Xen Dom U kernel

Xen Dom U kernel

[kishore kumar]

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Hi,

I have Xen 3.4.3 with pvops Dom 0 (2.6.32.10) up and running.
Now I need to install Dom U.
Can any one please let me know where can I find the Dom U kernels which has
10G SRIOV Virtual Function implemented?
How do I  build Dom U kernel??

Thank YOu.

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Re: [Xen-devel] Xen Dom U kernel

[Pasi Kärkkäinen]

On Fri, Apr 09, 2010 at 04:13:02PM -0700, kishore kumar wrote:
>    Hi,
> 
>    I have Xen 3.4.3 with pvops Dom 0 (2.6.32.10) up and running.
>    Now I need to install Dom U.
>    Can any one please let me know where can I find the Dom U kernels which
>    has 10G SRIOV Virtual Function implemented?

Which NIC is this? 
You can always download the VF driver from the vendor.

>    How do I  build Dom U kernel??
> 

Depends what kind of kernel.. PV guest or HVM guest? 

-- Pasi

>    Thank YOu.
> 
> 
> 

> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel

Re: Xen Dom U kernel

[kishore kumar]

[-- Attachment #1.1: Type: text/plain, Size: 1002 bytes --]

I am using 82599 Intel NIC for 10G SRIOV testing.
Which kernel to pick up for using PV guest?
Any specific suggestions on how to build Dom U kernel and which kernel to
pick ??

THank You.

On Wed, Apr 14, 2010 at 9:14 AM, Pasi Kärkkäinen <pasik@iki.fi> wrote:

> On Fri, Apr 09, 2010 at 04:13:02PM -0700, kishore kumar wrote:
> >    Hi,
> >
> >    I have Xen 3.4.3 with pvops Dom 0 (2.6.32.10) up and running.
> >    Now I need to install Dom U.
> >    Can any one please let me know where can I find the Dom U kernels
> which
> >    has 10G SRIOV Virtual Function implemented?
>
> Which NIC is this?
> You can always download the VF driver from the vendor.
>
> >    How do I  build Dom U kernel??
> >
>
> Depends what kind of kernel.. PV guest or HVM guest?
>
> -- Pasi
>
> >    Thank YOu.
> >
> >
> >
>
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@lists.xensource.com
> > http://lists.xensource.com/xen-devel
>
>

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Re: Xen Dom U kernel

[Pasi Kärkkäinen]

On Wed, Apr 14, 2010 at 09:58:58AM -0700, kishore kumar wrote:
>    I am using 82599 Intel NIC for 10G SRIOV testing.

OK.

>    Which kernel to pick up for using PV guest?
>    Any specific suggestions on how to build Dom U kernel and which kernel to
>    pick ??
> 

Are you going to use Xen PV guest or Xen HVM guest? 

PV guest requires pci frontend driver for the VF passthru to work,
so that limits your kernel options..

See: http://wiki.xensource.com/xenwiki/XenPCIpassthrough

-- Pasi

>    THank You.
> 
>    On Wed, Apr 14, 2010 at 9:14 AM, Pasi Kärkkäinen <[1]pasik@iki.fi> wrote:
> 
>      On Fri, Apr 09, 2010 at 04:13:02PM -0700, kishore kumar wrote:
>      >    Hi,
>      >
>      >    I have Xen 3.4.3 with pvops Dom 0 (2.6.32.10) up and running.
>      >    Now I need to install Dom U.
>      >    Can any one please let me know where can I find the Dom U kernels
>      which
>      >    has 10G SRIOV Virtual Function implemented?
> 
>      Which NIC is this?
>      You can always download the VF driver from the vendor.
>      >    How do I  build Dom U kernel??
>      >
> 
>      Depends what kind of kernel.. PV guest or HVM guest?
> 
>      -- Pasi
> 
>      >    Thank YOu.
>      >
>      >
>      >
> 
>      > _______________________________________________
>      > Xen-devel mailing list
>      > [2]Xen-devel@lists.xensource.com
>      > [3]http://lists.xensource.com/xen-devel
> 
> References
> 
>    Visible links
>    1. mailto:pasik@iki.fi
>    2. mailto:Xen-devel@lists.xensource.com
>    3. http://lists.xensource.com/xen-devel

Re: Xen Dom U kernel

[Jeremy Fitzhardinge]

On 04/09/2010 04:13 PM, kishore kumar wrote:
> How do I  build Dom U kernel??

Your dom0 kernel will also boot as domU (either PV or HVM).

    J

Re: [Xen-devel] Xen Dom U kernel

[kishore kumar]

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 I am using my Dom 0 kernel to boot as my Dom U.
I edited /etc/xen/xmexample1 file and modified only below lines

kernel="/boot/vmlinux-2.6.32.10"
memory=512
vcpus=5
root = "/dev/VolGroup01/LogVol00 ro"
Below is the output I pasted after freezing.  Not sure what is wrong.  Can
you please help me here??
I doubt if I have provided the correct root option?


[root@localhost xen]# xm list

Name ID Mem VCPUs State Time(s)

Domain-0 0 3621 12 r----- 377.1

[root@localhost xen]# xm create -c /home/kishore/mar_15/xmexample1 vmid=1

Using config file "/home/kishore/mar_15/xmexample1".

Started domain DomainU (id=1)

Initializing cgroup subsys cpuset

Initializing cgroup subsys cpu

Linux version 2.6.32.10 (kishore@localhost.localdomain) (gcc version 4.1.2
20080704 (Red Hat 4.1.2-46)) #2 SMP Wed Mar 17 15:56:57 PDT 2010

Command line: root=/dev/VolGroup01/LogVol00 ro ip=:127.0.255.255::::eth0:dhcp
4

KERNEL supported cpus:

Intel GenuineIntel

AMD AuthenticAMD

Centaur CentaurHauls

ACPI in unprivileged domain disabled

BIOS-provided physical RAM map:

Xen: 0000000000000000 - 00000000000a0000 (usable)

Xen: 00000000000a0000 - 0000000000100000 (reserved)

Xen: 0000000000100000 - 0000000020000000 (usable)

DMI not present or invalid.

last_pfn = 0x20000 max_arch_pfn = 0x400000000

init_memory_mapping: 0000000000000000-0000000020000000

No NUMA configuration found

Faking a node at 0000000000000000-0000000020000000

Bootmem setup node 0 0000000000000000-0000000020000000

NODE_DATA [0000000000008000 - 000000000001ffff]

bootmap [0000000000020000 - 0000000000023fff] pages 4

(6 early reservations) ==> bootmem [0000000000 - 0020000000]

#0 [0000000000 - 0000001000] BIOS data page ==> [0000000000 - 0000001000]

#1 [00027aa000 - 00027c3000] XEN PAGETABLES ==> [00027aa000 - 00027c3000]

#2 [0000006000 - 0000008000] TRAMPOLINE ==> [0000006000 - 0000008000]

#3 [0001000000 - 0002686dd8] TEXT DATA BSS ==> [0001000000 - 0002686dd8]

#4 [00026a7000 - 00027aa000] XEN START INFO ==> [00026a7000 - 00027aa000]

#5 [0000100000 - 00001e6000] PGTABLE ==> [0000100000 - 00001e6000]

Zone PFN ranges:

DMA 0x00000000 -> 0x00001000

DMA32 0x00001000 -> 0x00100000

Normal 0x00100000 -> 0x00100000

Movable zone start PFN for each node

early_node_map[2] active PFN ranges

0: 0x00000000 -> 0x000000a0

0: 0x00000100 -> 0x00020000

SMP: Allowing 1 CPUs, 0 hotplug CPUs

No local APIC present

APIC: disable apic facility

PM: Registered nosave memory: 00000000000a0000 - 0000000000100000

Allocating PCI resources starting at 20000000 (gap: 20000000:e0000000)

Booting paravirtualized kernel on Xen

Xen version: 3.4.3-rc4-pre (preserve-AD)

NR_CPUS:512 nr_cpumask_bits:512 nr_cpu_ids:1 nr_node_ids:1

PERCPU: Embedded 478 pages/cpu @ffff8800027d4000 s1928024 r8192 d21672
u1957888

pcpu-alloc: s1928024 r8192 d21672 u1957888 alloc=478*4096

pcpu-alloc: [0] 0

Xen: using vcpu_info placement

Built 1 zonelists in Node order, mobility grouping on. Total pages: 127415

Policy zone: DMA32

Kernel command line: root=/dev/VolGroup01/LogVol00 ro
ip=:127.0.255.255::::eth0:dhcp
4

PID hash table entries: 2048 (order: 2, 16384 bytes)

Initializing CPU#0

Checking aperture...

No AGP bridge found

Memory: 483300k/524288k available (4593k kernel code, 384k absent, 40604k
reserved, 3427k data, 3392k init)

SLUB: Genslabs=14, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1

Hierarchical RCU implementation.

NR_IRQS:4352 nr_irqs:256

Console: colour dummy device 80x25

console [tty0] enabled

console [hvc0] enabled

Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar

... MAX_LOCKDEP_SUBCLASSES: 8

... MAX_LOCK_DEPTH: 48

... MAX_LOCKDEP_KEYS: 8191

... CLASSHASH_SIZE: 4096

... MAX_LOCKDEP_ENTRIES: 16384

... MAX_LOCKDEP_CHAINS: 32768

... CHAINHASH_SIZE: 16384

memory used by lock dependency info: 6367 kB

per task-struct memory footprint: 2688 bytes

allocated 5242880 bytes of page_cgroup

please try 'cgroup_disable=memory' option if you don't want memory cgroups

installing Xen timer for CPU 0

Detected 3200.112 MHz processor.

Calibrating delay loop (skipped), value calculated using timer frequency..
6400.22 BogoMIPS (lpj=3200112)

Security Framework initialized

SELinux: Initializing.

Dentry cache hash table entries: 65536 (order: 7, 524288 bytes)

Inode-cache hash table entries: 32768 (order: 6, 262144 bytes)

Mount-cache hash table entries: 256

Initializing cgroup subsys ns

Initializing cgroup subsys cpuacct

Initializing cgroup subsys memory

Initializing cgroup subsys devices

Initializing cgroup subsys freezer

Initializing cgroup subsys net_cls

CPU: L1 I cache: 32K, L1 D cache: 32K

CPU: L2 cache: 256K

CPU: L3 cache: 12288K

CPU 0/0x5 -> Node 0

CPU: Unsupported number of siblings 32

Performance Events: unsupported p6 CPU model 44 no PMU driver, software
events only.

SMP alternatives: switching to UP code

Freeing SMP alternatives: 24k freed

ftrace: converting mcount calls to 0f 1f 44 00 00

ftrace: allocating 27790 entries in 109 pages

Brought up 1 CPUs

Grant table initialized

regulator: core version 0.5

Time: 165:165:165 Date: 165/165/65

NET: Registered protocol family 16

xenbus_probe wake_waiting

xenbus_probe_init ok

PCI: setting up Xen PCI frontend stub

bio: create slab <bio-0> at 0

ACPI: Interpreter disabled.

xenbus_probe_backend_init bus registered ok

xenbus_probe_devices backend

xenbus_probe_devices failed xenbus_directory

backend_probe_and_watch devices probed ok

backend_probe_and_watch watch add ok ok

backend_probe_and_watch all done

xenbus_probe_frontend_init bus registered ok

xenbus_probe_devices device

xenbus_probe_devices 1/2 vif

xenbus_probe_device_type type vif

xenbus_probe_device_type 1/1 0

xenbus_probe_device_type done

xenbus_probe_devices 2/2 console

xenbus_probe_device_type type console

xenbus_probe_device_type 1/1 0

xenbus_probe_device_type done

xenbus_probe_devices done

frontend_probe_and_watch devices probed ok

frontend_probe_and_watch watch add ok ok

frontend_probe_and_watch all done

xen_balloon: Initialising balloon driver with page order 0.

vgaarb: loaded

SCSI subsystem initialized

usbcore: registered new interface driver usbfs

usbcore: registered new interface driver hub

usbcore: registered new device driver usb

PCI: System does not support PCI

PCI: System does not support PCI

NetLabel: Initializing

NetLabel: domain hash size = 128

NetLabel: protocols = UNLABELED CIPSOv4

NetLabel: unlabeled traffic allowed by default

Switching to clocksource xen

kstop/0 used greatest stack depth: 6568 bytes left

pnp: PnP ACPI: disabled

NET: Registered protocol family 2

IP route cache hash table entries: 4096 (order: 3, 32768 bytes)

TCP established hash table entries: 16384 (order: 6, 262144 bytes)

TCP bind hash table entries: 16384 (order: 8, 1179648 bytes)

TCP: Hash tables configured (established 16384 bind 16384)

TCP reno registered

NET: Registered protocol family 1

DMA-API: preallocated 32768 debug entries

DMA-API: debugging enabled by kernel config

platform rtc_cmos: registered platform RTC device (no PNP device found)

audit: initializing netlink socket (disabled)

type=2000 audit(1271430253.458:1): initialized

HugeTLB registered 2 MB page size, pre-allocated 0 pages

VFS: Disk quotas dquot_6.5.2

Dquot-cache hash table entries: 512 (order 0, 4096 bytes)

msgmni has been set to 944

cryptomgr_test used greatest stack depth: 5864 bytes left

cryptomgr_test used greatest stack depth: 5816 bytes left

alg: No test for stdrng (krng)

Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252)

io scheduler noop registered

io scheduler anticipatory registered

io scheduler deadline registered

io scheduler cfq registered (default)

pci_hotplug: PCI Hot Plug PCI Core version: 0.5

pciehp: PCI Express Hot Plug Controller Driver version: 0.4

acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5

pci-stub: invalid id string ""

registering netback

Non-volatile memory driver v1.3

Linux agpgart interface v0.103

Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled

brd: module loaded

loop: module loaded

input: Macintosh mouse button emulation as /class/input/input0

Fixed MDIO Bus: probed

PNP: No PS/2 controller found. Probing ports directly.

i8042.c: No controller found.

mice: PS/2 mouse device common for all mice

rtc_cmos rtc_cmos: rtc core: registered rtc_cmos as rtc0

device-mapper: uevent: version 1.0.3

device-mapper: ioctl: 4.15.0-ioctl (2009-04-01) initialised:
dm-devel@redhat.com

cpuidle: using governor ladder

cpuidle: using governor menu

usbcore: registered new interface driver hiddev

usbcore: registered new interface driver usbhid

usbhid: v2.6:USB HID core driver

nf_conntrack version 0.5.0 (4066 buckets, 16264 max)

CONFIG_NF_CT_ACCT is deprecated and will be removed soon. Please use

nf_conntrack.acct=1 kernel parameter, acct=1 nf_conntrack module option or

sysctl net.netfilter.nf_conntrack_acct=1 to enable it.

ip_tables: (C) 2000-2006 Netfilter Core Team

TCP cubic registered

Initializing XFRM netlink socket

NET: Registered protocol family 17

registered taskstats version 1

No TPM chip found, activating TPM-bypass!

XENBUS: Device with no driver: device/vif/0

XENBUS: Device with no driver: device/console/0

Magic number: 1:252:3141

drivers/rtc/hctosys.c: unable to open rtc device (rtc0)

Initalizing network drop monitor service

md: Waiting for all devices to be available before autodetect

md: If you don't use raid, use raid=noautodetect

md: Autodetecting RAID arrays.

md: Scanned 0 and added 0 devices.

md: autorun ...

md: ... autorun DONE.

VFS: Cannot open root device "VolGroup01/LogVol00" or unknown-block(0,0)

Please append a correct "root=" boot option; here are the available
partitions:

Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(0,0)

Pid: 1, comm: swapper Not tainted 2.6.32.10 #2

Call Trace:

[<ffffffff8105b747>] panic+0xa5/0x167

[<ffffffff819d2fa6>] ? printk_all_partitions+0x1e7/0x20d

[<ffffffff81460926>] ? klist_next+0x1f/0xa5

[<ffffffff81144ded>] ? sys_mount+0xab/0xbd

[<ffffffff81475ea8>] ? _read_unlock+0x2b/0x30

[<ffffffff819af25e>] mount_block_root+0x258/0x283

[<ffffffff819af2df>] mount_root+0x56/0x5a

[<ffffffff819af453>] prepare_namespace+0x170/0x19d

[<ffffffff819ae9a7>] kernel_init+0x1b8/0x1cc

[<ffffffff81013eaa>] child_rip+0xa/0x20

[<ffffffff8104edcf>] ? finish_task_switch+0x0/0xcc

[<ffffffff81013810>] ? restore_args+0x0/0x30

[<ffffffff8108ae5b>] ? trace_hardirqs_off_caller+0x2f/0x89

[<ffffffff81013ea0>] ? child_rip+0x0/0x20


On Wed, Apr 14, 2010 at 10:58 AM, Jeremy Fitzhardinge <jeremy@goop.org>wrote:

> On 04/09/2010 04:13 PM, kishore kumar wrote:
> > How do I  build Dom U kernel??
>
> Your dom0 kernel will also boot as domU (either PV or HVM).
>
>    J
>

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Re: [Xen-devel] Xen Dom U kernel

[Pasi Kärkkäinen]

On Fri, Apr 16, 2010 at 03:24:53PM -0700, kishore kumar wrote:
>    I am using my Dom 0 kernel to boot as my Dom U.
>    I edited /etc/xen/xmexample1 file and modified only below lines
> 
>    kernel="/boot/vmlinux-2.6.32.10"
>    memory=512
>    vcpus=5
>    root = "/dev/VolGroup01/LogVol00 ro"
>    Below is the output I pasted after freezing.  Not sure what is wrong.  Can
>    you please help me here??
>    I doubt if I have provided the correct root option?
> 

I bet that kernel has xen block frontend driver as a module? 

