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Steve S.
Tux's lil' helper
Joined: 22 Sep 2005
Posts: 131
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 Posted: Mon May 28, 2018 3:18 pm Post subject: I survived a kernel panic...now what? |
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Now I'm scared to reboot. 
It said attempting to kill init, kernel panic! code=00000009
After about the third or fourth try, it kicked on a reboot.
This is a relatively new install. Only one kernel on there. All under one partitiion (plus a swap).
Is there some update I should run? Some emerge sync or something that might help? Advise? |
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54237
Location: 56N 3W
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| Posted: Mon May 28, 2018 3:25 pm Post subject: |
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Steve S.
Tell us how you made your kernel and your initrd, if you have one.
init is Process ID 1. It owns all the userspace processes on your system.
Killing init is like pulling the plug out, so it a very bad thing.
Are you using BIOS or UEFI?
What about systemd?
I guess this happens on boot and you never get any further?
If it happens randomly, during normal operation, it may well be hardware.
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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Steve S.
Tux's lil' helper
Joined: 22 Sep 2005
Posts: 131
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| Posted: Mon May 28, 2018 3:43 pm Post subject: |
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| NeddySeagoon wrote: | Steve S.
Tell us how you made your kernel and your initrd, if you have one.
init is Process ID 1. It owns all the userspace processes on your system.
Killing init is like pulling the plug out, so it a very bad thing.
Are you using BIOS or UEFI?
What about systemd?
I guess this happens on boot and you never get any further?
If it happens randomly, during normal operation, it may well be hardware. |
Made my kernel by using a livecd, going through the install process, unpacking tarball,chrooting, etc. kernelgen..is that what you are asking?
Using BIOS.
It is a pentium 4, not sure what you want for systemd.
Only happens instantly after grub at boot.
And thanks for the quick reply! |
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sao98021
Tux's lil' helper
Joined: 03 Apr 2012
Posts: 145
Location: Michigan
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| Posted: Mon May 28, 2018 3:45 pm Post subject: |
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| dont be scared, just reboot into livecd/usb again and chroot, maybe use a genkernel for fallback so you wont have to chroot anymore |
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54237
Location: 56N 3W
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| Posted: Mon May 28, 2018 4:10 pm Post subject: |
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Steve S,
The kernel configuration and build tool is genkernel.
That should just work for most users.
It would be useful to see your /boot/grub/grub.cfg file.
No need to chroot,
Boot your install media, mount your filesystems and its at /mnt/gentoo/boot/grub/grub.cfg
The output of will be helpful too.
Lastly, | Code: | | ls -l /mnt/gentoo/boot |
will be good.
systemd is an alternate init system. You would know if you were using it, so you are not.
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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Steve S.
Tux's lil' helper
Joined: 22 Sep 2005
Posts: 131
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| Posted: Mon May 28, 2018 5:48 pm Post subject: |
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I'm still in an active system; no need to boot into live media yet.
Here is grub.cfg:
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#
# DO NOT EDIT THIS FILE
#
# It is automatically generated by grub-mkconfig using templates
# from /etc/grub.d and settings from /etc/default/grub
#
### BEGIN /etc/grub.d/00_header ###
if [ -s $prefix/grubenv ]; then
load_env
fi
if [ "${next_entry}" ] ; then
set default="${next_entry}"
set next_entry=
save_env next_entry
set boot_once=true
else
set default="0"
fi
if [ x"${feature_menuentry_id}" = xy ]; then
menuentry_id_option="--id"
else
menuentry_id_option=""
fi
export menuentry_id_option
if [ "${prev_saved_entry}" ]; then
set saved_entry="${prev_saved_entry}"
save_env saved_entry
set prev_saved_entry=
save_env prev_saved_entry
set boot_once=true
fi
function savedefault {
if [ -z "${boot_once}" ]; then
saved_entry="${chosen}"
save_env saved_entry
fi
}
function load_video {
if [ x$feature_all_video_module = xy ]; then
insmod all_video
else
insmod efi_gop
insmod efi_uga
insmod ieee1275_fb
insmod vbe
insmod vga
insmod video_bochs
insmod video_cirrus
fi
}
if [ x$feature_default_font_path = xy ] ; then
font=unicode
else
insmod part_msdos
insmod ext2
set root='hd0,msdos2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos2 --hint-efi=hd0,msdos2 --hint-baremetal=ahci0,msdos2 b1d95ff2-f8a3-493f-adba-b3dc97385fb1
else
search --no-floppy --fs-uuid --set=root b1d95ff2-f8a3-493f-adba-b3dc97385fb1
fi
font="/usr/share/grub/unicode.pf2"
