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lvii
n00b
Joined: 28 May 2012
Posts: 16
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 Posted: Thu Aug 16, 2012 10:15 pm Post subject: After install gentoo in KVM VPS, boot with kernel panic |
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Hi guys !
After I install gentoo in ramhost's kvm VPS,but boot with kernel panic:
| Code: | VFS: Cannot open root device "sda3" or unknown-block(0,0)
Please append a correct "root=" boot option; here are the available partions:
...
Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) |
From that wiki:
http://wiki.gentoo.org/wiki/Knowledge_Base:Unable_to_mount_root_fs
| Code: | The panic informs you that the Linux kernel is unable to either
detect the controller for your hard disk (a likely candidate if the message says unknown-block(0,0)) |
I boot from the liveCD (gentoo i686), got these info:
| Code: | # lspci -k
...
00:01.1 IDE interface: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II]
Subsystem: Red Hat, Inc Qemu virtual machine
Kernel driver in use: ata_piix
Kernel modules: ata_piix
... |
I search the ata_piix kernel module info from my hand kernel config:
| Code: | # grep -i piix .config
CONFIG_ATA_PIIX=y
CONFIG_PATA_OLDPIIX=y
CONFIG_PATA_MPIIX=y
# CONFIG_I2C_PIIX4 is not set |
this guys have the similar problem:
https://forums.gentoo.org/viewtopic-t-871501-start-0.html
this post mentioned the VIRTIO driver :
the drivers you select in your kernel will vary based upon how you start up your KVM guest ...
I did not compile the ‘VIRTIO’ driver into the kernel:
| Code: | # grep -i virtio .config
# Virtio drivers
# CONFIG_VIRTIO_PCI is not set
# CONFIG_VIRTIO_BALLOON is not set
# CONFIG_VIRTIO_MMIO is not set |
anybody has got the similar problem with solution ?
thanks for your help .... |
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gringo
Advocate
Joined: 27 Apr 2003
Posts: 3793
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| Posted: Fri Aug 17, 2012 3:33 pm Post subject: |
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it depends o what diver you want to use first ( regular emulated pata driver or the virtio driver) and therefore the way you launch qemu changes.
how are you launching qemu ?
cheers |
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Installing Gentoo