You don't seem to have ramdisk/initrd image, 
so you simply don't have the driver loaded at all
to access the root disk in the guest.

You must create an initrd image that loads the driver module in the guest.

> 
>    VFS: Cannot open root device "VolGroup01/LogVol00" or unknown-block(0,0)
> 
>    Please append a correct "root=" boot option; here are the available
>    partitions:
> 
>    Kernel panic - not syncing: VFS: Unable to mount root fs on
>    unknown-block(0,0)
> 

Root was not found - this is usually because you don't have the xen blockdev frontend driver loaded.

-- Pasi

Re: [Xen-devel] Xen Dom U kernel

[kishore kumar]

[-- Attachment #1.1: Type: text/plain, Size: 4291 bytes --]

I included
kernel = "/boot/vmlinuz-2.6.32.10"
ramdisk = "/boot/initrd-2.6.32.10.img" (This is the same as my Dom 0.  As I
am trying to boot the same Dom 0 as my Dom U without any changes)
disk = ['phy:sda2,sda2,w']
root= "/dev/VolGroup01/LogVol00 ro"

  I see my .config and I have
CONFIG_XEN_BLKDEV_FRONTEND=m
CONFIG_XEN_BLKDEV_BACKEND=y
CONFIG_XEN_BACKEND=y

Below is the output pasted.  Any help please on what is going wrong here?

XENBUS: Device with no driver: device/vbd/2050

XENBUS: Device with no driver: device/vif/0

XENBUS: Device with no driver: device/console/0

Magic number: 1:252:3141

drivers/rtc/hctosys.c: unable to open rtc device (rtc0)

Initalizing network drop monitor service

Freeing unused kernel memory: 3392k freed

Write protecting the kernel read-only data: 6912k

Red Hat nash version 5.1.19.6 starting

Mounting proc filesystem

Mounting sysfs filesystem

Creating /dev

Creating initial device nodes

Setting up hotplug.

Creating block device nodes.

Loading ehci-hcd.ko module

ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver

insmod used greatest stack depth: 5712 bytes left

Loading ssb.ko module

Loading ohci-hcd.ko module

ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver

Loading uhci-hcd.ko module

uhci_hcd: USB Universal Host Controller Interface driver

Scanning and configuring dmraid supported devices

Scanning logical volumes

Reading all physical volumes. This may take a while...

lvm used greatest stack depth: 5328 bytes left

Activating logical volumes

Volume group "VolGroup01" not found

Trying to resume from /dev/VolGroup01/LogVol01

Unable to access resume device (/dev/VolGroup01/LogVol01)

Creating root device.

Mounting root filesystem.

mount: could not find filesystem '/dev/root'

Setting up other filesystems.

Setting up new root fs

setuproot: moving /dev failed: No such file or directory

no fstab.sys, mounting internal defaults

setuproot: error mounting /proc: No such file or directory

setuproot: error mounting /sys: No such file or directory

Switching to new root and running init.

unmounting old /dev

unmounting old /proc

unmounting old /sys

switchroot: mount failed: No such file or directory

init used greatest stack depth: 4888 bytes left

Kernel panic - not syncing: Attempted to kill init!

Pid: 1, comm: init Not tainted 2.6.32.10 #2

Call Trace:

[<ffffffff8105b747>] panic+0xa5/0x167

[<ffffffff8100ed81>] ? xen_force_evtchn_callback+0xd/0xf

[<ffffffff81475d48>] ? _write_unlock_irq+0x30/0x3c

[<ffffffff8108c9f4>] ? trace_hardirqs_on_caller+0x110/0x134

[<ffffffff8108ca25>] ? trace_hardirqs_on+0xd/0xf

[<ffffffff81475d4f>] ? _write_unlock_irq+0x37/0x3c

[<ffffffff8105efa7>] do_exit+0x7e/0x701

[<ffffffff8105f6c6>] sys_exit_group+0x0/0x1b

[<ffffffff8105f6dd>] sys_exit_group+0x17/0x1b

[<ffffffff81012d72>] system_call_fastpath+0x16/0x1b

On Sat, Apr 17, 2010 at 5:22 AM, Pasi Kärkkäinen <pasik@iki.fi> wrote:

> On Fri, Apr 16, 2010 at 03:24:53PM -0700, kishore kumar wrote:
> >    I am using my Dom 0 kernel to boot as my Dom U.
> >    I edited /etc/xen/xmexample1 file and modified only below lines
> >
> >    kernel="/boot/vmlinux-2.6.32.10"
> >    memory=512
> >    vcpus=5
> >    root = "/dev/VolGroup01/LogVol00 ro"
> >    Below is the output I pasted after freezing.  Not sure what is wrong.
>  Can
> >    you please help me here??
> >    I doubt if I have provided the correct root option?
> >
>
> I bet that kernel has xen block frontend driver as a module?
>
> You don't seem to have ramdisk/initrd image,
> so you simply don't have the driver loaded at all
> to access the root disk in the guest.
>
> You must create an initrd image that loads the driver module in the guest.
>
> >
> >    VFS: Cannot open root device "VolGroup01/LogVol00" or
> unknown-block(0,0)
> >
> >    Please append a correct "root=" boot option; here are the available
> >    partitions:
> >
> >    Kernel panic - not syncing: VFS: Unable to mount root fs on
> >    unknown-block(0,0)
> >
>
> Root was not found - this is usually because you don't have the xen
> blockdev frontend driver loaded.
>
> -- Pasi
>
>

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Re: Xen Dom U kernel

[Pasi Kärkkäinen]

On Mon, Apr 19, 2010 at 12:08:35PM -0700, kishore kumar wrote:
>    I included
>    kernel = "/boot/vmlinuz-2.6.32.10"
>    ramdisk = "/boot/initrd-2.6.32.10.img" (This is the same as my Dom 0.  As
>    I am trying to boot the same Dom 0 as my Dom U without any changes)
>

You cannot use the dom0 initrd/ramdisk for domU!

dom0 initrd contains drivers for the physical hardware, while in the domU initrd
you need to have drivers for the _virtual_ hardware!

In the log below root was not found because the drivers for the xen block devices
are not loaded.

-- Pasi


>    disk = ['phy:sda2,sda2,w']
>    root= "/dev/VolGroup01/LogVol00 ro"
> 
>      I see my .config and I have
>    CONFIG_XEN_BLKDEV_FRONTEND=m
>    CONFIG_XEN_BLKDEV_BACKEND=y
>    CONFIG_XEN_BACKEND=y
> 
>    Below is the output pasted.  Any help please on what is going wrong here?
> 
>    XENBUS: Device with no driver: device/vbd/2050
> 
>    XENBUS: Device with no driver: device/vif/0
> 
>    XENBUS: Device with no driver: device/console/0
> 
>    Magic number: 1:252:3141
> 
>    drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
> 
>    Initalizing network drop monitor service
> 
>    Freeing unused kernel memory: 3392k freed
> 
>    Write protecting the kernel read-only data: 6912k
> 
>    Red Hat nash version 5.1.19.6 starting
> 
>    Mounting proc filesystem
> 
>    Mounting sysfs filesystem
> 
>    Creating /dev
> 
>    Creating initial device nodes
> 
>    Setting up hotplug.
> 
>    Creating block device nodes.
> 
>    Loading ehci-hcd.ko module
> 
>    ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
> 
>    insmod used greatest stack depth: 5712 bytes left
> 
>    Loading ssb.ko module
> 
>    Loading ohci-hcd.ko module
> 
>    ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
> 
>    Loading uhci-hcd.ko module
> 
>    uhci_hcd: USB Universal Host Controller Interface driver
> 
>    Scanning and configuring dmraid supported devices
> 
>    Scanning logical volumes
> 
>    Reading all physical volumes. This may take a while...
> 
>    lvm used greatest stack depth: 5328 bytes left
> 
>    Activating logical volumes
> 
>    Volume group "VolGroup01" not found
> 
>    Trying to resume from /dev/VolGroup01/LogVol01
> 
>    Unable to access resume device (/dev/VolGroup01/LogVol01)
> 
>    Creating root device.
> 
>    Mounting root filesystem.
> 
>    mount: could not find filesystem '/dev/root'
> 
>    Setting up other filesystems.
> 
>    Setting up new root fs
> 
>    setuproot: moving /dev failed: No such file or directory
> 
>    no fstab.sys, mounting internal defaults
> 
>    setuproot: error mounting /proc: No such file or directory
> 
>    setuproot: error mounting /sys: No such file or directory
> 
>    Switching to new root and running init.
> 
>    unmounting old /dev
> 
>    unmounting old /proc
> 
>    unmounting old /sys
> 
>    switchroot: mount failed: No such file or directory
> 
>    init used greatest stack depth: 4888 bytes left
> 
>    Kernel panic - not syncing: Attempted to kill init!
> 
>    Pid: 1, comm: init Not tainted 2.6.32.10 #2
> 
>    Call Trace:
> 
>    [<ffffffff8105b747>] panic+0xa5/0x167
> 
>    [<ffffffff8100ed81>] ? xen_force_evtchn_callback+0xd/0xf
> 
>    [<ffffffff81475d48>] ? _write_unlock_irq+0x30/0x3c
> 
>    [<ffffffff8108c9f4>] ? trace_hardirqs_on_caller+0x110/0x134
> 
>    [<ffffffff8108ca25>] ? trace_hardirqs_on+0xd/0xf
> 
>    [<ffffffff81475d4f>] ? _write_unlock_irq+0x37/0x3c
> 
>    [<ffffffff8105efa7>] do_exit+0x7e/0x701
> 
>    [<ffffffff8105f6c6>] sys_exit_group+0x0/0x1b
> 
>    [<ffffffff8105f6dd>] sys_exit_group+0x17/0x1b
> 
>    [<ffffffff81012d72>] system_call_fastpath+0x16/0x1b
> 
>    On Sat, Apr 17, 2010 at 5:22 AM, Pasi Kärkkäinen <[1]pasik@iki.fi> wrote:
> 
>      On Fri, Apr 16, 2010 at 03:24:53PM -0700, kishore kumar wrote:
>      >    I am using my Dom 0 kernel to boot as my Dom U.
>      >    I edited /etc/xen/xmexample1 file and modified only below lines
>      >
>      >    kernel="/boot/vmlinux-2.6.32.10"
>      >    memory=512
>      >    vcpus=5
>      >    root = "/dev/VolGroup01/LogVol00 ro"
>      >    Below is the output I pasted after freezing.  Not sure what is
>      wrong.  Can
>      >    you please help me here??
>      >    I doubt if I have provided the correct root option?
>      >
> 
>      I bet that kernel has xen block frontend driver as a module?
> 
>      You don't seem to have ramdisk/initrd image,
>      so you simply don't have the driver loaded at all
>      to access the root disk in the guest.
> 
>      You must create an initrd image that loads the driver module in the
>      guest.
>      >
>      >    VFS: Cannot open root device "VolGroup01/LogVol00" or
>      unknown-block(0,0)
>      >
>      >    Please append a correct "root=" boot option; here are the available
>      >    partitions:
>      >
>      >    Kernel panic - not syncing: VFS: Unable to mount root fs on
>      >    unknown-block(0,0)
>      >
> 
>      Root was not found - this is usually because you don't have the xen
>      blockdev frontend driver loaded.
>      -- Pasi
> 
> References
> 
>    Visible links
>    1. mailto:pasik@iki.fi

Re: Xen Dom U kernel

[listmail]

I don't have any issues using my dom0 kernel & initrd to boot pv domU,  
config has CONFIG_XEN_BLKDEV_FRONTEND=m as well.

However, thats when passing through file based images & LVM from the 
dom0 to the domU.  Is this more of an issue when LVM is implemented on 
the domU itself???  That's what I am seeing here.  Should he be adding a 
break=premount option to initrd and checking visibility of the LVM root 
from busybox?


Pasi Kärkkäinen wrote:
> On Mon, Apr 19, 2010 at 12:08:35PM -0700, kishore kumar wrote:
>   
>>    I included
>>    kernel = "/boot/vmlinuz-2.6.32.10"
>>    ramdisk = "/boot/initrd-2.6.32.10.img" (This is the same as my Dom 0.  As
>>    I am trying to boot the same Dom 0 as my Dom U without any changes)
>>
>>     
>
> You cannot use the dom0 initrd/ramdisk for domU!
>
> dom0 initrd contains drivers for the physical hardware, while in the domU initrd
> you need to have drivers for the _virtual_ hardware!
>
> In the log below root was not found because the drivers for the xen block devices
> are not loaded.
>
> -- Pasi
>
>
>   
>>    disk = ['phy:sda2,sda2,w']
>>    root= "/dev/VolGroup01/LogVol00 ro"
>>
>>      I see my .config and I have
>>    CONFIG_XEN_BLKDEV_FRONTEND=m
>>    CONFIG_XEN_BLKDEV_BACKEND=y
>>    CONFIG_XEN_BACKEND=y
>>
>>    Below is the output pasted.  Any help please on what is going wrong here?
>>
>>    XENBUS: Device with no driver: device/vbd/2050
>>
>>    XENBUS: Device with no driver: device/vif/0
>>
>>    XENBUS: Device with no driver: device/console/0
>>
>>    Magic number: 1:252:3141
>>
>>    drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
>>
>>    Initalizing network drop monitor service
>>
>>    Freeing unused kernel memory: 3392k freed
>>
>>    Write protecting the kernel read-only data: 6912k
>>
>>    Red Hat nash version 5.1.19.6 starting
>>
>>    Mounting proc filesystem
>>
>>    Mounting sysfs filesystem
>>
>>    Creating /dev
>>
>>    Creating initial device nodes
>>
>>    Setting up hotplug.
>>
>>    Creating block device nodes.
>>
>>    Loading ehci-hcd.ko module
>>
>>    ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
>>
>>    insmod used greatest stack depth: 5712 bytes left
>>
>>    Loading ssb.ko module
>>
>>    Loading ohci-hcd.ko module
>>
>>    ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
>>
>>    Loading uhci-hcd.ko module
>>
>>    uhci_hcd: USB Universal Host Controller Interface driver
>>
>>    Scanning and configuring dmraid supported devices
>>
>>    Scanning logical volumes
>>
>>    Reading all physical volumes. This may take a while...
>>
>>    lvm used greatest stack depth: 5328 bytes left
>>
>>    Activating logical volumes
>>
>>    Volume group "VolGroup01" not found
>>
>>    Trying to resume from /dev/VolGroup01/LogVol01
>>
>>    Unable to access resume device (/dev/VolGroup01/LogVol01)
>>
>>    Creating root device.
>>
>>    Mounting root filesystem.
>>
>>    mount: could not find filesystem '/dev/root'
>>
>>    Setting up other filesystems.
>>
>>    Setting up new root fs
>>
>>    setuproot: moving /dev failed: No such file or directory
>>
>>    no fstab.sys, mounting internal defaults
>>
>>    setuproot: error mounting /proc: No such file or directory
>>
>>    setuproot: error mounting /sys: No such file or directory
>>
>>    Switching to new root and running init.
>>
>>    unmounting old /dev
>>
>>    unmounting old /proc
>>
>>    unmounting old /sys
>>
>>    switchroot: mount failed: No such file or directory
>>
>>    init used greatest stack depth: 4888 bytes left
>>
>>    Kernel panic - not syncing: Attempted to kill init!
>>
>>    Pid: 1, comm: init Not tainted 2.6.32.10 #2
>>
>>    Call Trace:
>>
>>    [<ffffffff8105b747>] panic+0xa5/0x167
>>
>>    [<ffffffff8100ed81>] ? xen_force_evtchn_callback+0xd/0xf
>>
>>    [<ffffffff81475d48>] ? _write_unlock_irq+0x30/0x3c
>>
>>    [<ffffffff8108c9f4>] ? trace_hardirqs_on_caller+0x110/0x134
>>
>>    [<ffffffff8108ca25>] ? trace_hardirqs_on+0xd/0xf
>>
>>    [<ffffffff81475d4f>] ? _write_unlock_irq+0x37/0x3c
>>
>>    [<ffffffff8105efa7>] do_exit+0x7e/0x701
>>
>>    [<ffffffff8105f6c6>] sys_exit_group+0x0/0x1b
>>
>>    [<ffffffff8105f6dd>] sys_exit_group+0x17/0x1b
>>
>>    [<ffffffff81012d72>] system_call_fastpath+0x16/0x1b
>>
>>    On Sat, Apr 17, 2010 at 5:22 AM, Pasi Kärkkäinen <[1]pasik@iki.fi> wrote:
>>
>>      On Fri, Apr 16, 2010 at 03:24:53PM -0700, kishore kumar wrote:
>>      >    I am using my Dom 0 kernel to boot as my Dom U.
>>      >    I edited /etc/xen/xmexample1 file and modified only below lines
>>      >
>>      >    kernel="/boot/vmlinux-2.6.32.10"
>>      >    memory=512
>>      >    vcpus=5
>>      >    root = "/dev/VolGroup01/LogVol00 ro"
>>      >    Below is the output I pasted after freezing.  Not sure what is
>>      wrong.  Can
>>      >    you please help me here??
>>      >    I doubt if I have provided the correct root option?
>>      >
>>
>>      I bet that kernel has xen block frontend driver as a module?
>>
>>      You don't seem to have ramdisk/initrd image,
>>      so you simply don't have the driver loaded at all
>>      to access the root disk in the guest.
>>
>>      You must create an initrd image that loads the driver module in the
>>      guest.
>>      >
>>      >    VFS: Cannot open root device "VolGroup01/LogVol00" or
>>      unknown-block(0,0)
>>      >
>>      >    Please append a correct "root=" boot option; here are the available
>>      >    partitions:
>>      >
>>      >    Kernel panic - not syncing: VFS: Unable to mount root fs on
>>      >    unknown-block(0,0)
>>      >
>>
>>      Root was not found - this is usually because you don't have the xen
>>      blockdev frontend driver loaded.
>>      -- Pasi
>>
>> References
>>
>>    Visible links
>>    1. mailto:pasik@iki.fi
>>     
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel
>   

Re: Xen Dom U kernel

[kishore kumar]

[-- Attachment #1.1: Type: text/plain, Size: 6615 bytes --]

Could you please let me know where this break=premount option should be
added?
What is the location of the xen block devices. I want to load this module
and check giving the above option and see if it works for me.
Thank You.