fi
if loadfont $font ; then
set gfxmode=auto
load_video
insmod gfxterm
fi
terminal_output gfxterm
if [ x$feature_timeout_style = xy ] ; then
set timeout_style=countdown
set timeout=5
# Fallback hidden-timeout code in case the timeout_style feature is
# unavailable.
elif sleep --verbose --interruptible 5 ; then
set timeout=0
fi
### END /etc/grub.d/00_header ###
### BEGIN /etc/grub.d/10_linux ###
menuentry 'Gentoo GNU/Linux' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-simple-b1d95ff2-f8a3-493f-adba-b3dc97385fb1' {
load_video
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos2 --hint-efi=hd0,msdos2 --hint-baremetal=ahci0,msdos2 b1d95ff2-f8a3-493f-adba-b3dc97385fb1
else
search --no-floppy --fs-uuid --set=root b1d95ff2-f8a3-493f-adba-b3dc97385fb1
fi
echo 'Loading Linux x86-4.9.95-gentoo ...'
linux /boot/kernel-genkernel-x86-4.9.95-gentoo root=UUID=b1d95ff2-f8a3-493f-adba-b3dc97385fb1 ro
echo 'Loading initial ramdisk ...'
initrd /boot/initramfs-genkernel-x86-4.9.95-gentoo
}
submenu 'Advanced options for Gentoo GNU/Linux' $menuentry_id_option 'gnulinux-advanced-b1d95ff2-f8a3-493f-adba-b3dc97385fb1' {
menuentry 'Gentoo GNU/Linux, with Linux x86-4.9.95-gentoo' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-x86-4.9.95-gentoo-advanced-b1d95ff2-f8a3-493f-adba-b3dc97385fb1' {
load_video
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos2 --hint-efi=hd0,msdos2 --hint-baremetal=ahci0,msdos2 b1d95ff2-f8a3-493f-adba-b3dc97385fb1
else
search --no-floppy --fs-uuid --set=root b1d95ff2-f8a3-493f-adba-b3dc97385fb1
fi
echo 'Loading Linux x86-4.9.95-gentoo ...'
linux /boot/kernel-genkernel-x86-4.9.95-gentoo root=UUID=b1d95ff2-f8a3-493f-adba-b3dc97385fb1 ro
echo 'Loading initial ramdisk ...'
initrd /boot/initramfs-genkernel-x86-4.9.95-gentoo
}
menuentry 'Gentoo GNU/Linux, with Linux x86-4.9.95-gentoo (recovery mode)' --class gentoo --class gnu-linux --class gnu --class os $menuentry_id_option 'gnulinux-x86-4.9.95-gentoo-recovery-b1d95ff2-f8a3-493f-adba-b3dc97385fb1' {
load_video
insmod gzio
insmod part_msdos
insmod ext2
set root='hd0,msdos2'
if [ x$feature_platform_search_hint = xy ]; then
search --no-floppy --fs-uuid --set=root --hint-bios=hd0,msdos2 --hint-efi=hd0,msdos2 --hint-baremetal=ahci0,msdos2 b1d95ff2-f8a3-493f-adba-b3dc97385fb1
else
search --no-floppy --fs-uuid --set=root b1d95ff2-f8a3-493f-adba-b3dc97385fb1
fi
echo 'Loading Linux x86-4.9.95-gentoo ...'
linux /boot/kernel-genkernel-x86-4.9.95-gentoo root=UUID=b1d95ff2-f8a3-493f-adba-b3dc97385fb1 ro single
echo 'Loading initial ramdisk ...'
initrd /boot/initramfs-genkernel-x86-4.9.95-gentoo
}
}
### END /etc/grub.d/10_linux ###
### BEGIN /etc/grub.d/20_linux_xen ###
### END /etc/grub.d/20_linux_xen ###
### BEGIN /etc/grub.d/30_os-prober ###
### END /etc/grub.d/30_os-prober ###
### BEGIN /etc/grub.d/40_custom ###
# This file provides an easy way to add custom menu entries. Simply type the
# menu entries you want to add after this comment. Be careful not to change
# the 'exec tail' line above.
### END /etc/grub.d/40_custom ###
### BEGIN /etc/grub.d/41_custom ###
if [ -f ${config_directory}/custom.cfg ]; then
source ${config_directory}/custom.cfg
elif [ -z "${config_directory}" -a -f $prefix/custom.cfg ]; then
source $prefix/custom.cfg;
fi
### END /etc/grub.d/41_custom ###
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Here is df -T:
| Code: |
Filesystem Type 1K-blocks Used Available Use% Mounted on
udev devtmpfs 10240 4 10236 1% /dev
/dev/sda2 ext2 44093584 6868136 34985604 17% /
tmpfs tmpfs 128576 576 128000 1% /run
shm tmpfs 642876 7520 635356 2% /dev/shm
cgroup_root tmpfs 10240 0 10240 0% /sys/fs/cgroup
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Steve S.
