Cant boot a compiled kernel

Hi,
I want to use Arch to mess with the source of linux 3.2.7. Unfortunately, I cannot even get the regular 3.2.7 kernel to boot.
I basically followed the guide at:
https://wiki.archlinux.org/index.php/Ke … raditional
I downloaded the source, did make mrproper, make menuconfig, make all and make modules_install. I copied arch/x86/bzImage to /boot as well as System.map and created a cpio ramdisk using mkinitcpio using
mkinitcpio -g /boot/initramfs-test.img -k 3.2.7-test
In the end my /boot contained:
initramfs-test.img
vmlinuz-test
System.map-test
I tried booting with Syslinux, GRUB and GRUB2 modifying the options for all of them appropriately.
For Syslinux and GRUB if use a UUID in the root field for their respective config files I get the error that the root device cannot be found during boot. If I use root=/dev/sda4 (which is my root partition, checked it using stat /dev/sda4) I successfully mount the root partition but get an error that /sbin/init does not exist. That's weird since /sbin/init is there. I believe both of these errors have something to do with ramdisk but not sure what.
With GRUB2 booting just freezes at "Loading init ramdisk".
I read a ton on these errors online and tried all kinds of stuff and could not get it to work. Any help will be greatly appreciated!
Thanks

Thanks tomk and sorry for the ambiguous post.
I actually managed to get it finally running, I basically screwed up my .config file. This was not obvious to me at all (total noob at compiling kernels). I just used my current arch config file instead of messing with menuconfig myself and it worked. I still don't know why it works, so if you could point me to a source of enlightenment I would appreciate that. Right now compilation time is atrocious even with the -j option for make.
Regarding your question, I want to screw around with the latest pax patch and add some hooks of my own to security.h which is why I need 3.2.7.
Thanks again

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I compile the newest Linux kernel.
I read Archlinux wiki about how to edit GRUB for boot new compile kernel,
but Archlinux wiki do not reference to it.
Who can help me, baby?

bangkok_manouel wrote:
how did you build your kernel? traditional way or arch way?
if it's the arch way (TM), here's an example of a custom kernel with -mm patch.
what I have in /boot:
-rw-r--r-- 1 root root 4.3M 2008-12-23 09:52 kernel26mm-fallback.img
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now here's the /boot/grub/menu.lst related entry (you may add the fallback one):
# (2) Arch Linux
title kernel26mm
root (hd0,0)
kernel /vmlinuz26mm root=/dev/sda5 ro vga=773
initrd /kernel26mm.img
Should be traditional way.

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ah.. I have a pickle here guys. PowerBook G4 15 inch 1.67 1gbDDR2 ram. I just got this sucker like 2 months or less ago. I am not getting Kernel Panic during restarts every time and cant boot from a DVD or CD. they are not burned. here is the panic.log.
Darwin Kernel Version 8.4.0: Tue Jan 3 18:22:10 PST 2006; root:xnu-792.6.56.obj~1/RELEASE_PPC
Tue Jan 24 21:56:32 2006
panic(cpu 0 caller 0x00294084): sbflush sb->sb_so already null sb=239766c
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Backtrace:
0x00095718 0x00095C30 0x0002683C 0x00294084 0x00293678 0x002935A0 0x00292EE0 0x00159A90
0x0014F7D0 0x001504C0 0x0013B0B4 0x0013B1C8 0x0011D308 0x000A9894
Proceeding back via exception chain:
Exception state (sv=0x2D203280)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)
Kernel version:
Darwin Kernel Version 8.4.0: Tue Jan 3 18:22:10 PST 2006; root:xnu-792.6.56.obj~1/RELEASE_PPC
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haha oh man thanks for startin slow with me, but we are passed that tested RAM, start up items, prefs, tried makin a new user account, as I stated before I can not boot from a DVD/CD.. that was one of the problems so I cant run anything that involves tageting the main HDD while its mounted. I have also repaired perms, ran fsck, tried booting up DiskWarrior(didnt boot from the CD), etc. if any one knows this perticular kernel panic string and can point out what the conflict is I can resolve it but other than that I have ran the run of the mill check to see if everything is in order procedure again and again.

Update modules with compiling kernel from soure issue.