On Mon, Apr 19, 2010 at 2:29 PM, listmail <listmail@triad.rr.com> wrote:

> I don't have any issues using my dom0 kernel & initrd to boot pv domU,
>  config has CONFIG_XEN_BLKDEV_FRONTEND=m as well.
>
> However, thats when passing through file based images & LVM from the dom0
> to the domU.  Is this more of an issue when LVM is implemented on the domU
> itself???  That's what I am seeing here.  Should he be adding a
> break=premount option to initrd and checking visibility of the LVM root from
> busybox?
>
>
> Pasi Kärkkäinen wrote:
>
>>  On Mon, Apr 19, 2010 at 12:08:35PM -0700, kishore kumar wrote:
>>
>>
>>>   I included
>>>   kernel = "/boot/vmlinuz-2.6.32.10"
>>>   ramdisk = "/boot/initrd-2.6.32.10.img" (This is the same as my Dom 0.
>>>  As
>>>   I am trying to boot the same Dom 0 as my Dom U without any changes)
>>>
>>>
>>>
>>
>> You cannot use the dom0 initrd/ramdisk for domU!
>>
>> dom0 initrd contains drivers for the physical hardware, while in the domU
>> initrd
>> you need to have drivers for the _virtual_ hardware!
>>
>> In the log below root was not found because the drivers for the xen block
>> devices
>> are not loaded.
>>
>> -- Pasi
>>
>>
>>
>>
>>>   disk = ['phy:sda2,sda2,w']
>>>   root= "/dev/VolGroup01/LogVol00 ro"
>>>
>>>     I see my .config and I have
>>>   CONFIG_XEN_BLKDEV_FRONTEND=m
>>>   CONFIG_XEN_BLKDEV_BACKEND=y
>>>   CONFIG_XEN_BACKEND=y
>>>
>>>   Below is the output pasted.  Any help please on what is going wrong
>>> here?
>>>
>>>   XENBUS: Device with no driver: device/vbd/2050
>>>
>>>   XENBUS: Device with no driver: device/vif/0
>>>
>>>   XENBUS: Device with no driver: device/console/0
>>>
>>>   Magic number: 1:252:3141
>>>
>>>   drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
>>>
>>>   Initalizing network drop monitor service
>>>
>>>   Freeing unused kernel memory: 3392k freed
>>>
>>>   Write protecting the kernel read-only data: 6912k
>>>
>>>   Red Hat nash version 5.1.19.6 starting
>>>
>>>   Mounting proc filesystem
>>>
>>>   Mounting sysfs filesystem
>>>
>>>   Creating /dev
>>>
>>>   Creating initial device nodes
>>>
>>>   Setting up hotplug.
>>>
>>>   Creating block device nodes.
>>>
>>>   Loading ehci-hcd.ko module
>>>
>>>   ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
>>>
>>>   insmod used greatest stack depth: 5712 bytes left
>>>
>>>   Loading ssb.ko module
>>>
>>>   Loading ohci-hcd.ko module
>>>
>>>   ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
>>>
>>>   Loading uhci-hcd.ko module
>>>
>>>   uhci_hcd: USB Universal Host Controller Interface driver
>>>
>>>   Scanning and configuring dmraid supported devices
>>>
>>>   Scanning logical volumes
>>>
>>>   Reading all physical volumes. This may take a while...
>>>
>>>   lvm used greatest stack depth: 5328 bytes left
>>>
>>>   Activating logical volumes
>>>
>>>   Volume group "VolGroup01" not found
>>>
>>>   Trying to resume from /dev/VolGroup01/LogVol01
>>>
>>>   Unable to access resume device (/dev/VolGroup01/LogVol01)
>>>
>>>   Creating root device.
>>>
>>>   Mounting root filesystem.
>>>
>>>   mount: could not find filesystem '/dev/root'
>>>
>>>   Setting up other filesystems.
>>>
>>>   Setting up new root fs
>>>
>>>   setuproot: moving /dev failed: No such file or directory
>>>
>>>   no fstab.sys, mounting internal defaults
>>>
>>>   setuproot: error mounting /proc: No such file or directory
>>>
>>>   setuproot: error mounting /sys: No such file or directory
>>>
>>>   Switching to new root and running init.
>>>
>>>   unmounting old /dev
>>>
>>>   unmounting old /proc
>>>
>>>   unmounting old /sys
>>>
>>>   switchroot: mount failed: No such file or directory
>>>
>>>   init used greatest stack depth: 4888 bytes left
>>>
>>>   Kernel panic - not syncing: Attempted to kill init!
>>>
>>>   Pid: 1, comm: init Not tainted 2.6.32.10 #2
>>>
>>>   Call Trace:
>>>
>>>   [<ffffffff8105b747>] panic+0xa5/0x167
>>>
>>>   [<ffffffff8100ed81>] ? xen_force_evtchn_callback+0xd/0xf
>>>
>>>   [<ffffffff81475d48>] ? _write_unlock_irq+0x30/0x3c
>>>
>>>   [<ffffffff8108c9f4>] ? trace_hardirqs_on_caller+0x110/0x134
>>>
>>>   [<ffffffff8108ca25>] ? trace_hardirqs_on+0xd/0xf
>>>
>>>   [<ffffffff81475d4f>] ? _write_unlock_irq+0x37/0x3c
>>>
>>>   [<ffffffff8105efa7>] do_exit+0x7e/0x701
>>>
>>>   [<ffffffff8105f6c6>] sys_exit_group+0x0/0x1b
>>>
>>>   [<ffffffff8105f6dd>] sys_exit_group+0x17/0x1b
>>>
>>>   [<ffffffff81012d72>] system_call_fastpath+0x16/0x1b
>>>
>>>   On Sat, Apr 17, 2010 at 5:22 AM, Pasi Kärkkäinen <[1]pasik@iki.fi>
>>> wrote:
>>>
>>>     On Fri, Apr 16, 2010 at 03:24:53PM -0700, kishore kumar wrote:
>>>     >    I am using my Dom 0 kernel to boot as my Dom U.
>>>     >    I edited /etc/xen/xmexample1 file and modified only below lines
>>>     >
>>>     >    kernel="/boot/vmlinux-2.6.32.10"
>>>     >    memory=512
>>>     >    vcpus=5
>>>     >    root = "/dev/VolGroup01/LogVol00 ro"
>>>     >    Below is the output I pasted after freezing.  Not sure what is
>>>     wrong.  Can
>>>     >    you please help me here??
>>>     >    I doubt if I have provided the correct root option?
>>>     >
>>>
>>>     I bet that kernel has xen block frontend driver as a module?
>>>
>>>     You don't seem to have ramdisk/initrd image,
>>>     so you simply don't have the driver loaded at all
>>>     to access the root disk in the guest.
>>>
>>>     You must create an initrd image that loads the driver module in the
>>>     guest.
>>>     >
>>>     >    VFS: Cannot open root device "VolGroup01/LogVol00" or
>>>     unknown-block(0,0)
>>>     >
>>>     >    Please append a correct "root=" boot option; here are the
>>> available
>>>     >    partitions:
>>>     >
>>>     >    Kernel panic - not syncing: VFS: Unable to mount root fs on
>>>     >    unknown-block(0,0)
>>>     >
>>>
>>>     Root was not found - this is usually because you don't have the xen
>>>     blockdev frontend driver loaded.
>>>     -- Pasi
>>>
>>> References
>>>
>>>   Visible links
>>>   1. mailto:pasik@iki.fi
>>>
>>>
>>
>> _______________________________________________
>> Xen-devel mailing list
>>
>> Xen-devel@lists.xensource.com
>> http://lists.xensource.com/xen-devel
>>
>>
>
>

[-- Attachment #1.2: Type: text/html, Size: 7588 bytes --]

[-- Attachment #2: Type: text/plain, Size: 138 bytes --]

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xensource.com
http://lists.xensource.com/xen-devel

Re: Xen Dom U kernel

[listmail]

I am relatively new to lvm and xen in general that's why I posed my 
response as questions :)

If what I have suggested *is* your issue then perhaps you should ensure 
that you already have lvm2 installed on dom0, and assuming the 
appropriate initramfs lvm hooks were created upon installation, then 
rebuild the initrd with update-initramfs -c -k <verson> so that the 
initrd you are using (from dom0) has the capability to handle lvm.

Beyond that, I really do not know whether using ramdisk = 
"/boot/initrd-2.6.32.10.img break=premount" in your pvm config would be 
a viable way to pass the parameter to initrd or not.


kishore kumar wrote:
>  
> Could you please let me know where this break=premount option should 
> be added?
> What is the location of the xen block devices. I want to load this 
> module and check giving the above option and see if it works for me. 
> Thank You.
>  
> On Mon, Apr 19, 2010 at 2:29 PM, listmail <listmail@triad.rr.com 
> <mailto:listmail@triad.rr.com>> wrote:
>
>     I don't have any issues using my dom0 kernel & initrd to boot pv
>     domU,  config has CONFIG_XEN_BLKDEV_FRONTEND=m as well.
>
>     However, thats when passing through file based images & LVM from
>     the dom0 to the domU.  Is this more of an issue when LVM is
>     implemented on the domU itself???  That's what I am seeing here.
>      Should he be adding a break=premount option to initrd and
>     checking visibility of the LVM root from busybox?
>
>
>     Pasi Kärkkäinen wrote:
>
>         On Mon, Apr 19, 2010 at 12:08:35PM -0700, kishore kumar wrote:
>          
>
>               I included
>               kernel = "/boot/vmlinuz-2.6.32.10"
>               ramdisk = "/boot/initrd-2.6.32.10.img" (This is the same
>             as my Dom 0.  As
>               I am trying to boot the same Dom 0 as my Dom U without
>             any changes)
>
>                
>
>
>         You cannot use the dom0 initrd/ramdisk for domU!
>
>         dom0 initrd contains drivers for the physical hardware, while
>         in the domU initrd
>         you need to have drivers for the _virtual_ hardware!
>
>         In the log below root was not found because the drivers for
>         the xen block devices
>         are not loaded.
>
>         -- Pasi
>
>
>          
>
>               disk = ['phy:sda2,sda2,w']
>               root= "/dev/VolGroup01/LogVol00 ro"
>
>                 I see my .config and I have
>               CONFIG_XEN_BLKDEV_FRONTEND=m
>               CONFIG_XEN_BLKDEV_BACKEND=y
>               CONFIG_XEN_BACKEND=y
>
>               Below is the output pasted.  Any help please on what is
>             going wrong here?
>
>               XENBUS: Device with no driver: device/vbd/2050
>
>               XENBUS: Device with no driver: device/vif/0
>
>               XENBUS: Device with no driver: device/console/0
>
>               Magic number: 1:252:3141
>
>               drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
>
>               Initalizing network drop monitor service
>
>               Freeing unused kernel memory: 3392k freed
>
>               Write protecting the kernel read-only data: 6912k
>
>               Red Hat nash version 5.1.19.6 starting
>
>               Mounting proc filesystem
>
>               Mounting sysfs filesystem
>
>               Creating /dev
>
>               Creating initial device nodes
>
>               Setting up hotplug.
>
>               Creating block device nodes.
>
>               Loading ehci-hcd.ko module
>
>               ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
>
>               insmod used greatest stack depth: 5712 bytes left
>
>               Loading ssb.ko module
>
>               Loading ohci-hcd.ko module
>
>               ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
>
>               Loading uhci-hcd.ko module
>
>               uhci_hcd: USB Universal Host Controller Interface driver
>
>               Scanning and configuring dmraid supported devices
>
>               Scanning logical volumes
>
>               Reading all physical volumes. This may take a while...
>
>               lvm used greatest stack depth: 5328 bytes left
>
>               Activating logical volumes
>
>               Volume group "VolGroup01" not found
>
>               Trying to resume from /dev/VolGroup01/LogVol01
>
>               Unable to access resume device (/dev/VolGroup01/LogVol01)
>
>               Creating root device.
>
>               Mounting root filesystem.
>
>               mount: could not find filesystem '/dev/root'
>
>               Setting up other filesystems.
>
>               Setting up new root fs
>
>               setuproot: moving /dev failed: No such file or directory
>
>               no fstab.sys, mounting internal defaults
>
>               setuproot: error mounting /proc: No such file or directory
>
>               setuproot: error mounting /sys: No such file or directory
>
>               Switching to new root and running init.
>
>               unmounting old /dev
>
>               unmounting old /proc
>
>               unmounting old /sys
>
>               switchroot: mount failed: No such file or directory
>
>               init used greatest stack depth: 4888 bytes left
>
>               Kernel panic - not syncing: Attempted to kill init!
>
>               Pid: 1, comm: init Not tainted 2.6.32.10 #2
>
>               Call Trace:
>
>               [<ffffffff8105b747>] panic+0xa5/0x167
>
>               [<ffffffff8100ed81>] ? xen_force_evtchn_callback+0xd/0xf
>
>               [<ffffffff81475d48>] ? _write_unlock_irq+0x30/0x3c
>
>               [<ffffffff8108c9f4>] ? trace_hardirqs_on_caller+0x110/0x134
>
>               [<ffffffff8108ca25>] ? trace_hardirqs_on+0xd/0xf
>
>               [<ffffffff81475d4f>] ? _write_unlock_irq+0x37/0x3c
>
>               [<ffffffff8105efa7>] do_exit+0x7e/0x701
>
>               [<ffffffff8105f6c6>] sys_exit_group+0x0/0x1b
>
>               [<ffffffff8105f6dd>] sys_exit_group+0x17/0x1b
>
>               [<ffffffff81012d72>] system_call_fastpath+0x16/0x1b
>
>               On Sat, Apr 17, 2010 at 5:22 AM, Pasi Kärkkäinen
>             <[1]pasik@iki.fi <mailto:pasik@iki.fi>> wrote:
>
>                 On Fri, Apr 16, 2010 at 03:24:53PM -0700, kishore
>             kumar wrote:
>                 >    I am using my Dom 0 kernel to boot as my Dom U.
>                 >    I edited /etc/xen/xmexample1 file and modified
>             only below lines
>                 >
>                 >    kernel="/boot/vmlinux-2.6.32.10"
>                 >    memory=512
>                 >    vcpus=5
>                 >    root = "/dev/VolGroup01/LogVol00 ro"
>                 >    Below is the output I pasted after freezing.  Not
>             sure what is
>                 wrong.  Can
>                 >    you please help me here??
>                 >    I doubt if I have provided the correct root option?
>                 >
>
>                 I bet that kernel has xen block frontend driver as a
>             module?
>
>                 You don't seem to have ramdisk/initrd image,
>                 so you simply don't have the driver loaded at all
>                 to access the root disk in the guest.
>
>                 You must create an initrd image that loads the driver
>             module in the
>                 guest.
>                 >
>                 >    VFS: Cannot open root device "VolGroup01/LogVol00" or
>                 unknown-block(0,0)
>                 >
>                 >    Please append a correct "root=" boot option; here
>             are the available
>                 >    partitions:
>                 >
>                 >    Kernel panic - not syncing: VFS: Unable to mount
>             root fs on
>                 >    unknown-block(0,0)
>                 >
>
>                 Root was not found - this is usually because you don't
>             have the xen
>                 blockdev frontend driver loaded.
>                 -- Pasi
>
>             References
>
>               Visible links
>               1. mailto:pasik@iki.fi <mailto:pasik@iki.fi>
>                
>
>
>         _______________________________________________
>         Xen-devel mailing list
>
>         Xen-devel@lists.xensource.com
>         <mailto:Xen-devel@lists.xensource.com>
>         http://lists.xensource.com/xen-devel
>          
>
>
>

Re: Xen Dom U kernel

[kishore kumar]

[-- Attachment #1.1: Type: text/plain, Size: 19836 bytes --]

I pulled  PV guest dom U kernel from
Konrad's xen.git in git://
git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git
pv/merge.2.6.33
and did
make menuconfig
make
make modules_install install. And below is the output I pasted.

Can you please let me know what went wrong here?


[root@localhost xen]# xm create -c /home/kishore/mar_15/xmexample1

Using config file "/home/kishore/mar_15/xmexample1".

Started domain Kishore_DomainU (id=1)

Initializing cgroup subsys cpuset

Initializing cgroup subsys cpu

Linux version 2.6.33 (kishore@localhost.localdomain) (gcc version 4.1.2
20080704 (Red Hat 4.1.2-46)) #1 SMP Tue Apr 20 13:14:56 PDT 2010

Command line: root=/volGroup01/Logvol00 ro ip=:127.0.255.255::::eth0:dhcp 4

ACPI in unprivileged domain disabled

BIOS-provided physical RAM map:

Xen: 0000000000000000 - 00000000000a0000 (usable)

Xen: 00000000000a0000 - 0000000000100000 (reserved)

Xen: 0000000000100000 - 0000000020000000 (usable)

NX (Execute Disable) protection: active

DMI not present or invalid.