Tux's lil' helper
Joined: 22 Sep 2005
Posts: 131
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| Posted: Mon May 28, 2018 5:53 pm Post subject: |
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And ls -l of /boot is:
| Code: |
total 12996
-rw-r--r-- 1 root root 2552946 May 13 20:51 System.map-genkernel-x86-4.9.95-gentoo
drwxr-xr-x 6 root root 4096 May 19 21:27 grub
-rw-r--r-- 1 root root 5423124 May 14 00:03 initramfs-genkernel-x86-4.9.95-gentoo
-rw-r--r-- 1 root root 5289792 May 13 20:51 kernel-genkernel-x86-4.9.95-gentoo
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54237
Location: 56N 3W
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| Posted: Mon May 28, 2018 6:12 pm Post subject: |
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Steve S.
That all looks "mostly harmless".
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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Steve S.
Tux's lil' helper
Joined: 22 Sep 2005
Posts: 131
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| Posted: Mon May 28, 2018 6:21 pm Post subject: |
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| NeddySeagoon wrote: | Steve S.
That all looks "mostly harmless". |
Thanks, good to know! 
But any idea on the kernel panic? Something I need to update/upgrade, any of that? |
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NeddySeagoon
Administrator
Joined: 05 Jul 2003
Posts: 54237
Location: 56N 3W
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| Posted: Mon May 28, 2018 7:13 pm Post subject: |
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Steve S.
Init is not supposed to die - ever.
I suspect that the handoff from the init script in the initramfs to the init on your HDD isn't happening, so the init script in the initramfs runs out of things to do and falls of the end.
Your kernel line is linux | Code: | | /boot/kernel-genkernel-x86-4.9.95-gentoo root=UUID=b1d95ff2-f8a3-493f-adba-b3dc97385fb1 ro |
So hopefully UUID=b1d95ff2-f8a3-493f-adba-b3dc97385fb1 is the UUID of the filesystem you want the kernel to mount as root.
What does /sbin/blkid say?
Your kernel filesystem root appears to be on sda2.
| Code: | Filesystem Type 1K-blocks Used Available Use% Mounted on
/dev/sda2 ext2 44093584 6868136 34985604 17% / |
Do the UUIDs match?
Beware the context sensitive use of the term root. Grub uses it to indicate where grub and all the files needed to boot are located.
The kernel uses it to indicate the root of the filesystem tree. Its not a problem to grub or the kernel.
Users need to think about it.
In your install, does /sbin/init exist?
_________________
Regards,
NeddySeagoon
Computer users fall into two groups:-
those that do backups
those that have never had a hard drive fail. |
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Steve S.
Tux's lil' helper
Joined: 22 Sep 2005
Posts: 131
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| Posted: Mon May 28, 2018 7:17 pm Post subject: |
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| NeddySeagoon wrote: | Steve S.
Init is not supposed to die - ever.
I suspect that the handoff from the init script in the initramfs to the init on your HDD isn't happening, so the init script in the initramfs runs out of things to do and falls of the end.
Your kernel line is linux | Code: | | /boot/kernel-genkernel-x86-4.9.95-gentoo root=UUID=b1d95ff2-f8a3-493f-adba-b3dc97385fb1 ro |
So hopefully UUID=b1d95ff2-f8a3-493f-adba-b3dc97385fb1 is the UUID of the filesystem you want the kernel to mount as root.
What does /sbin/blkid say?
Your kernel filesystem root appears to be on sda2.
| Code: | Filesystem Type 1K-blocks Used Available Use% Mounted on
/dev/sda2 ext2 44093584 6868136 34985604 17% / |
Do the UUIDs match?
Beware the context sensitive use of the term root. Grub uses it to indicate where grub and all the files needed to boot are located.
The kernel uses it to indicate the root of the filesystem tree. Its not a problem to grub or the kernel.
Users need to think about it.
In your install, does /sbin/init exist? |
This seems to support that it may be a hardware issue...I'm gonna clone the drive just in case..worried I'm gonna have a full hard drive crashed.. |
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Kernel & Hardware