Compiling kernel from abs or aur take me much time, so i decide compile kernel from source, compilation and installation successfully but make initial RAM disk doesn't update full modules (crypto,lvm...). I specified -c option to /etc/mkinitcpio.conf but the result is the sam, non-autodectec doesn't help too. When i look into /lib/modules directory, 3.6.6-1-ARCH folder contain "kernel" folder which has a lot of things (arch, crypto, net..) and i think this is my extra modules were declared in HOOK array's mkinitcpio.conf. The another one only contain net folder so i can't boot into this kernel without having loaded others.
any suggestion for this problem? tks for reply.

am sorry, i re-tried with HOOK array without autodectect and it can load modules but there are two error:
==> ERROR: module not found: `dm-crypt`
==> ERROR: modules not found: `dm-snapshot`
ok i will try to load these modules by manually.
EDIT: i tried to load dm-mod, dm-crypt, dm-snapshot but it isn't helpful. Errors still remain. any suggestion?
Last edited by angelfalls (2012-11-12 23:33:53)

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I have compiled a few kernels in an environment in which it's designed to run on - but cross compiling is completely new to me. However - I will persevere because I have wanted to learn this for a while now.
The target system is an arm based board for a NAS. I am using QEMU to install and configure a Debian system but it requires a working kernel in order to boot.
I have installed the arm-elf-gcc-base package (which I assume is the toolchain - am I wrong on this?) but I don't know where to go from there.
How do I invoke this particular toolchain to compile a kernel for the target arch?
Any other pointers or 'gotchas' would be greatly appreciated.
Thank you.

Which board is it?
Even if you manage to cross compile, kernel will need some extra configuration or patching to boot in qemu.
I have Raspberry Pi and qemu needs custom kernel to boot RPi images, but it's almost useless since there is
no support for network adapter. I have never cross compiled anything for it, but you might want to read on RPi
kernel cross compilation since there is a lot of documentation and you probably need just a different toolchain.
What I'm doing is distributed cross compiling via distcc. That way most of work gets done on my laptop, but it's
still quite slow because makepkg doesn't support distcc pump for distributing pre-processing.
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Re-compile kernel(2.4.22) with Con Kolivas & gcc 3.3.1

Help!
Has anyone figured-out how to compile 2.4.22 with gcc 3.3.1?
I've successfully applied Con Kolivas -ck2 patches+fixes from http://kernel.kolivas.org but I have multiple 'unresolved symbols' after re-boot on new kernel.
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Thanx.

OK -- it worked better with gcc-3.2.1-1. I used the exact same kernel and config. The only unresolved symbols are:
.../drivers/atm/he.o
.../drivers/net/sk98lin/sk98lin.o
I read around on Google that while the kernel will compile under gcc3, not all the drivers will(!?).
I suppose I don't need those two drivers for my SONY PCG-F490 laptop, anyway, so I may just take them out and try again.
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A PKGBUILD that helps you compile kernel from local source tree