No AGP bridge found

last_pfn = 0x20000 max_arch_pfn = 0x400000000

init_memory_mapping: 0000000000000000-0000000020000000

RAMDISK: 029d4000 - 03008000

No NUMA configuration found

Faking a node at 0000000000000000-0000000020000000

Bootmem setup node 0 0000000000000000-0000000020000000

NODE_DATA [0000000000007000 - 000000000001efff]

bootmap [000000000001f000 - 0000000000022fff] pages 4

(8 early reservations) ==> bootmem [0000000000 - 0020000000]

#0 [0000000000 - 0000001000] BIOS data page ==> [0000000000 - 0000001000]

#1 [000310b000 - 0003128000] XEN PAGETABLES ==> [000310b000 - 0003128000]

#2 [0001000000 - 00029b3878] TEXT DATA BSS ==> [0001000000 - 00029b3878]

#3 [00029d4000 - 0003008000] RAMDISK ==> [00029d4000 - 0003008000]

#4 [0003008000 - 000310b000] XEN START INFO ==> [0003008000 - 000310b000]

#5 [0000001000 - 0000003000] TRAMPOLINE ==> [0000001000 - 0000003000]

#6 [0000003000 - 0000007000] ACPI WAKEUP ==> [0000003000 - 0000007000]

#7 [0000100000 - 00001e2000] PGTABLE ==> [0000100000 - 00001e2000]

Zone PFN ranges:

DMA 0x00000000 -> 0x00001000

DMA32 0x00001000 -> 0x00100000

Normal 0x00100000 -> 0x00100000

Movable zone start PFN for each node

early_node_map[2] active PFN ranges

0: 0x00000000 -> 0x000000a0

0: 0x00000100 -> 0x00020000

SMP: Allowing 5 CPUs, 0 hotplug CPUs

No local APIC present

APIC: disable apic facility

APIC: switched to apic NOOP

PM: Registered nosave memory: 00000000000a0000 - 0000000000100000

Allocating PCI resources starting at 20000000 (gap: 20000000:e0000000)

Booting paravirtualized kernel on Xen

Xen version: 3.4.3-rc4-pre (preserve-AD)

setup_percpu: NR_CPUS:512 nr_cpumask_bits:512 nr_cpu_ids:5 nr_node_ids:1

PERCPU: Embedded 478 pages/cpu @ffff880003c2f000 s1928344 r8192 d21352
u1957888

pcpu-alloc: s1928344 r8192 d21352 u1957888 alloc=478*4096

pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3 [0] 4

Xen: using vcpu_info placement

Built 1 zonelists in Node order, mobility grouping on. Total pages: 128951

Policy zone: DMA32

Kernel command line: root=/volGroup01/Logvol00 ro
ip=:127.0.255.255::::eth0:dhcp
4

PID hash table entries: 2048 (order: 2, 16384 bytes)

Checking aperture...

No AGP bridge found

Memory: 472204k/524288k available (4689k kernel code, 384k absent, 51700k
reserved, 6678k data, 3392k init)

SLUB: Genslabs=14, HWalign=64, Order=0-3, MinObjects=0, CPUs=5, Nodes=1

Hierarchical RCU implementation.

NR_IRQS:4352 nr_irqs:312

Console: colour dummy device 80x25

console [tty0] enabled

console [hvc0] enabled

Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar

... MAX_LOCKDEP_SUBCLASSES: 8

... MAX_LOCK_DEPTH: 48

... MAX_LOCKDEP_KEYS: 8191

... CLASSHASH_SIZE: 4096

... MAX_LOCKDEP_ENTRIES: 16384

... MAX_LOCKDEP_CHAINS: 32768

... CHAINHASH_SIZE: 16384

memory used by lock dependency info: 6367 kB

per task-struct memory footprint: 2688 bytes

allocated 5242880 bytes of page_cgroup

please try 'cgroup_disable=memory' option if you don't want memory cgroups

installing Xen timer for CPU 0

Detected 3200.112 MHz processor.

Calibrating delay loop (skipped), value calculated using timer frequency..
6400.22 BogoMIPS (lpj=3200112)

Security Framework initialized

SELinux: Initializing.

Dentry cache hash table entries: 65536 (order: 7, 524288 bytes)

Inode-cache hash table entries: 32768 (order: 6, 262144 bytes)

Mount-cache hash table entries: 256

Initializing cgroup subsys ns

Initializing cgroup subsys cpuacct

Initializing cgroup subsys memory

Initializing cgroup subsys devices

Initializing cgroup subsys freezer

Initializing cgroup subsys net_cls

CPU: Unsupported number of siblings 32

Performance Events: unsupported p6 CPU model 44 no PMU driver, software
events only.

lockdep: fixing up alternatives.

SMP alternatives: switching to UP code

ftrace: converting mcount calls to 0f 1f 44 00 00

ftrace: allocating 27220 entries in 107 pages

installing Xen timer for CPU 1

lockdep: fixing up alternatives.

SMP alternatives: switching to SMP code

CPU: Unsupported number of siblings 32

installing Xen timer for CPU 2

CPU: Unsupported number of siblings 32

installing Xen timer for CPU 3

CPU: Unsupported number of siblings 32

installing Xen timer for CPU 4

CPU: Unsupported number of siblings 32

Brought up 5 CPUs

Grant table initialized

regulator: core version 0.5

Time: 165:165:165 Date: 165/165/65

NET: Registered protocol family 16

PCI: setting up Xen PCI frontend stub

bio: create slab <bio-0> at 0

ACPI: Interpreter disabled.

xen_balloon: Initialising balloon driver.

vgaarb: loaded

SCSI subsystem initialized

usbcore: registered new interface driver usbfs

usbcore: registered new interface driver hub

usbcore: registered new device driver usb

PCI: System does not support PCI

PCI: System does not support PCI

NetLabel: Initializing

NetLabel: domain hash size = 128

NetLabel: protocols = UNLABELED CIPSOv4

NetLabel: unlabeled traffic allowed by default

Switching to clocksource xen

kstop/0 used greatest stack depth: 6568 bytes left

kstop/1 used greatest stack depth: 6552 bytes left

pnp: PnP ACPI: disabled

NET: Registered protocol family 2

IP route cache hash table entries: 4096 (order: 3, 32768 bytes)

TCP established hash table entries: 16384 (order: 6, 262144 bytes)

TCP bind hash table entries: 16384 (order: 8, 1179648 bytes)

TCP: Hash tables configured (established 16384 bind 16384)

TCP reno registered

UDP hash table entries: 256 (order: 3, 40960 bytes)

UDP-Lite hash table entries: 256 (order: 3, 40960 bytes)

NET: Registered protocol family 1

Trying to unpack rootfs image as initramfs...

Freeing initrd memory: 6352k freed

DMA-API: preallocated 32768 debug entries

DMA-API: debugging enabled by kernel config

platform rtc_cmos: registered platform RTC device (no PNP device found)

audit: initializing netlink socket (disabled)

type=2000 audit(1271770990.281:1): initialized

HugeTLB registered 2 MB page size, pre-allocated 0 pages

VFS: Disk quotas dquot_6.5.2

Dquot-cache hash table entries: 512 (order 0, 4096 bytes)

msgmni has been set to 934

cryptomgr_test used greatest stack depth: 5368 bytes left

alg: No test for stdrng (krng)

Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252)

io scheduler noop registered

io scheduler deadline registered

io scheduler cfq registered (default)

pci_hotplug: PCI Hot Plug PCI Core version: 0.5

pciehp: PCI Express Hot Plug Controller Driver version: 0.4

acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5

pci-stub: invalid id string ""

Non-volatile memory driver v1.3

Linux agpgart interface v0.103

Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled

brd: module loaded

loop: module loaded

input: Macintosh mouse button emulation as /class/input/input0

Fixed MDIO Bus: probed

ixgbe: Intel(R) 10 Gigabit PCI Express Network Driver - version 2.0.44-k2

ixgbe: Copyright (c) 1999-2010 Intel Corporation.

Intel(R) PRO/10GbE Network Driver - version 1.0.135-k2-NAPI

Copyright (c) 1999-2008 Intel Corporation.

Initialising Xen virtual ethernet driver.

ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver

ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver

uhci_hcd: USB Universal Host Controller Interface driver

blkfront: xvda2: barriers enabled

PNP: No PS/2 controller found. Probing ports directly.

i8042.c: No controller found.

mice: PS/2 mouse device common for all mice

rtc_cmos rtc_cmos: rtc core: registered rtc_cmos as rtc0

device-mapper: uevent: version 1.0.3

device-mapper: ioctl: 4.16.0-ioctl (2009-11-05) initialised:
dm-devel@redhat.com

cpuidle: using governor ladder

cpuidle: using governor menu

usbcore: registered new interface driver hiddev

usbcore: registered new interface driver usbhid

usbhid: USB HID core driver

nf_conntrack version 0.5.0 (3738 buckets, 14952 max)

CONFIG_NF_CT_ACCT is deprecated and will be removed soon. Please use

nf_conntrack.acct=1 kernel parameter, acct=1 nf_conntrack module option or

sysctl net.netfilter.nf_conntrack_acct=1 to enable it.

ip_tables: (C) 2000-2006 Netfilter Core Team

TCP cubic registered

Initializing XFRM netlink socket

NET: Registered protocol family 17

registered taskstats version 1

No TPM chip found, activating TPM-bypass!

XENBUS: Device with no driver: device/console/0

Magic number: 1:252:3141

drivers/rtc/hctosys.c: unable to open rtc device (rtc0)

Initalizing network drop monitor service

Freeing unused kernel memory: 3392k freed

Write protecting the kernel read-only data: 10240k

Freeing unused kernel memory: 1436k freed

BUG: unable to handle kernel paging request at ffff880001499000

IP: [<ffffffff8122b8a0>] memset_c+0x20/0x30

PGD 1a44067 PUD 1a48067 PMD 3118067 PTE 10000001499025

Oops: 0003 [#1] SMP

last sysfs file:

CPU 4

Pid: 1, comm: swapper Not tainted 2.6.33 #1 /

RIP: e030:[<ffffffff8122b8a0>] [<ffffffff8122b8a0>] memset_c+0x20/0x30

RSP: e02b:ffff88001fdf7e68 EFLAGS: 00010206

RAX: cccccccccccccccc RBX: ffffea0000000000 RCX: 0000000000000200

RDX: 0000000000000000 RSI: 00000000000000cc RDI: ffff880001499000

RBP: ffff88001fdf7e90 R08: 0000000000000000 R09: ffff880001499000

R10: ffff88001fc04248 R11: ffff88001fdf7ba0 R12: ffff880001499000

R13: ffff880001600000 R14: ffffffff81789ef8 R15: 0000000000000000

FS: 0000000000000000(0000) GS:ffff8800043a7000(0000) knlGS:0000000000000000

CS: e033 DS: 0000 ES: 0000 CR0: 000000008005003b

CR2: ffff880001499000 CR3: 0000000001a43000 CR4: 0000000000002660

DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000

DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400

Process swapper (pid: 1, threadinfo ffff88001fdf6000, task ffff88001fdf8000)

Stack:

ffffffff8102fdda 6db6db6db6db6db7 0000000000000400 ffff880000000000

<0> ffffffff81600000 ffff88001fdf7ec0 ffffffff810305c6 ffffffff81e5d8a0

<0> 0000000000000200 0000000000000200 ffffffff81b12f80 ffff88001fdf7ed0

Call Trace:

[<ffffffff8102fdda>] ? free_init_pages+0xa4/0xca

[<ffffffff810305c6>] mark_rodata_ro+0xea/0x150

[<ffffffff81002200>] init_post+0x30/0x114

[<ffffffff81cf29a8>] kernel_init+0x1be/0x1cd

[<ffffffff8100ab64>] kernel_thread_helper+0x4/0x10

[<ffffffff8148d910>] ? restore_args+0x0/0x30

[<ffffffff8100ab60>] ? kernel_thread_helper+0x0/0x10

Code: 83 f9 ff 75 ed c9 4c 89 c0 c3 90 49 89 f9 41 89 d0 41 83 e0 07 89 d1
c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 f7 e6 <f3> 48 ab 44 89
c1 f3 aa 4c 89 c8 c3 0f 1f 40 00 eb ce 0f 1f 84

RIP [<ffffffff8122b8a0>] memset_c+0x20/0x30

RSP <ffff88001fdf7e68>

CR2: ffff880001499000

---[ end trace 578e9e3c60fdfb1a ]---

swapper used greatest stack depth: 4952 bytes left

Kernel panic - not syncing: Attempted to kill init!

Pid: 1, comm: swapper Tainted: G D 2.6.33 #1

Call Trace:

[<ffffffff812200af>] ? compat_blkdev_driver_ioctl+0x1e2/0xf02

[<ffffffff8105145a>] panic+0xa5/0x171

[<ffffffff81054e15>] ? do_exit+0x325/0x6f5

[<ffffffff81006891>] ? xen_force_evtchn_callback+0xd/0xf

[<ffffffff81054e15>] ? do_exit+0x325/0x6f5

[<ffffffff81054e65>] ? do_exit+0x375/0x6f5

[<ffffffff81054e15>] ? do_exit+0x325/0x6f5

[<ffffffff81006f4f>] ? xen_restore_fl_direct_end+0x0/0x1

[<ffffffff81081534>] ? lock_release+0x182/0x18d

[<ffffffff812200af>] ? compat_blkdev_driver_ioctl+0x1e2/0xf02

[<ffffffff8107ed49>] ? trace_hardirqs_on+0xd/0xf

[<ffffffff8148cefb>] ? _raw_write_unlock_irq+0x37/0x3b

[<ffffffff812200af>] ? compat_blkdev_driver_ioctl+0x1e2/0xf02

[<ffffffff81054b6c>] do_exit+0x7c/0x6f5

[<ffffffff81052cf2>] ? kmsg_dump+0x153/0x183

[<ffffffff812200af>] ? compat_blkdev_driver_ioctl+0x1e2/0xf02

[<ffffffff812200af>] ? compat_blkdev_driver_ioctl+0x1e2/0xf02

[<ffffffff8148e850>] oops_end+0xbf/0xc7

[<ffffffff81030eb2>] no_context+0x1fa/0x209

[<ffffffff812200af>] ? compat_blkdev_driver_ioctl+0x1e2/0xf02

[<ffffffff81004748>] ? xen_pmd_val+0xe/0x10

[<ffffffff81031118>] __bad_area_nosemaphore+0x198/0x1bb

[<ffffffff8148d940>] ? irq_return+0x0/0x10

[<ffffffff810311c5>] bad_area_nosemaphore+0x13/0x15

[<ffffffff81490256>] do_page_fault+0x16d/0x2a2

[<ffffffff8148dbb5>] page_fault+0x25/0x30

[<ffffffff8122b8a0>] ? memset_c+0x20/0x30

[<ffffffff8102fdda>] ? free_init_pages+0xa4/0xca

[<ffffffff810305c6>] mark_rodata_ro+0xea/0x150

[<ffffffff81002200>] init_post+0x30/0x114

[<ffffffff81cf29a8>] kernel_init+0x1be/0x1cd

[<ffffffff8100ab64>] kernel_thread_helper+0x4/0x10

[<ffffffff8148d910>] ? restore_args+0x0/0x30

[<ffffffff8100ab60>] ? kernel_thread_helper+0x0/0x10






On Mon, Apr 19, 2010 at 12:27 PM, Pasi Kärkkäinen <pasik@iki.fi> wrote:

