Am using Fedora 4 kernel 2.6.16.13 and kernel panics when I try to boot from rebuilt kernel The error msg is device-mapper missing from kernel? How do I fix this problem --- Ashok Sharma <aks6d@xxxxxxxxxxx> wrote: > > I am getting the Msg device mapper missing from > kernel > > How do I fix this problem > > Ashok > > > > > > --- rohit hooda <rohit13hooda@xxxxxxxxxxxxxx> > wrote: > > > > > > > > > On Tue, 09 May 2006 Jesper Juhl wrote : > > >On 5/8/06, Arjan van de Ven <arjan@xxxxxxxxxxxxx> > > wrote: > > >>On Mon, 2006-05-08 at 08:25 -0300, Jeronimo > Zucco > > wrote: > > >> > Arjan van de Ven wrote: > > >> > >> May be this is caused by UDEV support. > > >> > > > > >> > > > > >> > > usually when this happens you forgot to use > > an initrd. > > >> > > The easiest way to do that is to just do > > "make install" as last step in > > >> > > building the kernel, that makes an initrd > for > > you and also adds the > > >> > > kernel and initrd correctly to grub.conf > > >> > > > >> > And if you not want use initrd ? > > >> > > >>why don't you? Can you explain what you have > > against using an initrd? > > >> > > > > > >I don't know what Jeronimo has against initrd's, > > but I can tell you > > >what I have against them. > > > > > >An initrd complicates things. > > >It's one more thing to remember to build. > > >It's one more thing that can potentially break. > > > > > >If you just build into the kernel whatever you > need > > to get to the > > >point of mounting the root fs (or want to have > > available early) and > > >then anything else you need as modules, then an > > initrd is pretty > > >pointless, and it's a much more simple setup IMO. > > > > > >>Fedora requires an initrd for several parts; > udev > > is one of them, > > >>mount-by-label another, selinux a third. > > >> > > >I'm not a Fedora user, so I don't know what > initrd > > assumptions are > > >build into it, but I've never had a need for an > > initrd with Slackware > > >- I can build an use one if I want, sure, but it > > has never been a > > >requirement in any way. > > > > > > > > >>It's not like using an initrd has drawbacks that > I > > know of, nor is it > > >>hard; if you use "make install" it's automatic > as > > I said, and that's a > > >>convenient thing to use anyway (because it does > > the bootloader stuff for > > >>you) > > > > > >Personally I consider "make install" dangerous. > > > > > >First of all it assumes that I want my kernel to > be > > named > > >/boot/vmlinuz and happily overwrites any previous > > kernel image that > > >may exist by that name. So if my new kernel > doesn't > > boot, and I only > > >have that one entry in my lilo.conf, then I'm in > > trouble and have to > > >go find a CD to boot from to recover. > > > > > my friend this is not the case. In Fedora, the > > vmlinuz get appended with the version number of > the > > kernel as well to let you distinguish from the > other > > kernel images in /boot directory. You can specify > > this version in the Makefile in the > > /usr/src/linux-2.6.xx path. > > " > > VERSION = 2 > > PATCHLEVEL = 6 > > SUBLEVEL = 12 > > EXTRAVERSION = > > " ... a snippet from > /usr/src/linux-2.6.12/Makefile > > this lets you specify the version numbers for ur > > compilation. And also you System.map and the > initrd > > and get appended with this version number as well. > > > > >It's not like it's hard to manually copy > System.map > > & bzImage to /boot > > >under a unique name and add that new file to your > > bootloader - I'd say > > >doing it by hand and keeping your old working > > kernel in place as a > > >secondary option is a hell of a lot safer than > just > > using "make > > >install". > > > > > > > > >-- > > >Jesper Juhl <jesper.juhl@xxxxxxxxx> > > >Don't top-post > > > http://www.catb.org/~esr/jargon/html/T/top-post.html > > >Plain text mails only, please > > http://www.expita.com/nomime.html > > > > > >-- > > >Kernelnewbies: Help each other learn about the > > Linux kernel. > > >Archive: > > http://mail.nl.linux.org/kernelnewbies/ > > >FAQ: http://kernelnewbies.org/faq/ > > > > > > > Regards > > Rohit Hooda > > > > > Send instant messages to your online friends > http://uk.messenger.yahoo.com > > -- > Kernelnewbies: Help each other learn about the Linux > kernel. > Archive: > http://mail.nl.linux.org/kernelnewbies/ > FAQ: http://kernelnewbies.org/faq/ > > ___________________________________________________________ Switch an email account to Yahoo! Mail, you could win FIFA World Cup tickets. http://uk.mail.yahoo.com -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
