the end, although in some places I had to make a choice on whether I followed the instructions for the default kernel or not, I could successfully build it and it worked, and it was not too hard (took me just 2 or 3 hours to do it). What I think would be really great would be an explanation of why the items in section "3. Modifying the kernel spec file" have to be done, because knowing what does each of them do and why they have to be commented would have helped me in choosing what I should and what I should not do. Of course, that page by itself is a great guide, and including lots of explanations of why this and why that would probably be a lot of clutter there, but maybe a separate page with the rationale would be very useful, especially when new kernels are available (CentOS 6?) and the page will no longer work in terms of following literal instructions. Another thing that bit me yesterday is that I used a "buildid" for my kernel, and then I could no longer load the XFS filesystem. I had to rebuild the xfs-kmod RPM as well, in that case I had to use a special rpmbuild command line so that it compiled it only for my arch, only for the default kernel (not xen, etc.) and for that specific buildid. I don't recall exactly which command line I used, and my build host was reinstalled soon after that, but if you wish I could try to reproduce that environment again in another machine to get it right and post it here. Thanks a lot! The documentation looked great already, it looks even better now!!! :-D Filipe