> On Mon, Apr 19, 2010 at 12:08:35PM -0700, kishore kumar wrote:
> >    I included
> >    kernel = "/boot/vmlinuz-2.6.32.10"
> >    ramdisk = "/boot/initrd-2.6.32.10.img" (This is the same as my Dom 0.
>  As
> >    I am trying to boot the same Dom 0 as my Dom U without any changes)
> >
>
> You cannot use the dom0 initrd/ramdisk for domU!
>
> dom0 initrd contains drivers for the physical hardware, while in the domU
> initrd
> you need to have drivers for the _virtual_ hardware!
>
> In the log below root was not found because the drivers for the xen block
> devices
> are not loaded.
>
> -- Pasi
>
>
> >    disk = ['phy:sda2,sda2,w']
> >    root= "/dev/VolGroup01/LogVol00 ro"
> >
> >      I see my .config and I have
> >    CONFIG_XEN_BLKDEV_FRONTEND=m
> >    CONFIG_XEN_BLKDEV_BACKEND=y
> >    CONFIG_XEN_BACKEND=y
> >
> >    Below is the output pasted.  Any help please on what is going wrong
> here?
> >
> >    XENBUS: Device with no driver: device/vbd/2050
> >
> >    XENBUS: Device with no driver: device/vif/0
> >
> >    XENBUS: Device with no driver: device/console/0
> >
> >    Magic number: 1:252:3141
> >
> >    drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
> >
> >    Initalizing network drop monitor service
> >
> >    Freeing unused kernel memory: 3392k freed
> >
> >    Write protecting the kernel read-only data: 6912k
> >
> >    Red Hat nash version 5.1.19.6 starting
> >
> >    Mounting proc filesystem
> >
> >    Mounting sysfs filesystem
> >
> >    Creating /dev
> >
> >    Creating initial device nodes
> >
> >    Setting up hotplug.
> >
> >    Creating block device nodes.
> >
> >    Loading ehci-hcd.ko module
> >
> >    ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
> >
> >    insmod used greatest stack depth: 5712 bytes left
> >
> >    Loading ssb.ko module
> >
> >    Loading ohci-hcd.ko module
> >
> >    ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
> >
> >    Loading uhci-hcd.ko module
> >
> >    uhci_hcd: USB Universal Host Controller Interface driver
> >
> >    Scanning and configuring dmraid supported devices
> >
> >    Scanning logical volumes
> >
> >    Reading all physical volumes. This may take a while...
> >
> >    lvm used greatest stack depth: 5328 bytes left
> >
> >    Activating logical volumes
> >
> >    Volume group "VolGroup01" not found
> >
> >    Trying to resume from /dev/VolGroup01/LogVol01
> >
> >    Unable to access resume device (/dev/VolGroup01/LogVol01)
> >
> >    Creating root device.
> >
> >    Mounting root filesystem.
> >
> >    mount: could not find filesystem '/dev/root'
> >
> >    Setting up other filesystems.
> >
> >    Setting up new root fs
> >
> >    setuproot: moving /dev failed: No such file or directory
> >
> >    no fstab.sys, mounting internal defaults
> >
> >    setuproot: error mounting /proc: No such file or directory
> >
> >    setuproot: error mounting /sys: No such file or directory
> >
> >    Switching to new root and running init.
> >
> >    unmounting old /dev
> >
> >    unmounting old /proc
> >
> >    unmounting old /sys
> >
> >    switchroot: mount failed: No such file or directory
> >
> >    init used greatest stack depth: 4888 bytes left
> >
> >    Kernel panic - not syncing: Attempted to kill init!
> >
> >    Pid: 1, comm: init Not tainted 2.6.32.10 #2
> >
> >    Call Trace:
> >
> >    [<ffffffff8105b747>] panic+0xa5/0x167
> >
> >    [<ffffffff8100ed81>] ? xen_force_evtchn_callback+0xd/0xf
> >
> >    [<ffffffff81475d48>] ? _write_unlock_irq+0x30/0x3c
> >
> >    [<ffffffff8108c9f4>] ? trace_hardirqs_on_caller+0x110/0x134
> >
> >    [<ffffffff8108ca25>] ? trace_hardirqs_on+0xd/0xf
> >
> >    [<ffffffff81475d4f>] ? _write_unlock_irq+0x37/0x3c
> >
> >    [<ffffffff8105efa7>] do_exit+0x7e/0x701
> >
> >    [<ffffffff8105f6c6>] sys_exit_group+0x0/0x1b
> >
> >    [<ffffffff8105f6dd>] sys_exit_group+0x17/0x1b
> >
> >    [<ffffffff81012d72>] system_call_fastpath+0x16/0x1b
> >
>  >    On Sat, Apr 17, 2010 at 5:22 AM, Pasi Kärkkäinen <[1]pasik@iki.fi>
> wrote:
> >
> >      On Fri, Apr 16, 2010 at 03:24:53PM -0700, kishore kumar wrote:
> >      >    I am using my Dom 0 kernel to boot as my Dom U.
> >      >    I edited /etc/xen/xmexample1 file and modified only below lines
> >      >
> >      >    kernel="/boot/vmlinux-2.6.32.10"
> >      >    memory=512
> >      >    vcpus=5
> >      >    root = "/dev/VolGroup01/LogVol00 ro"
> >      >    Below is the output I pasted after freezing.  Not sure what is
> >      wrong.  Can
> >      >    you please help me here??
> >      >    I doubt if I have provided the correct root option?
> >      >
> >
> >      I bet that kernel has xen block frontend driver as a module?
> >
> >      You don't seem to have ramdisk/initrd image,
> >      so you simply don't have the driver loaded at all
> >      to access the root disk in the guest.
> >
> >      You must create an initrd image that loads the driver module in the
> >      guest.
> >      >
> >      >    VFS: Cannot open root device "VolGroup01/LogVol00" or
> >      unknown-block(0,0)
> >      >
> >      >    Please append a correct "root=" boot option; here are the
> available
> >      >    partitions:
> >      >
> >      >    Kernel panic - not syncing: VFS: Unable to mount root fs on
> >      >    unknown-block(0,0)
> >      >
> >
> >      Root was not found - this is usually because you don't have the xen
> >      blockdev frontend driver loaded.
> >      -- Pasi
> >
>  > References
> >
> >    Visible links
> >    1. mailto:pasik@iki.fi
>

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Re: Xen Dom U kernel

[Konrad Rzeszutek Wilk]

On Tue, Apr 20, 2010 at 03:27:56PM -0700, kishore kumar wrote:
> I pulled  PV guest dom U kernel from
> Konrad's xen.git in git://
> git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git
> pv/merge.2.6.33
> and did
> make menuconfig
> make
> make modules_install install. And below is the output I pasted.
> 
> Can you please let me know what went wrong here?

Yeah. I know exactly what is wrong. Let me put the patch in. Thanks for
noticing it. BTW, you can also go around this by having this in your
.config file:
# CONFIG_DEBUG_RODATA_TEST is not set

Re: [Xen-devel] Xen Dom U kernel

[kishore kumar]

[-- Attachment #1.1: Type: text/plain, Size: 825 bytes --]

Is this need to be set to
CONFIG_DEBUG_RODATA_TEST =y or it need to be commented ??
currently i have this
CONFIG_DEBUG_RODATA_TEST=y in my .config
On Tue, Apr 20, 2010 at 3:38 PM, Konrad Rzeszutek Wilk <
konrad.wilk@oracle.com> wrote:

> On Tue, Apr 20, 2010 at 03:27:56PM -0700, kishore kumar wrote:
> > I pulled  PV guest dom U kernel from
> > Konrad's xen.git in git://
> > git.kernel.org/pub/scm/linux/kernel/git/konrad/xen.git
> > pv/merge.2.6.33
> > and did
> > make menuconfig
> > make
> > make modules_install install. And below is the output I pasted.
> >
> > Can you please let me know what went wrong here?
>
> Yeah. I know exactly what is wrong. Let me put the patch in. Thanks for
> noticing it. BTW, you can also go around this by having this in your
> .config file:
> # CONFIG_DEBUG_RODATA_TEST is not set
>
>

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Re: Xen Dom U kernel

[Konrad Rzeszutek Wilk]

On Tue, Apr 20, 2010 at 03:53:41PM -0700, kishore kumar wrote:
> Is this need to be set to
> CONFIG_DEBUG_RODATA_TEST =y or it need to be commented ??
> currently i have this
> CONFIG_DEBUG_RODATA_TEST=y in my .config

No need for it. I've put a patch in the branch. Make sure to do a git
pull and you should get the fix.

Re: [Xen-devel] Xen Dom U kernel

[kishore kumar]

[-- Attachment #1.1: Type: text/plain, Size: 2412 bytes --]

I did git pull and did
make
make modules_install install.
  Is this the problem with xen blkdevices not loaded?  Can you let me know
Where can I find this to load it manually?

Mounting proc filesystem

Mounting sysfs filesystem

Creating /dev

Creating initial device nodes

Setting up hotplug.

Creating block device nodes.

Scanning and configuring dmraid supported devices

Scanning logical volumes

Reading all physical volumes. This may take a while...

Found volume group "VolGroup01" using metadata type lvm2

lvm used greatest stack depth: 4912 bytes left

Activating logical volumes

2 logical volume(s) in volume group "VolGroup01" now active

Trying to resume from /dev/VolGroup01/LogVol01

No suspend signature on swap, not resuming.

Creating root device.

Mounting root filesystem.

mount: could not find filesystem '/dev/root'

Setting up other filesystems.

Setting up new root fs

setuproot: moving /dev failed: No such file or directory

no fstab.sys, mounting internal defaults

setuproot: error mounting /proc: No such file or directory

setuproot: error mounting /sys: No such file or directory

Switching to new root and running init.

unmounting old /dev

unmounting old /proc

unmounting old /sys

switchroot: mount failed: No such file or directory

init used greatest stack depth: 4736 bytes left

Kernel panic - not syncing: Attempted to kill init!

Pid: 1, comm: init Not tainted 2.6.33 #3

Call Trace:

[<ffffffff810513fa>] panic+0xa5/0x171

[<ffffffff81006891>] ? xen_force_evtchn_callback+0xd/0xf

[<ffffffff8148ce94>] ? _raw_write_unlock_irq+0x30/0x3b

[<ffffffff8107ecb8>] ? trace_hardirqs_on_caller+0x110/0x134

[<ffffffff8107ece9>] ? trace_hardirqs_on+0xd/0xf

[<ffffffff8148ce9b>] ? _raw_write_unlock_irq+0x37/0x3b

[<ffffffff81054b0c>] do_exit+0x7c/0x6f5

[<ffffffff8107189f>] ? up_read+0x2b/0x2f

[<ffffffff81055221>] sys_exit_group+0x0/0x1b

[<ffffffff81055238>] sys_exit_group+0x17/0x1b

[<ffffffff81009cf2>] system_call_fastpath+0x16/0x1b



On Tue, Apr 20, 2010 at 4:39 PM, Konrad Rzeszutek Wilk <
konrad.wilk@oracle.com> wrote:

> On Tue, Apr 20, 2010 at 03:53:41PM -0700, kishore kumar wrote:
> > Is this need to be set to
> > CONFIG_DEBUG_RODATA_TEST =y or it need to be commented ??
> > currently i have this
> > CONFIG_DEBUG_RODATA_TEST=y in my .config
>
> No need for it. I've put a patch in the branch. Make sure to do a git
> pull and you should get the fix.
>

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Re: Xen Dom U kernel

[Konrad Rzeszutek Wilk]

On Tue, Apr 20, 2010 at 05:09:29PM -0700, kishore kumar wrote:
> I did git pull and did
> make
> make modules_install install.
>   Is this the problem with xen blkdevices not loaded?  Can you let me know

So now you are hitting another problem. This looks
to be this one:
http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html

Please follow the whole thread and select the right config options.

Re: Xen Dom U kernel

[kishore kumar]

[-- Attachment #1.1: Type: text/plain, Size: 888 bytes --]

I am trying create ramdisk image for my domU image from Konrad git
repository.

mkinitrd --with xenblk --with xennet /boot/initrd-xenu.img  2.6.33
I get No module xenblk found for kernel 2.6.33, aborting.
Can you please let me know what could be the problem??

I have CONFIG_XEN_BLKDEV_FRONTEND=y
CONFIG_XEN_NETDEV_FRONTEND=y in my .config as well.

Thank You.
On Tue, Apr 20, 2010 at 6:45 PM, Konrad Rzeszutek Wilk <
konrad.wilk@oracle.com> wrote:

> On Tue, Apr 20, 2010 at 05:09:29PM -0700, kishore kumar wrote:
> > I did git pull and did
> > make
> > make modules_install install.
> >   Is this the problem with xen blkdevices not loaded?  Can you let me
> know
>
> So now you are hitting another problem. This looks
> to be this one:
> http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
>
> Please follow the whole thread and select the right config options.
>

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Re: Xen Dom U kernel

[Pasi Kärkkäinen]

On Thu, Apr 22, 2010 at 11:31:25AM -0700, kishore kumar wrote:
>    I am trying create ramdisk image for my domU image from Konrad git
>    repository.
> 
>    mkinitrd --with xenblk --with xennet /boot/initrd-xenu.img  2.6.33
>    I get No module xenblk found for kernel 2.6.33, aborting.
>    Can you please let me know what could be the problem??
> 
>    I have CONFIG_XEN_BLKDEV_FRONTEND=y
>    CONFIG_XEN_NETDEV_FRONTEND=y in my .config as well.
> 

Xen modules in upstream kernel.org (pvops) kernels are not called xennet or xenblk.
They're called xen-blkfront and xen-netfront in pvops kernels.

You can easily verify be checking under /lib/modules/<kernelversion>/

-- Pasi

>    Thank You.
>    On Tue, Apr 20, 2010 at 6:45 PM, Konrad Rzeszutek Wilk
>    <[1]konrad.wilk@oracle.com> wrote:
> 
>      On Tue, Apr 20, 2010 at 05:09:29PM -0700, kishore kumar wrote:
>      > I did git pull and did
>      > make
>      > make modules_install install.
>      >   Is this the problem with xen blkdevices not loaded?  Can you let me
>      know
> 
>      So now you are hitting another problem. This looks
>      to be this one:
>      [2]http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
> 
>      Please follow the whole thread and select the right config options.
> 
> References
> 
>    Visible links
>    1. mailto:konrad.wilk@oracle.com
>    2. http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html

Re: [Xen-devel] Xen Dom U kernel

[kishore kumar]

[-- Attachment #1.1: Type: text/plain, Size: 1939 bytes --]

I tried
mkinitrd --with xen-blkfront --with xen-netfront /boot/initrd-xenu.img
 2.6.33
It complaints No module xen-blkfront found for kernel 2.6.33, aborting.

I dont see xen-blkfront.ko in my /lib/modules/2.633/drivers/block .  Am I
looking at the right place?

Thank You.


On Thu, Apr 22, 2010 at 12:53 PM, Pasi Kärkkäinen <pasik@iki.fi> wrote:

> On Thu, Apr 22, 2010 at 11:31:25AM -0700, kishore kumar wrote:
> >    I am trying create ramdisk image for my domU image from Konrad git
> >    repository.
> >
> >    mkinitrd --with xenblk --with xennet /boot/initrd-xenu.img  2.6.33
> >    I get No module xenblk found for kernel 2.6.33, aborting.
> >    Can you please let me know what could be the problem??
> >
> >    I have CONFIG_XEN_BLKDEV_FRONTEND=y
> >    CONFIG_XEN_NETDEV_FRONTEND=y in my .config as well.
> >
>
> Xen modules in upstream kernel.org (pvops) kernels are not called xennet
> or xenblk.
> They're called xen-blkfront and xen-netfront in pvops kernels.
>
> You can easily verify be checking under /lib/modules/<kernelversion>/
>
> -- Pasi
>
> >    Thank You.
> >    On Tue, Apr 20, 2010 at 6:45 PM, Konrad Rzeszutek Wilk
> >    <[1]konrad.wilk@oracle.com> wrote:
> >
> >      On Tue, Apr 20, 2010 at 05:09:29PM -0700, kishore kumar wrote:
> >      > I did git pull and did
> >      > make
> >      > make modules_install install.
> >      >   Is this the problem with xen blkdevices not loaded?  Can you let
> me
> >      know
> >
> >      So now you are hitting another problem. This looks
> >      to be this one:
> >      [2]
> http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
> >
> >      Please follow the whole thread and select the right config options.
> >
> > References
> >
> >    Visible links
> >    1. mailto:konrad.wilk@oracle.com
> >    2.
> http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
>

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Re: [Xen-devel] Xen Dom U kernel

[Pasi Kärkkäinen]

On Thu, Apr 22, 2010 at 01:08:54PM -0700, kishore kumar wrote:
>    I tried
>    mkinitrd --with xen-blkfront --with xen-netfront /boot/initrd-xenu.img
>     2.6.33
>    It complaints No module xen-blkfront found for kernel 2.6.33, aborting.
> 
>    I dont see xen-blkfront.ko in my /lib/modules/2.633/drivers/block .  Am I
>    looking at the right place?
> 

Have you done "depmod -a <kernelversion>" before running mkinitrd ? 

-- Pasi

>    Thank You.
> 
>    On Thu, Apr 22, 2010 at 12:53 PM, Pasi Kärkkäinen <[1]pasik@iki.fi> wrote:
> 
>      On Thu, Apr 22, 2010 at 11:31:25AM -0700, kishore kumar wrote:
>      >    I am trying create ramdisk image for my domU image from Konrad git
>      >    repository.
>      >
>      >    mkinitrd --with xenblk --with xennet /boot/initrd-xenu.img  2.6.33
>      >    I get No module xenblk found for kernel 2.6.33, aborting.
>      >    Can you please let me know what could be the problem??
>      >
>      >    I have CONFIG_XEN_BLKDEV_FRONTEND=y
>      >    CONFIG_XEN_NETDEV_FRONTEND=y in my .config as well.
>      >
> 
>      Xen modules in upstream [2]kernel.org (pvops) kernels are not called
>      xennet or xenblk.
>      They're called xen-blkfront and xen-netfront in pvops kernels.
> 
>      You can easily verify be checking under /lib/modules/<kernelversion>/
> 
>      -- Pasi
>      >    Thank You.
>      >    On Tue, Apr 20, 2010 at 6:45 PM, Konrad Rzeszutek Wilk
>      >    <[1][3]konrad.wilk@oracle.com> wrote:
>      >
>      >      On Tue, Apr 20, 2010 at 05:09:29PM -0700, kishore kumar wrote:
>      >      > I did git pull and did
>      >      > make
>      >      > make modules_install install.
>      >      >   Is this the problem with xen blkdevices not loaded?  Can you
>      let me
>      >      know
>      >
>      >      So now you are hitting another problem. This looks
>      >      to be this one:
>      >
>       [2][4]http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
>      >
>      >      Please follow the whole thread and select the right config
>      options.
>      >
>      > References
>      >
>      >    Visible links
>      >    1. mailto:[5]konrad.wilk@oracle.com
>      >    2.
>      [6]http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
> 
> References
> 
>    Visible links
>    1. mailto:pasik@iki.fi
>    2. http://kernel.org/
>    3. mailto:konrad.wilk@oracle.com
>    4. http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
>    5. mailto:konrad.wilk@oracle.com
>    6. http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html

Re: [Xen-devel] Xen Dom U kernel

[kishore kumar]

[-- Attachment #1.1: Type: text/plain, Size: 3165 bytes --]

I did below steps
make menuconfig
make
make modules_install install
/sbin/depmod -a 2.6.33
/sbin/mkinitrd --with xen-blkfront --with xen-netfront
/boot/initrd-xenu.img    2.6.33

still the same problem.