I don't know if someone did this beofore. Hours ago I wrote a PKGBUILD file for compiling kernel,
it is different than the one from abs. It allows you
compile a kernel from a exiting kernel source tree and leave it clean.
honor the Archway, this means you have a clean filesystem
It is acutally because I'm currently playing with The Eudyptula Challenge.
and I'm tied our compress/decompress a kernel tree all the time. If you are kernel developer, you
may also find it useful.
The PKGBUILD file worked on my machine, I will add headers and docs later.
Oh, almost forgot: here is my PKGBUILD:
#So we will have a clean src tree
pkgbase=linux-test
_kernel_bin=kernel_build
#the variable you have to provide
_builddir=kernel_build
kernel_src_dir='/home/developer/Courses/kernel-base'
_srcname=kernel_tree
#end the variable you have to provide
pkgver=3.8.1
pkgrel=1
pkgdesc="The Linux kernel and modules"
depends=('coreutils' 'linux-firmware' 'kmod' 'mkinitcpio>=0.7')
makedepends=('xmlto' 'docbook-xsl' 'kmod' 'inetutils' 'bc')
optdepends=('crda: to set the correct wireless channels of your country')
provides=("kernel26${_kernelname}=${pkgver}")
conflicts=("kernel26${_kernelname}")
replaces=("kernel26${_kernelname}")
arch=('i686' 'x86_64')
url="http://www.kernel.org/"
license=('GPL2')
source=(#if we provide this, means kernel compile progress is already done
"${_kernel_bin}.tar.xz"
'linux.preset'
sha256sums=('65847bc847344434657db729d2dde4a408e303ea29ae1409520cecee8da6fc3d'
'2c2e8428e2281babcaf542e246c2b63dea599abb7ae086fa482081580f108a98')
#this one strip the linux off
_kernelname=${pkgbase#linux}
prepare() {
#XXX:checked
#build dir has to be the same as kernel_bin files, then builddir is created
#automatically by tar
if [ "${kernel_src_dir}" == "" ];then
return 1
fi
#provide kernel source tree for compile and move modules
ln -s ${kernel_src_dir} ${srcdir}/${_srcname}
mkdir -p "${srcdir}/${_srcname}"
#we need to check here if there exist kernel bin files
if [ "${_kernel_bin}" == "" ]; then
make O="${srcdir}/${_builddir}" menuconfig
fi
build() {
#XXX:checked
cd "${srcdir}/${_srcname}"
#we need to check here if there exist kernel bin files
if [ "${_kernel_bin}" == "" ]; then
#return 1
make O="${srcdir}/${_builddir}" bzImage modules
fi
#otherwise this step is done already done
_package() {
#we dont need to worry about mkinitcpio, depmod thing, They are done by
#install script, we need to provide a preset and install file instead.
#we build kernel objs on _builddir, and install them in pkgdir
#install binary files, this means we have a compiled binary tree
cd "${srcdir}/${_srcname}"
#echo "$(pwd)"
KARCH=x86
install=linux.install
# get kernel version
_kernver="$(make O="${srcdir}/${_builddir}" kernelrelease)"
_kernver=$(echo "${_kernver}" | sed -n 2p -)
#strip the -dirty away
_kernver=${_kernver%-*}
_basekernel=${_kernver%%-*}
_basekernel=${_basekernel%.*}
mkdir -p "${pkgdir}"/{lib/modules,lib/firmware,boot}
make O="${srcdir}/${_builddir}" INSTALL_MOD_PATH="${pkgdir}" modules_install
cp "${srcdir}/${_builddir}"/arch/$KARCH/boot/bzImage "${pkgdir}/boot/vmlinuz-${pkgbase}"
# set correct depmod command for install
cp -f "${startdir}/${install}" "${startdir}/${install}.pkg"
true && install=${install}.pkg
sed -e "s/KERNEL_NAME=.*/KERNEL_NAME=${_kernelname}/" -i "${startdir}/${install}"
sed "s/KERNEL_VERSION=.*/KERNEL_VERSION=${_kernver}/" -i "${startdir}/${install}"
# install mkinitcpio preset file for kernel
install -D -m644 "${srcdir}/linux.preset" "${pkgdir}/etc/mkinitcpio.d/${pkgbase}.preset"
sed \
-e "1s|'linux.*'|'${pkgbase}'|" \
-e "s|ALL_kver=.*|ALL_kver=\"/boot/vmlinuz-${pkgbase}\"|" \
-e "s|default_image=.*|default_image=\"/boot/initramfs-${pkgbase}.img\"|" \
-i "${pkgdir}/etc/mkinitcpio.d/${pkgbase}.preset"
# remove build and source links
rm -f "${pkgdir}"/lib/modules/${_kernver}/{source,build}
# remove the firmware
rm -rf "${pkgdir}/lib/firmware"
# gzip -9 all modules to save 100MB of space
find "${pkgdir}" -name '*.ko' -exec gzip -9 {} \;
# make room for external modules
ln -s "../extramodules-${_basekernel}${_kernelname:--ARCH}" "${pkgdir}/lib/modules/${_kernver}/extramodules"
# add real version for building modules and running depmod from post_install/upgrade
mkdir -p "${pkgdir}/lib/modules/extramodules-${_basekernel}${_kernelname:--ARCH}"
echo "${_kernver}" > "${pkgdir}/lib/modules/extramodules-${_basekernel}${_kernelname:--ARCH}/version"
# Now we call depmod...
#echo "Call Depmod"
cp "${srcdir}/${_builddir}/System.map" System.map
depmod -b "${pkgdir}" -F System.map "${_kernver}"
#echo "Called Depmod"
# move module tree /lib -> /usr/lib
mkdir -p "${pkgdir}/usr"
mv "${pkgdir}/lib" "${pkgdir}/usr/"
# add vmlinux
install -D -m644 "${srcdir}/${_builddir}/"vmlinux "${pkgdir}/usr/lib/modules/${_kernver}/build/vmlinux"
pkgname=("${pkgbase}")
for _p in ${pkgname[@]}; do
eval "package_${_p}() {
_package${_p#${pkgbase}}
done
and here is the address of it on github
Last edited by xedchou (2014-12-23 12:41:55)

Based on the title alone I almost reflexively binned this thread. Please rename this thread to *something* relating to what you're actually posting.

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saved the file to my desktop as Hello.java
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I suggest you make a directory C:\java and save your source file there rather than on the desktop. In the command prompt, enter cd \java to make it the current working directory and then enter javac Hello.java.
@Pravin: The question is about compiling, not running. CLASSPATH has nothing to do with this problem.
db

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