Re: [Xen-devel] Xen Dom U kernel

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@xxxxxxxxxxxxxxxxxxxxx) (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

... 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

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

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

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@xxxxxxxxxx

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.

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

[<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@xxxxxx> 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@xxxxxx> 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@xxxxxx

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Re: [Xen-devel] Xen Dom U kernel