On Thu, Apr 22, 2010 at 1:25 PM, Pasi Kärkkäinen <pasik@iki.fi> wrote:

> On Thu, Apr 22, 2010 at 01:08:54PM -0700, kishore kumar wrote:
> >    I tried
> >    mkinitrd --with xen-blkfront --with xen-netfront /boot/initrd-xenu.img
> >     2.6.33
> >    It complaints No module xen-blkfront found for kernel 2.6.33,
> aborting.
> >
> >    I dont see xen-blkfront.ko in my /lib/modules/2.633/drivers/block .
>  Am I
> >    looking at the right place?
> >
>
> Have you done "depmod -a <kernelversion>" before running mkinitrd ?
>
> -- Pasi
>
> >    Thank You.
> >
> >    On Thu, Apr 22, 2010 at 12:53 PM, Pasi Kärkkäinen <[1]pasik@iki.fi>
> wrote:
> >
> >      On Thu, Apr 22, 2010 at 11:31:25AM -0700, kishore kumar wrote:
> >      >    I am trying create ramdisk image for my domU image from Konrad
> git
> >      >    repository.
> >      >
> >      >    mkinitrd --with xenblk --with xennet /boot/initrd-xenu.img
>  2.6.33
> >      >    I get No module xenblk found for kernel 2.6.33, aborting.
> >      >    Can you please let me know what could be the problem??
> >      >
> >      >    I have CONFIG_XEN_BLKDEV_FRONTEND=y
> >      >    CONFIG_XEN_NETDEV_FRONTEND=y in my .config as well.
> >      >
> >
> >      Xen modules in upstream [2]kernel.org (pvops) kernels are not
> called
> >      xennet or xenblk.
> >      They're called xen-blkfront and xen-netfront in pvops kernels.
> >
> >      You can easily verify be checking under
> /lib/modules/<kernelversion>/
> >
> >      -- Pasi
> >      >    Thank You.
> >      >    On Tue, Apr 20, 2010 at 6:45 PM, Konrad Rzeszutek Wilk
> >      >    <[1][3]konrad.wilk@oracle.com> wrote:
> >      >
> >      >      On Tue, Apr 20, 2010 at 05:09:29PM -0700, kishore kumar
> wrote:
> >      >      > I did git pull and did
> >      >      > make
> >      >      > make modules_install install.
> >      >      >   Is this the problem with xen blkdevices not loaded?  Can
> you
> >      let me
> >      >      know
> >      >
> >      >      So now you are hitting another problem. This looks
> >      >      to be this one:
> >      >
> >       [2][4]
> http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
> >      >
> >      >      Please follow the whole thread and select the right config
> >      options.
> >      >
> >      > References
> >      >
> >      >    Visible links
> >      >    1. mailto:[5]konrad.wilk@oracle.com
> >      >    2.
> >      [6]
> http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
> >
> > References
> >
> >    Visible links
> >    1. mailto:pasik@iki.fi
> >    2. http://kernel.org/
> >    3. mailto:konrad.wilk@oracle.com
> >    4.
> http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
> >    5. mailto:konrad.wilk@oracle.com
> >    6.
> http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
>

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Re: [Xen-devel] Xen Dom U kernel

[Pasi Kärkkäinen]

On Thu, Apr 22, 2010 at 01:39:57PM -0700, kishore kumar wrote:
>    I did below steps
>    make menuconfig
>    make
>    make modules_install install
>    /sbin/depmod -a 2.6.33
>    /sbin/mkinitrd --with xen-blkfront --with xen-netfront
>    /boot/initrd-xenu.img    2.6.33
> 

You had these .config options set:
CONFIG_XEN_BLKDEV_FRONTEND=y
CONFIG_XEN_NETDEV_FRONTEND=y

That means the drivers are built *into* the kernel statically,
and they're *not* built as modules.

So you don't need to use "--with xen-blkfront --with xen-netfront" for mkinitrd.

-- Pasi

>    still the same problem.
> 
>    On Thu, Apr 22, 2010 at 1:25 PM, Pasi Kärkkäinen <[1]pasik@iki.fi> wrote:
> 
>      On Thu, Apr 22, 2010 at 01:08:54PM -0700, kishore kumar wrote:
>      >    I tried
>      >    mkinitrd --with xen-blkfront --with xen-netfront
>      /boot/initrd-xenu.img
>      >     2.6.33
>      >    It complaints No module xen-blkfront found for kernel 2.6.33,
>      aborting.
>      >
>      >    I dont see xen-blkfront.ko in my /lib/modules/2.633/drivers/block .
>       Am I
>      >    looking at the right place?
>      >
> 
>      Have you done "depmod -a <kernelversion>" before running mkinitrd ?
> 
>      -- Pasi
> 
>      >    Thank You.
>      >
>      >    On Thu, Apr 22, 2010 at 12:53 PM, Pasi Kärkkäinen
>      <[1][2]pasik@iki.fi> wrote:
>      >
>      >      On Thu, Apr 22, 2010 at 11:31:25AM -0700, kishore kumar wrote:
>      >      >    I am trying create ramdisk image for my domU image from
>      Konrad git
>      >      >    repository.
>      >      >
>      >      >    mkinitrd --with xenblk --with xennet /boot/initrd-xenu.img
>       2.6.33
>      >      >    I get No module xenblk found for kernel 2.6.33, aborting.
>      >      >    Can you please let me know what could be the problem??
>      >      >
>      >      >    I have CONFIG_XEN_BLKDEV_FRONTEND=y
>      >      >    CONFIG_XEN_NETDEV_FRONTEND=y in my .config as well.
>      >      >
>      >
>      >      Xen modules in upstream [2][3]kernel.org (pvops) kernels are not
>      called
>      >      xennet or xenblk.
>      >      They're called xen-blkfront and xen-netfront in pvops kernels.
>      >
>      >      You can easily verify be checking under
>      /lib/modules/<kernelversion>/
>      >
>      >      -- Pasi
>      >      >    Thank You.
>      >      >    On Tue, Apr 20, 2010 at 6:45 PM, Konrad Rzeszutek Wilk
>      >      >    <[1][3][4]konrad.wilk@oracle.com> wrote:
>      >      >
>      >      >      On Tue, Apr 20, 2010 at 05:09:29PM -0700, kishore kumar
>      wrote:
>      >      >      > I did git pull and did
>      >      >      > make
>      >      >      > make modules_install install.
>      >      >      >   Is this the problem with xen blkdevices not loaded?
>       Can you
>      >      let me
>      >      >      know
>      >      >
>      >      >      So now you are hitting another problem. This looks
>      >      >      to be this one:
>      >      >
>      >
>      [2][4][5]http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
>      >      >
>      >      >      Please follow the whole thread and select the right config
>      >      options.
>      >      >
>      >      > References
>      >      >
>      >      >    Visible links
>      >      >    1. mailto:[5][6]konrad.wilk@oracle.com
>      >      >    2.
>      >
>       [6][7]http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
>      >
>      > References
>      >
>      >    Visible links
>      >    1. mailto:[8]pasik@iki.fi
>      >    2. [9]http://kernel.org/
>      >    3. mailto:[10]konrad.wilk@oracle.com
>      >    4.
>      [11]http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
>      >    5. mailto:[12]konrad.wilk@oracle.com
>      >    6.
>      [13]http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
> 
> References
> 
>    Visible links
>    1. mailto:pasik@iki.fi
>    2. mailto:pasik@iki.fi
>    3. http://kernel.org/
>    4. mailto:konrad.wilk@oracle.com
>    5. http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
>    6. mailto:konrad.wilk@oracle.com
>    7. http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
>    8. mailto:pasik@iki.fi
>    9. http://kernel.org/
>   10. mailto:konrad.wilk@oracle.com
>   11. http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
>   12. mailto:konrad.wilk@oracle.com
>   13. http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html

Re: Xen Dom U kernel

[kishore kumar]

[-- Attachment #1.1: Type: text/plain, Size: 6923 bytes --]

OK.
what could be the reason for my domU creation is failing here?

Mounting proc filesystem
Mounting sysfs filesystem
Creating /dev
Creating initial device nodes
Setting up hotplug.
Creating block device nodes.
Scanning and configuring dmraid supported devices
Scanning logical volumes
Reading all physical volumes. This may take a while...
Found volume group "VolGroup01" using metadata type lvm2
lvm used greatest stack depth: 4912 bytes left
Activating logical volumes
2 logical volume(s) in volume group "VolGroup01" now active
Trying to resume from /dev/VolGroup01/LogVol01
No suspend signature on swap, not resuming.
Creating root device.
Mounting root filesystem.
mount: could not find filesystem '/dev/root'
Setting up other filesystems.
Setting up new root fs
setuproot: moving /dev failed: No such file or directory
no fstab.sys, mounting internal defaults
setuproot: error mounting /proc: No such file or directory
setuproot: error mounting /sys: No such file or directory
Switching to new root and running init.
unmounting old /dev
unmounting old /proc
unmounting old /sys
switchroot: mount failed: No such file or directory
Kernel panic - not syncing: Attempted to kill init!
Pid: 1, comm: init Not tainted 2.6.33 #3
Call Trace:
[<ffffffff810513fa>] panic+0xa5/0x171
[<ffffffff81006891>] ? xen_force_evtchn_callback+0xd/0xf
[<ffffffff8148ce94>] ? _raw_write_unlock_irq+0x30/0x3b
[<ffffffff8107ecb8>] ? trace_hardirqs_on_caller+0x110/0x134
[<ffffffff8107ece9>] ? trace_hardirqs_on+0xd/0xf
[<ffffffff8148ce9b>] ? _raw_write_unlock_irq+0x37/0x3b
[<ffffffff81054b0c>] do_exit+0x7c/0x6f5
[<ffffffff8107189f>] ? up_read+0x2b/0x2f
[<ffffffff81055221>] sys_exit_group+0x0/0x1b
[<ffffffff81055238>] sys_exit_group+0x17/0x1b
[<ffffffff81009cf2>] system_call_fastpath+0x16/0x1b

Thank You.
On Thu, Apr 22, 2010 at 1:48 PM, Pasi Kärkkäinen <pasik@iki.fi> wrote:

> On Thu, Apr 22, 2010 at 01:39:57PM -0700, kishore kumar wrote:
> >    I did below steps
> >    make menuconfig
> >    make
> >    make modules_install install
> >    /sbin/depmod -a 2.6.33
> >    /sbin/mkinitrd --with xen-blkfront --with xen-netfront
> >    /boot/initrd-xenu.img    2.6.33
> >
>
> You had these .config options set:
> CONFIG_XEN_BLKDEV_FRONTEND=y
> CONFIG_XEN_NETDEV_FRONTEND=y
>
> That means the drivers are built *into* the kernel statically,
> and they're *not* built as modules.
>
> So you don't need to use "--with xen-blkfront --with xen-netfront" for
> mkinitrd.
>
> -- Pasi
>
> >    still the same problem.
> >
> >    On Thu, Apr 22, 2010 at 1:25 PM, Pasi Kärkkäinen <[1]pasik@iki.fi>
> wrote:
> >
> >      On Thu, Apr 22, 2010 at 01:08:54PM -0700, kishore kumar wrote:
> >      >    I tried
> >      >    mkinitrd --with xen-blkfront --with xen-netfront
> >      /boot/initrd-xenu.img
> >      >     2.6.33
> >      >    It complaints No module xen-blkfront found for kernel 2.6.33,
> >      aborting.
> >      >
> >      >    I dont see xen-blkfront.ko in my
> /lib/modules/2.633/drivers/block .
> >       Am I
> >      >    looking at the right place?
> >      >
> >
> >      Have you done "depmod -a <kernelversion>" before running mkinitrd ?
> >
> >      -- Pasi
> >
> >      >    Thank You.
> >      >
> >      >    On Thu, Apr 22, 2010 at 12:53 PM, Pasi Kärkkäinen
> >      <[1][2]pasik@iki.fi> wrote:
> >      >
> >      >      On Thu, Apr 22, 2010 at 11:31:25AM -0700, kishore kumar
> wrote:
> >      >      >    I am trying create ramdisk image for my domU image from
> >      Konrad git
> >      >      >    repository.
> >      >      >
> >      >      >    mkinitrd --with xenblk --with xennet
> /boot/initrd-xenu.img
> >       2.6.33
> >      >      >    I get No module xenblk found for kernel 2.6.33,
> aborting.
> >      >      >    Can you please let me know what could be the problem??
> >      >      >
> >      >      >    I have CONFIG_XEN_BLKDEV_FRONTEND=y
> >      >      >    CONFIG_XEN_NETDEV_FRONTEND=y in my .config as well.
> >      >      >
> >      >
> >      >      Xen modules in upstream [2][3]kernel.org (pvops) kernels are
> not
> >      called
> >      >      xennet or xenblk.
> >      >      They're called xen-blkfront and xen-netfront in pvops
> kernels.
> >      >
> >      >      You can easily verify be checking under
> >      /lib/modules/<kernelversion>/
> >      >
> >      >      -- Pasi
> >      >      >    Thank You.
> >      >      >    On Tue, Apr 20, 2010 at 6:45 PM, Konrad Rzeszutek Wilk
> >      >      >    <[1][3][4]konrad.wilk@oracle.com> wrote:
> >      >      >
> >      >      >      On Tue, Apr 20, 2010 at 05:09:29PM -0700, kishore
> kumar
> >      wrote:
> >      >      >      > I did git pull and did
> >      >      >      > make
> >      >      >      > make modules_install install.
> >      >      >      >   Is this the problem with xen blkdevices not
> loaded?
> >       Can you
> >      >      let me
> >      >      >      know
> >      >      >
> >      >      >      So now you are hitting another problem. This looks
> >      >      >      to be this one:
> >      >      >
> >      >
> >      [2][4][5]
> http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
> >      >      >
> >      >      >      Please follow the whole thread and select the right
> config
> >      >      options.
> >      >      >
> >      >      > References
> >      >      >
> >      >      >    Visible links
> >      >      >    1. mailto:[5][6]konrad.wilk@oracle.com
> >      >      >    2.
> >      >
> >       [6][7]
> http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
> >      >
> >      > References
> >      >
> >      >    Visible links
> >      >    1. mailto:[8]pasik@iki.fi
> >      >    2. [9]http://kernel.org/
> >      >    3. mailto:[10]konrad.wilk@oracle.com
> >      >    4.
> >      [11]
> http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
> >      >    5. mailto:[12]konrad.wilk@oracle.com
> >      >    6.
> >      [13]
> http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
> >
> > References
> >
> >    Visible links
> >    1. mailto:pasik@iki.fi
> >    2. mailto:pasik@iki.fi
> >    3. http://kernel.org/
> >    4. mailto:konrad.wilk@oracle.com
> >    5.
> http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
> >    6. mailto:konrad.wilk@oracle.com
> >    7.
> http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
> >    8. mailto:pasik@iki.fi
> >    9. http://kernel.org/
> >   10. mailto:konrad.wilk@oracle.com
> >   11.
> http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
> >   12. mailto:konrad.wilk@oracle.com
> >   13.
> http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00897.html
>

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Re: Xen Dom U kernel

[Konrad Rzeszutek Wilk]

On Thu, Apr 22, 2010 at 02:35:04PM -0700, kishore kumar wrote:
> OK.
> what could be the reason for my domU creation is failing here?

Hmm, Are you using a RHEL5/CentOS based userspace to build the initrd image?

If you are please take a look at this:
http://wiki.xensource.com/xenwiki/2.6.18-to-2.6.31-and-higher

> 
> Mounting proc filesystem
> Mounting sysfs filesystem
> Creating /dev
> Creating initial device nodes
> Setting up hotplug.
> Creating block device nodes.
> Scanning and configuring dmraid supported devices
> Scanning logical volumes
> Reading all physical volumes. This may take a while...
> Found volume group "VolGroup01" using metadata type lvm2
> lvm used greatest stack depth: 4912 bytes left
> Activating logical volumes
> 2 logical volume(s) in volume group "VolGroup01" now active
> Trying to resume from /dev/VolGroup01/LogVol01
> No suspend signature on swap, not resuming.
> Creating root device.
> Mounting root filesystem.
> mount: could not find filesystem '/dev/root'
> Setting up other filesystems.
> Setting up new root fs
> setuproot: moving /dev failed: No such file or directory
> no fstab.sys, mounting internal defaults
> setuproot: error mounting /proc: No such file or directory
> setuproot: error mounting /sys: No such file or directory
> Switching to new root and running init.
> unmounting old /dev
> unmounting old /proc
> unmounting old /sys
> switchroot: mount failed: No such file or directory
> Kernel panic - not syncing: Attempted to kill init!
> Pid: 1, comm: init Not tainted 2.6.33 #3
> Call Trace:
> [<ffffffff810513fa>] panic+0xa5/0x171
> [<ffffffff81006891>] ? xen_force_evtchn_callback+0xd/0xf
> [<ffffffff8148ce94>] ? _raw_write_unlock_irq+0x30/0x3b
> [<ffffffff8107ecb8>] ? trace_hardirqs_on_caller+0x110/0x134
> [<ffffffff8107ece9>] ? trace_hardirqs_on+0xd/0xf
> [<ffffffff8148ce9b>] ? _raw_write_unlock_irq+0x37/0x3b
> [<ffffffff81054b0c>] do_exit+0x7c/0x6f5
> [<ffffffff8107189f>] ? up_read+0x2b/0x2f
> [<ffffffff81055221>] sys_exit_group+0x0/0x1b
> [<ffffffff81055238>] sys_exit_group+0x17/0x1b
> [<ffffffff81009cf2>] system_call_fastpath+0x16/0x1b

Re: Xen Dom U kernel

[kishore kumar]

[-- Attachment #1.1: Type: text/plain, Size: 3315 bytes --]

I am using RHEL5.

and I have below too in my .config.

