files in boot folder are missing on reboot

[aus9]

hi

 

I started to compile my own kernel. (Not yet a full success)

I amended my grub entry and new kernel needs no initrd image

I have a standard 10.1 kernel 2.6.8.1-10 that uses vmlinuz and symbolic links to the real kernel and associated System.map file

 

2) On first attempt with my compiled 2.6.9 kernel I saw a message that my system map was not found and (on reboot) my map file was missing.

So I deleted all symbolic links and amended grub for standard mdk kernel to boot and it works ok

 

Then I added my bzImage and its related system map file but called these

bzImage-269 and System.map-269 and grub amended etc

 

3) On reboot I can see its my new bzImage loading but altho my bzImage file remains in folder /boot the map file is gone on reboot.

 

4) Anyone know which service is playing with my boot directory?

[aru]

I don't know what steps lead you to this situation, but the System.map file for your kernel is the one generated during the kernel compilation, that you could either place in your boot directory by hand (cp $builddir/System.map /boot/System.map-$kerneltag) or by running make install after the compilation).

 

You don't need to link your brand new System.map-version to default /boot/System.map because that is automated by /etc/rc.sysinit in

# Adjust symlinks as necessary in /boot to keep system services from
# spewing messages about mismatched System maps and so on.
if [ -L /boot/System.map -a -r /boot/System.map-`uname -r` -a \
   ! /boot/System.map -ef /boot/System.map-`uname -r` ]; then
   ln -s -f System.map-`uname -r` /boot/System.map 2>/dev/null
fi
if [ ! -e /boot/System.map -a -r /boot/System.map-`uname -r` ]; then
   ln -s -f System.map-`uname -r` /boot/System.map 2>/dev/null
fi

 

also the problem you are experiencing could be happening because you wrong linked a System.map of an older/different version of the kernel running. And it gets deleted on every reboot because of /etc/init.d/kheader (not sure 100%); the code that may be acting is:

function remove_orphaned {
   local version= i=
   for i in /boot/kernel.h-* /boot/System.map-* /boot/config-*; do
   version=${i#*-}
   [[ -f /boot/vmlinuz-${version} ]] || rm -f ${i}
   done
}

 

HTH

 

...and merry christmas to all, see you!

[aus9]

aru

 

good stuff I will report back after chrissy.

 

the other thought I will check out is my lack of

depmod -a in the reading I have done.

 

merry Xmas

[aus9]

it appears that I cheated, who me? I had not used the correct kernel numbering that I had compiled.

I renamed my missing file System.map-269 instead of -2.6.9.

 

2) instead of cp and rename I used depmod -a and make install then edit my grub so my steps for those interested are

 

mkdir /opt/k and unpack new kernel there eg /opt/k/linux-2.6.9

delete link to /usr/src/linux from the k source

add new link.......... ln -s /opt/k/linux-2.6.9 /usr/src/linux

cd /opt/k/linuxetc

make mrproper

make menuconfig (or xconfig)

make bzImage; make modules; make modules_install

depmod -a

make install

(make install then attempts to mkinitrd but I have compiled in all I need [i think] so ignore error)

check /boot has vmlinuz-2.6.9 and System.map-2.6.9 and config-2.6.9

edit /boot/grub/menu.lst for new kernel and old kernels

 

My kernel is not perfect but it boots proving I do not need initrd.img and can now start to tweak it.

 

thanks for your help