CONFIG_SYSFS_DEPRECATED=y
CONFIG_SYSFS_DEPRECATED_V2=y

My /etc/modprobe.conf has the following

alias scsi_hostadapter ahci
alias eth2 ixgbe
alias eth3 ixgbe

Do I need to add the below lines in /etc/modprobe.conf ??
from http://wiki.xensource.com/xenwiki/2.6.18-to-2.6.31-and-higher link?

# RHEL -> FC11 quick upgrade path.
grep -q xenfs /etc/fstab || echo "xenfs
/proc/xen               xenfs   defaults        0 0" >> /etc/fstab
if grep -q ata_piix /etc/modprobe.conf ; then
        NR=`cat /etc/modprobe.conf | grep scsi | wc -l | sed
s/[[:space:]]*//`
        grep -q pata_oldpiix /etc/modprobe.conf || echo "alias
scsi_hostadapter$NR pata_oldpiix" >> /etc/modprobe.conf
fi
grep -q hvc /etc/inittab || echo "co:2345:respawn:/sbin/agetty hvc0 9600
vt100-nav" >> /etc/inittab
grep -q hvc0 /etc/securetty || echo "hvc0" >> /etc/securetty
Could you please let me know what exactly needs to be done?  I could not get
much out of it?
Thank You.

On Thu, Apr 22, 2010 at 2:47 PM, Konrad Rzeszutek Wilk <
konrad.wilk@oracle.com> wrote:

> On Thu, Apr 22, 2010 at 02:35:04PM -0700, kishore kumar wrote:
> > OK.
> > what could be the reason for my domU creation is failing here?
>
> Hmm, Are you using a RHEL5/CentOS based userspace to build the initrd
> image?
>
> If you are please take a look at this:
> http://wiki.xensource.com/xenwiki/2.6.18-to-2.6.31-and-higher
>
> >
> > Mounting proc filesystem
> > Mounting sysfs filesystem
> > Creating /dev
> > Creating initial device nodes
> > Setting up hotplug.
> > Creating block device nodes.
> > Scanning and configuring dmraid supported devices
> > Scanning logical volumes
> > Reading all physical volumes. This may take a while...
> > Found volume group "VolGroup01" using metadata type lvm2
> > lvm used greatest stack depth: 4912 bytes left
> > Activating logical volumes
> > 2 logical volume(s) in volume group "VolGroup01" now active
> > Trying to resume from /dev/VolGroup01/LogVol01
> > No suspend signature on swap, not resuming.
> > Creating root device.
> > Mounting root filesystem.
> > mount: could not find filesystem '/dev/root'
> > Setting up other filesystems.
> > Setting up new root fs
> > setuproot: moving /dev failed: No such file or directory
> > no fstab.sys, mounting internal defaults
> > setuproot: error mounting /proc: No such file or directory
> > setuproot: error mounting /sys: No such file or directory
> > Switching to new root and running init.
> > unmounting old /dev
> > unmounting old /proc
> > unmounting old /sys
> > switchroot: mount failed: No such file or directory
> > Kernel panic - not syncing: Attempted to kill init!
> > Pid: 1, comm: init Not tainted 2.6.33 #3
> > Call Trace:
> > [<ffffffff810513fa>] panic+0xa5/0x171
> > [<ffffffff81006891>] ? xen_force_evtchn_callback+0xd/0xf
> > [<ffffffff8148ce94>] ? _raw_write_unlock_irq+0x30/0x3b
> > [<ffffffff8107ecb8>] ? trace_hardirqs_on_caller+0x110/0x134
> > [<ffffffff8107ece9>] ? trace_hardirqs_on+0xd/0xf
> > [<ffffffff8148ce9b>] ? _raw_write_unlock_irq+0x37/0x3b
> > [<ffffffff81054b0c>] do_exit+0x7c/0x6f5
> > [<ffffffff8107189f>] ? up_read+0x2b/0x2f
> > [<ffffffff81055221>] sys_exit_group+0x0/0x1b
> > [<ffffffff81055238>] sys_exit_group+0x17/0x1b
> > [<ffffffff81009cf2>] system_call_fastpath+0x16/0x1b
>

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Re: Xen Dom U kernel

[Konrad Rzeszutek Wilk]

On Thu, Apr 22, 2010 at 05:15:35PM -0700, kishore kumar wrote:
> I am using RHEL5.
> 
> and I have below too in my .config.
> 
> CONFIG_SYSFS_DEPRECATED=y
> CONFIG_SYSFS_DEPRECATED_V2=y

Good. Where did you come up with the .config file? Did you use the same
one as the Dom0?

> My /etc/modprobe.conf has the following
> 
> alias scsi_hostadapter ahci
> alias eth2 ixgbe
> alias eth3 ixgbe
> 
> Do I need to add the below lines in /etc/modprobe.conf ??

Those are when you migrate your Dom0 from 2.6.18 to 2.6.31. Let me
make that specific in the Wiki.
.. snip..

> Could you please let me know what exactly needs to be done?  I could not get
> much out of it?

I can't tell you step-by-step what to do. What I can do is give pointers
of where to look.

1). Do you have the filesystem for you DomU compiled in?

2). Can you edit mkinitrd so it doesn't use the 'setquiet' option. That
will give you more debug data. Run mkinitrd to recreate the initrd
image.

4). Does you guest configuration file have an 'extra' and 'root'? Try
for right now to only have the root, and make sure it is minimal. So for
example:
root="/dev/VolGroup01/LogVol00 ro"

5). You do have CONFIG_BLK_DEV_INITRD=y set right?

> Thank You.
> 
> On Thu, Apr 22, 2010 at 2:47 PM, Konrad Rzeszutek Wilk <
> konrad.wilk@oracle.com> wrote:
> 
> > On Thu, Apr 22, 2010 at 02:35:04PM -0700, kishore kumar wrote:
> > > OK.
> > > what could be the reason for my domU creation is failing here?
> >
> > Hmm, Are you using a RHEL5/CentOS based userspace to build the initrd
> > image?
> >
> > If you are please take a look at this:
> > http://wiki.xensource.com/xenwiki/2.6.18-to-2.6.31-and-higher
> >
> > >
> > > Mounting proc filesystem
> > > Mounting sysfs filesystem
> > > Creating /dev
> > > Creating initial device nodes
> > > Setting up hotplug.
> > > Creating block device nodes.
> > > Scanning and configuring dmraid supported devices
> > > Scanning logical volumes
> > > Reading all physical volumes. This may take a while...
> > > Found volume group "VolGroup01" using metadata type lvm2
> > > lvm used greatest stack depth: 4912 bytes left
> > > Activating logical volumes
> > > 2 logical volume(s) in volume group "VolGroup01" now active
> > > Trying to resume from /dev/VolGroup01/LogVol01
> > > No suspend signature on swap, not resuming.
> > > Creating root device.
> > > Mounting root filesystem.
> > > mount: could not find filesystem '/dev/root'
> > > Setting up other filesystems.
> > > Setting up new root fs
> > > setuproot: moving /dev failed: No such file or directory

Uhh. 
> > > no fstab.sys, mounting internal defaults

That is weird. The 'Creating root device' usually sets the /etc/fstab
file

> > > setuproot: error mounting /proc: No such file or directory
> > > setuproot: error mounting /sys: No such file or directory
> > > Switching to new root and running init.
> > > unmounting old /dev
> > > unmounting old /proc
> > > unmounting old /sys
> > > switchroot: mount failed: No such file or directory
> > > Kernel panic - not syncing: Attempted to kill init!
> > > Pid: 1, comm: init Not tainted 2.6.33 #3
> > > Call Trace:
> > > [<ffffffff810513fa>] panic+0xa5/0x171
> > > [<ffffffff81006891>] ? xen_force_evtchn_callback+0xd/0xf
> > > [<ffffffff8148ce94>] ? _raw_write_unlock_irq+0x30/0x3b
> > > [<ffffffff8107ecb8>] ? trace_hardirqs_on_caller+0x110/0x134
> > > [<ffffffff8107ece9>] ? trace_hardirqs_on+0xd/0xf
> > > [<ffffffff8148ce9b>] ? _raw_write_unlock_irq+0x37/0x3b
> > > [<ffffffff81054b0c>] do_exit+0x7c/0x6f5
> > > [<ffffffff8107189f>] ? up_read+0x2b/0x2f
> > > [<ffffffff81055221>] sys_exit_group+0x0/0x1b
> > > [<ffffffff81055238>] sys_exit_group+0x17/0x1b
> > > [<ffffffff81009cf2>] system_call_fastpath+0x16/0x1b
> >

Re: Xen Dom U kernel

[kishore kumar]

[-- Attachment #1.1: Type: text/plain, Size: 5130 bytes --]

Thank you for your pointers.
Please find the answers for your questions.  May be there could be something
I am doing wrong here.

Where did you come up with the .config file? Did you use the same one as the
Dom0?
   NO. After I do git pull from konrad git repository and do make
menuconfig, I guess the .config file is generated. I am not using Dom 0
.config file.

1). Do you have the filesystem for you DomU compiled in?
     NO.  After My xen with pvops dom 0 is up and running, I just pulled the
dom U from konrad git and compiled.

2). Does you guest configuration file have an 'extra' and 'root'? Try
for right now to only have the root, and make sure it is minimal.

Below are the only options I have in my guest configuration file.  I doubt
if I have provided the right disk option here. Please help me here if I
provided the wrong disk option.
kernel = "/boot/vmlinuz-2.6.33"
ramdisk = "boot/initrd-2.6.33.img"
builder='linux'
memory=512
disk = ['phy:sda2,sda2,w']
root="/dev/volGroup01/Logvol00 ro"

I have CONFIG_BLK_DEV_INITRD=y set

Please let me know if something wrong I did here.

Thank You.






On Thu, Apr 22, 2010 at 6:36 PM, Konrad Rzeszutek Wilk <
konrad.wilk@oracle.com> wrote:

> On Thu, Apr 22, 2010 at 05:15:35PM -0700, kishore kumar wrote:
> > I am using RHEL5.
> >
> > and I have below too in my .config.
> >
> > CONFIG_SYSFS_DEPRECATED=y
> > CONFIG_SYSFS_DEPRECATED_V2=y
>
> Good. Where did you come up with the .config file? Did you use the same
> one as the Dom0?
>
> > My /etc/modprobe.conf has the following
> >
> > alias scsi_hostadapter ahci
> > alias eth2 ixgbe
> > alias eth3 ixgbe
> >
> > Do I need to add the below lines in /etc/modprobe.conf ??
>
> Those are when you migrate your Dom0 from 2.6.18 to 2.6.31. Let me
> make that specific in the Wiki.
> .. snip..
>
> > Could you please let me know what exactly needs to be done?  I could not
> get
> > much out of it?
>
> I can't tell you step-by-step what to do. What I can do is give pointers
> of where to look.
>
> 1). Do you have the filesystem for you DomU compiled in?
>
> 2). Can you edit mkinitrd so it doesn't use the 'setquiet' option. That
> will give you more debug data. Run mkinitrd to recreate the initrd
> image.
>
> 4). Does you guest configuration file have an 'extra' and 'root'? Try
> for right now to only have the root, and make sure it is minimal. So for
> example:
> root="/dev/VolGroup01/LogVol00 ro"
>
> 5). You do have CONFIG_BLK_DEV_INITRD=y set right?
>
> > Thank You.
> >
> > On Thu, Apr 22, 2010 at 2:47 PM, Konrad Rzeszutek Wilk <
> > konrad.wilk@oracle.com> wrote:
> >
> > > On Thu, Apr 22, 2010 at 02:35:04PM -0700, kishore kumar wrote:
> > > > OK.
> > > > what could be the reason for my domU creation is failing here?
> > >
> > > Hmm, Are you using a RHEL5/CentOS based userspace to build the initrd
> > > image?
> > >
> > > If you are please take a look at this:
> > > http://wiki.xensource.com/xenwiki/2.6.18-to-2.6.31-and-higher
> > >
> > > >
> > > > Mounting proc filesystem
> > > > Mounting sysfs filesystem
> > > > Creating /dev
> > > > Creating initial device nodes
> > > > Setting up hotplug.
> > > > Creating block device nodes.
> > > > Scanning and configuring dmraid supported devices
> > > > Scanning logical volumes
> > > > Reading all physical volumes. This may take a while...
> > > > Found volume group "VolGroup01" using metadata type lvm2
> > > > lvm used greatest stack depth: 4912 bytes left
> > > > Activating logical volumes
> > > > 2 logical volume(s) in volume group "VolGroup01" now active
> > > > Trying to resume from /dev/VolGroup01/LogVol01
> > > > No suspend signature on swap, not resuming.
> > > > Creating root device.
> > > > Mounting root filesystem.
> > > > mount: could not find filesystem '/dev/root'
> > > > Setting up other filesystems.
> > > > Setting up new root fs
> > > > setuproot: moving /dev failed: No such file or directory
>
> Uhh.
> > > > no fstab.sys, mounting internal defaults
>
> That is weird. The 'Creating root device' usually sets the /etc/fstab
> file
>
> > > > setuproot: error mounting /proc: No such file or directory
> > > > setuproot: error mounting /sys: No such file or directory
> > > > Switching to new root and running init.
> > > > unmounting old /dev
> > > > unmounting old /proc
> > > > unmounting old /sys
> > > > switchroot: mount failed: No such file or directory
> > > > Kernel panic - not syncing: Attempted to kill init!
> > > > Pid: 1, comm: init Not tainted 2.6.33 #3
> > > > Call Trace:
> > > > [<ffffffff810513fa>] panic+0xa5/0x171
> > > > [<ffffffff81006891>] ? xen_force_evtchn_callback+0xd/0xf
> > > > [<ffffffff8148ce94>] ? _raw_write_unlock_irq+0x30/0x3b
> > > > [<ffffffff8107ecb8>] ? trace_hardirqs_on_caller+0x110/0x134
> > > > [<ffffffff8107ece9>] ? trace_hardirqs_on+0xd/0xf
> > > > [<ffffffff8148ce9b>] ? _raw_write_unlock_irq+0x37/0x3b
> > > > [<ffffffff81054b0c>] do_exit+0x7c/0x6f5
> > > > [<ffffffff8107189f>] ? up_read+0x2b/0x2f
> > > > [<ffffffff81055221>] sys_exit_group+0x0/0x1b
> > > > [<ffffffff81055238>] sys_exit_group+0x17/0x1b
> > > > [<ffffffff81009cf2>] system_call_fastpath+0x16/0x1b
> > >
>

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Re: Xen Dom U kernel

[Konrad Rzeszutek Wilk]

> root="/dev/volGroup01/Logvol00 ro"
             ^
There is your problem.

Re: Xen Dom U kernel

[kishore kumar]

[-- Attachment #1.1: Type: text/plain, Size: 371 bytes --]

Is this not the right option?
root = "/dev/VolGroup01/LogVol00 ro"

I even tried with below options as well.
disk = [ 'file:/home/guest.img,xvda,w' ]

root = "/dev/xvda1"

extra = "4 console=hvc0"


On Fri, Apr 23, 2010 at 11:04 AM, Konrad Rzeszutek Wilk <
konrad.wilk@oracle.com> wrote:

> > root="/dev/volGroup01/Logvol00 ro"
>             ^
> There is your problem.
>

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Re: Xen Dom U kernel

[Sander Eikelenboom]

Hello kishore,

I think Konrad, meant to be sure you use the right device name, everything is case sensitive.

Friday, April 23, 2010, 8:09:52 PM, you wrote:

> Is this not the right option?
> root = "/dev/VolGroup01/LogVol00 ro"

> I even tried with below options as well.
> disk = [ 'file:/home/guest.img,xvda,w' ]

> root = "/dev/xvda1"

> extra = "4 console=hvc0"


> On Fri, Apr 23, 2010 at 11:04 AM, Konrad Rzeszutek Wilk <
> konrad.wilk@oracle.com> wrote:

>> > root="/dev/volGroup01/Logvol00 ro"
>>             ^
>> There is your problem.
>>



-- 
Best regards,
 Sander                            mailto:linux@eikelenboom.it

Re: Xen Dom U kernel

[kishore kumar]

[-- Attachment #1.1: Type: text/plain, Size: 905 bytes --]

Yeah.
My apology Konrad.

It was typo from me.  I have below in my guest config file.
root = "/dev/VolGroup01/LogVol00 ro"

Thank You.
On Fri, Apr 23, 2010 at 11:34 AM, Sander Eikelenboom
<linux@eikelenboom.it>wrote:

> Hello kishore,
>
> I think Konrad, meant to be sure you use the right device name, everything
> is case sensitive.
>
> Friday, April 23, 2010, 8:09:52 PM, you wrote:
>
> > Is this not the right option?
> > root = "/dev/VolGroup01/LogVol00 ro"
>
> > I even tried with below options as well.
> > disk = [ 'file:/home/guest.img,xvda,w' ]
>
> > root = "/dev/xvda1"
>
> > extra = "4 console=hvc0"
>
>
> > On Fri, Apr 23, 2010 at 11:04 AM, Konrad Rzeszutek Wilk <
> > konrad.wilk@oracle.com> wrote:
>
> >> > root="/dev/volGroup01/Logvol00 ro"
> >>             ^
> >> There is your problem.
> >>
>
>
>
> --
> Best regards,
>  Sander                            mailto:linux@eikelenboom.it
>
>

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Re: Xen Dom U kernel

[Konrad Rzeszutek Wilk]

On Fri, Apr 23, 2010 at 11:39:54AM -0700, kishore kumar wrote:
> Yeah.
> My apology Konrad.
> 
> It was typo from me.  I have below in my guest config file.
> root = "/dev/VolGroup01/LogVol00 ro"

I need two files from you.

1) The guest config file. Can you just attach to your response the guest file. Don't do
copy-n-paste - just attach it as a attachment.

What I think you are doing is having extra 'root' or 'extra' in the
configuration file causing the kernel to not understand where to load.

2) The whole console output. Not just the end.
Otherwise I don't know what kind of kernel paramter options the kernel sees.

> > Hello kishore,
> >
> > I think Konrad, meant to be sure you use the right device name, everything
> > is case sensitive.

Correct.

Re: [Xen-devel] Xen Dom U kernel

[kishore kumar]

[-- Attachment #1.1: Type: text/plain, Size: 1031 bytes --]

Now I see something different in the console.
Please find the attached console output and the guest configuration file.

Thank You.
On Fri, Apr 23, 2010 at 1:08 PM, Konrad Rzeszutek Wilk <
konrad.wilk@oracle.com> wrote:

> On Fri, Apr 23, 2010 at 11:39:54AM -0700, kishore kumar wrote:
> > Yeah.
> > My apology Konrad.
> >
> > It was typo from me.  I have below in my guest config file.
> > root = "/dev/VolGroup01/LogVol00 ro"
>
> I need two files from you.
>
> 1) The guest config file. Can you just attach to your response the guest
> file. Don't do
> copy-n-paste - just attach it as a attachment.
>
> What I think you are doing is having extra 'root' or 'extra' in the
> configuration file causing the kernel to not understand where to load.
>
> 2) The whole console output. Not just the end.
> Otherwise I don't know what kind of kernel paramter options the kernel
> sees.
>
> > > Hello kishore,
> > >
> > > I think Konrad, meant to be sure you use the right device name,
> everything
> > > is case sensitive.
>
> Correct.
>

[-- Attachment #1.2: Type: text/html, Size: 1475 bytes --]

[-- Attachment #2: xmexample1 --]
[-- Type: text/plain, Size: 781 bytes --]


#----------------------------------------------------------------------------
# Kernel image file.
kernel = "/boot/vmlinuz-2.6.33"

# Optional ramdisk.
ramdisk = "/boot/initrd-2.6.33.img"

# The domain build function. Default is 'linux'.
builder='linux'

memory = 512

# A name for your domain. All domains must have different names.
name = "KonardDomU"

# Number of Virtual CPUS to use, default is 1
vcpus = 5

vif = [ '' ]

disk = [ 'phy:sda2,sda2,w' ]
#disk = ['file:/boot/initrd-2.6.33.img,xvda,w']

# Set if you want dhcp to allocate the IP address.
dhcp="dhcp"

# Set root device.
#root = "/dev/hda1 ro"
root =  "/dev/VolGroup01/LogVol00 ro"
#root = "root=/dev/xvda1"
#root = "/dev/sda2 "

# Sets runlevel 4.
#extra = "4 console=hvc0"



[-- Attachment #3: DomU_Apr_23_120PM.txt --]
[-- Type: text/plain, Size: 11865 bytes --]

Using config file "/home/kishore/mar_15/xmexample1".
Started domain KonardDomU (id=4)
                                Initializing cgroup subsys cpuset
Initializing cgroup subsys cpu
Linux version 2.6.33 (kishore@localhost.localdomain) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-46)) #3 SMP Tue Apr 20 16:47:11 PDT 2010
Command line: root=/dev/VolGroup01/LogVol00 ro ip=:127.0.255.255::::eth0:dhcp 
ACPI in unprivileged domain disabled
BIOS-provided physical RAM map:
 Xen: 0000000000000000 - 00000000000a0000 (usable)
 Xen: 00000000000a0000 - 0000000000100000 (reserved)
 Xen: 0000000000100000 - 0000000020000000 (usable)
NX (Execute Disable) protection: active
DMI not present or invalid.
No AGP bridge found
last_pfn = 0x20000 max_arch_pfn = 0x400000000
init_memory_mapping: 0000000000000000-0000000020000000
RAMDISK: 029d4000 - 03008000
No NUMA configuration found
Faking a node at 0000000000000000-0000000020000000
Bootmem setup node 0 0000000000000000-0000000020000000
  NODE_DATA [0000000000007000 - 000000000001efff]
  bootmap [000000000001f000 -  0000000000022fff] pages 4
(8 early reservations) ==> bootmem [0000000000 - 0020000000]
  #0 [0000000000 - 0000001000]   BIOS data page ==> [0000000000 - 0000001000]
  #1 [000310b000 - 0003128000]   XEN PAGETABLES ==> [000310b000 - 0003128000]
  #2 [0001000000 - 00029b3878]    TEXT DATA BSS ==> [0001000000 - 00029b3878]
  #3 [00029d4000 - 0003008000]          RAMDISK ==> [00029d4000 - 0003008000]
  #4 [0003008000 - 000310b000]   XEN START INFO ==> [0003008000 - 000310b000]
  #5 [0000001000 - 0000003000]       TRAMPOLINE ==> [0000001000 - 0000003000]
  #6 [0000003000 - 0000007000]      ACPI WAKEUP ==> [0000003000 - 0000007000]
  #7 [0000100000 - 00001e2000]          PGTABLE ==> [0000100000 - 00001e2000]
Zone PFN ranges:
  DMA      0x00000000 -> 0x00001000
  DMA32    0x00001000 -> 0x00100000
  Normal   0x00100000 -> 0x00100000
Movable zone start PFN for each node
early_node_map[2] active PFN ranges
    0: 0x00000000 -> 0x000000a0
    0: 0x00000100 -> 0x00020000
SMP: Allowing 5 CPUs, 0 hotplug CPUs
No local APIC present
APIC: disable apic facility
APIC: switched to apic NOOP
PM: Registered nosave memory: 00000000000a0000 - 0000000000100000
Allocating PCI resources starting at 20000000 (gap: 20000000:e0000000)
Booting paravirtualized kernel on Xen
Xen version: 3.4.3-rc4-pre (preserve-AD)
setup_percpu: NR_CPUS:512 nr_cpumask_bits:512 nr_cpu_ids:5 nr_node_ids:1
PERCPU: Embedded 478 pages/cpu @ffff880003c2f000 s1928344 r8192 d21352 u1957888
pcpu-alloc: s1928344 r8192 d21352 u1957888 alloc=478*4096
pcpu-alloc: [0] 0 [0] 1 [0] 2 [0] 3 [0] 4 
Xen: using vcpu_info placement
Built 1 zonelists in Node order, mobility grouping on.  Total pages: 128951
Policy zone: DMA32
Kernel command line: root=/dev/VolGroup01/LogVol00 ro ip=:127.0.255.255::::eth0:dhcp 
PID hash table entries: 2048 (order: 2, 16384 bytes)
Checking aperture...
No AGP bridge found
Memory: 472204k/524288k available (4689k kernel code, 384k absent, 51700k reserved, 6678k data, 3392k init)
SLUB: Genslabs=14, HWalign=64, Order=0-3, MinObjects=0, CPUs=5, Nodes=1
Hierarchical RCU implementation.
NR_IRQS:4352 nr_irqs:312
Console: colour dummy device 80x25
console [tty0] enabled
console [hvc0] enabled
Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar
... MAX_LOCKDEP_SUBCLASSES:  8
... MAX_LOCK_DEPTH:          48
... MAX_LOCKDEP_KEYS:        8191
... CLASSHASH_SIZE:          4096
... MAX_LOCKDEP_ENTRIES:     16384
... MAX_LOCKDEP_CHAINS:      32768
... CHAINHASH_SIZE:          16384
 memory used by lock dependency info: 6367 kB
 per task-struct memory footprint: 2688 bytes
allocated 5242880 bytes of page_cgroup
please try 'cgroup_disable=memory' option if you don't want memory cgroups
installing Xen timer for CPU 0
Detected 2400.084 MHz processor.
Calibrating delay loop (skipped), value calculated using timer frequency.. 4800.16 BogoMIPS (lpj=2400084)
Security Framework initialized
SELinux:  Initializing.
Dentry cache hash table entries: 65536 (order: 7, 524288 bytes)
Inode-cache hash table entries: 32768 (order: 6, 262144 bytes)
Mount-cache hash table entries: 256
Initializing cgroup subsys ns
Initializing cgroup subsys cpuacct
Initializing cgroup subsys memory
Initializing cgroup subsys devices
Initializing cgroup subsys freezer
Initializing cgroup subsys net_cls
CPU: Unsupported number of siblings 16
Performance Events: unsupported p6 CPU model 26 no PMU driver, software events only.
lockdep: fixing up alternatives.
SMP alternatives: switching to UP code
ftrace: converting mcount calls to 0f 1f 44 00 00
ftrace: allocating 27219 entries in 107 pages
installing Xen timer for CPU 1
lockdep: fixing up alternatives.
SMP alternatives: switching to SMP code
CPU: Unsupported number of siblings 16
installing Xen timer for CPU 2
CPU: Unsupported number of siblings 16
installing Xen timer for CPU 3
CPU: Unsupported number of siblings 16
installing Xen timer for CPU 4
CPU: Unsupported number of siblings 16
Brought up 5 CPUs
Grant table initialized
regulator: core version 0.5
Time: 165:165:165  Date: 165/165/65
NET: Registered protocol family 16
PCI: setting up Xen PCI frontend stub
bio: create slab <bio-0> at 0
ACPI: Interpreter disabled.
xen_balloon: Initialising balloon driver.
vgaarb: loaded
SCSI subsystem initialized
usbcore: registered new interface driver usbfs
usbcore: registered new interface driver hub
usbcore: registered new device driver usb
PCI: System does not support PCI
PCI: System does not support PCI
NetLabel: Initializing
NetLabel:  domain hash size = 128
NetLabel:  protocols = UNLABELED CIPSOv4
NetLabel:  unlabeled traffic allowed by default
Switching to clocksource xen
kstop/0 used greatest stack depth: 6568 bytes left
kstop/1 used greatest stack depth: 6552 bytes left
pnp: PnP ACPI: disabled
NET: Registered protocol family 2
IP route cache hash table entries: 4096 (order: 3, 32768 bytes)
TCP established hash table entries: 16384 (order: 6, 262144 bytes)
TCP bind hash table entries: 16384 (order: 8, 1179648 bytes)
TCP: Hash tables configured (established 16384 bind 16384)
TCP reno registered
UDP hash table entries: 256 (order: 3, 40960 bytes)
UDP-Lite hash table entries: 256 (order: 3, 40960 bytes)
NET: Registered protocol family 1
Trying to unpack rootfs image as initramfs...
Freeing initrd memory: 6352k freed
DMA-API: preallocated 32768 debug entries
DMA-API: debugging enabled by kernel config
platform rtc_cmos: registered platform RTC device (no PNP device found)
audit: initializing netlink socket (disabled)
type=2000 audit(1272028610.653:1): initialized
HugeTLB registered 2 MB page size, pre-allocated 0 pages
VFS: Disk quotas dquot_6.5.2
Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
msgmni has been set to 934
cryptomgr_test used greatest stack depth: 5368 bytes left
alg: No test for stdrng (krng)
Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252)
io scheduler noop registered
io scheduler deadline registered
io scheduler cfq registered (default)
pci_hotplug: PCI Hot Plug PCI Core version: 0.5
pciehp: PCI Express Hot Plug Controller Driver version: 0.4
acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
pci-stub: invalid id string ""
Non-volatile memory driver v1.3
Linux agpgart interface v0.103
Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
brd: module loaded
loop: module loaded
input: Macintosh mouse button emulation as /class/input/input0
Fixed MDIO Bus: probed
ixgbe: Intel(R) 10 Gigabit PCI Express Network Driver - version 2.0.44-k2
ixgbe: Copyright (c) 1999-2010 Intel Corporation.
Intel(R) PRO/10GbE Network Driver - version 1.0.135-k2-NAPI
Copyright (c) 1999-2008 Intel Corporation.
Initialising Xen virtual ethernet driver.
ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
uhci_hcd: USB Universal Host Controller Interface driver
PNP: No PS/2 controller found. Probing ports directly.
i8042.c: No controller found.
mice: PS/2 mouse device common for all mice
rtc_cmos rtc_cmos: rtc core: registered rtc_cmos as rtc0
device-mapper: uevent: version 1.0.3
device-mapper: ioctl: 4.16.0-ioctl (2009-11-05) initialised: dm-devel@redhat.com
cpuidle: using governor ladder
cpuidle: using governor menu
usbcore: registered new interface driver hiddev
usbcore: registered new interface driver usbhid
usbhid: USB HID core driver
nf_conntrack version 0.5.0 (3738 buckets, 14952 max)
CONFIG_NF_CT_ACCT is deprecated and will be removed soon. Please use
nf_conntrack.acct=1 kernel parameter, acct=1 nf_conntrack module option or
sysctl net.netfilter.nf_conntrack_acct=1 to enable it.
blkfront: xvda2: barriers enabled
ip_tables: (C) 2000-2006 Netfilter Core Team
TCP cubic registered
Initializing XFRM netlink socket
NET: Registered protocol family 17
registered taskstats version 1
No TPM chip found, activating TPM-bypass!
XENBUS: Device with no driver: device/console/0
  Magic number: 1:252:3141
drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
Initalizing network drop monitor service
Freeing unused kernel memory: 3392k freed
Write protecting the kernel read-only data: 10240k
Freeing unused kernel memory: 1436k freed
Freeing unused kernel memory: 1732k freed
Red Hat nash version 5.1.19.6 starting
Mounting proc filesystem
Mounting sysfs filesystem
Creating /dev
Creating initial device nodes
Setting up hotplug.
Creating block device nodes.
Scanning and configuring dmraid supported devices
Scanning logical volumes
  Reading all physical volumes.  This may take a while...
  Found volume group "VolGroup01" using metadata type lvm2
lvm used greatest stack depth: 4912 bytes left
Activating logical volumes
  2 logical volume(s) in volume group "VolGroup01" now active
Trying to resume from /dev/VolGroup01/LogVol01
No suspend signature on swap, not resuming.
Creating root device.
Mounting root filesystem.
EXT3-fs (dm-0): recovery required on readonly filesystem
EXT3-fs (dm-0): write access will be enabled during recovery
kjournald starting.  Commit interval 5 seconds
EXT3-fs (dm-0): recovery complete
EXT3-fs (dm-0): mounted filesystem with ordered data mode
Setting up other filesystems.
Setting up new root fs
no fstab.sys, mounting internal defaults
Switching to new root and running init.
unmounting old /dev
unmounting old /proc
unmounting old /sys
SELinux:  Disabled at runtime.
type=1404 audit(1272028615.520:2): selinux=0 auid=4294967295 ses=4294967295
INIT: version 2.86 booting
INIT: /etc/inittab[18]: rlevel field too long (max 11 characters)
uname used greatest stack depth: 4752 bytes left
mount used greatest stack depth: 3888 bytes left
                Welcome to gzip used greatest stack depth: 3872 bytes left
Red Hat Enterprise Linux Client
                Press 'I' to enter interactive startup.
modprobe used greatest stack depth: 3648 bytes left
Cannot access the Hardware Clock via any known method.
Use the --debug option to see the details of our search for an access method.
Setting clock  (utc): Fri Apr 23 06:16:56 PDT 2010 [  OK  ]
Starting udev: [  OK  ]
Loading default keymap (us): [  OK  ]
Setting hostname localhost.localdomain:  [  OK  ]
DM multipath kernel driver version too old
Setting up Logical Volume Management:   2 logical volume(s) in volume group "VolGroup01" now active
[  OK  ]
Checking filesystems
Checking all file systems.
[/sbin/fsck.ext3 (1) -- /] fsck.ext3 -a /dev/VolGroup01/LogVol00 
/dev/VolGroup01/LogVol00: clean, 1061367/60129280 files, 14836753/60121088 blocks
[/sbin/fsck.ext3 (1) -- /boot] fsck.ext3 -a LABEL=/boot 
fsck.ext3: Unable to resolve 'LABEL=/boot'
[FAILED]

*** An error occurred during the file system check.
*** Dropping you to a shell; the system will reboot
*** when you leave the shell.
Give root password for maintenance
(or type Control-D to continue): 
(Repair filesystem) 1 # 
(Repair filesystem) 1 # 


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Re: Xen Dom U kernel

[Konrad Rzeszutek Wilk]

On Fri, Apr 23, 2010 at 01:27:40PM -0700, kishore kumar wrote:
> Now I see something different in the console.

You got the kernel to boot, the initrd was able to see the disk
and mount the partition.

For posterity, what did you do from my last e-mail to get to this stage?


> Please find the attached console output and the guest configuration file.

That is normal /etc/fstab problem. You need to fix it (/etc/fstab) to have the right
partitions in it. If you don't understand this, look up on Google that
exact error.

Re: Xen Dom U kernel

[kishore kumar]

[-- Attachment #1.1: Type: text/plain, Size: 784 bytes --]

I only commented out extra = "4" option.
and tried to see my fdisk -l /dev/sda2.

Then ran xm creatr -c  with my guest config file.

THank YOu.

On Fri, Apr 23, 2010 at 1:37 PM, Konrad Rzeszutek Wilk <
konrad.wilk@oracle.com> wrote:

> On Fri, Apr 23, 2010 at 01:27:40PM -0700, kishore kumar wrote:
> > Now I see something different in the console.
>
> You got the kernel to boot, the initrd was able to see the disk
> and mount the partition.
>
> For posterity, what did you do from my last e-mail to get to this stage?
>
>
> > Please find the attached console output and the guest configuration file.
>
> That is normal /etc/fstab problem. You need to fix it (/etc/fstab) to have
> the right
> partitions in it. If you don't understand this, look up on Google that
> exact error.
>

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