Re: Scrubbing free ram

[Bei Guan <gbtju85@gmail.com>]

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Hi, Konrad,

Thank you for your reply.

I think it is hard to solve the problem of installing xen4.0 on
fedora11_x86-32bit. Because everytime I install xen4.0 and reboot, my screen
stopped at the below messages and did not to print anything.

(XEN) traps.c:2309:d0 Domain attempted WRMSR 000002ff from 00000000:00000c06
> to 00000000:00000000.



Now, I change my domain0 OS to fedora11_x86-64bit and I can successfully
install the xen 4.0. However I have another problem. When I running the
command "xend start", I got the error messages:

[root@localhost ~]# xend start
ERROR Internal error: Could not obtain handle on privileged command
interface (2 = No such file or directory)
Traceback (most recent call last):
  File "/usr/sbin/xend", line 36, in <module>
    from xen.xend.server import SrvDaemon
  File "usr/lib64/python2.6/site-packages/xen/xend/server/SrvDaemon.py",
line 26, in <module>
  File "usr/lib64/python2.6/site-packages/xen/xend/server/relocate.py", line
28, in <module>
  File "usr/lib64/python2.6/site-packages/xen/xend/XendDomain.py", line 36,
in <module>
  File "usr/lib64/python2.6/site-packages/xen/xend/XendCheckpoint.py", line
20, in <module>
  File "usr/lib64/python2.6/site-packages/xen/xend/image.py", line 46, in
<module>
xen.lowlevel.xc.Error: (1, 'Internal error', 'Could not obtain handle on
privileged command interface (2 = No such file or directory)')

I googled the problem and found it seems to be a bug, which refered here:
http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1436



If I running another command "/etc/init.d/xend start", it can successfully
start the xend service. But I can not create a PV DomU or HVM DomU. The
error message as following.

1. Error of starting a PV DomU
[root@localhost ubuntu-32]# xm create ubuntu.9-04.x86.xen3.cfg -c
……  ……
[    1.831122] Sending DHCP requests ...
[   14.320061] ... timed out!
[   75.986391] IP-Config: Reopening network devices...
[   77.488086] Sending DHCP requests ...
[   93.965059] ... timed out!
[  165.740440] IP-Config: Auto-configuration of network failed.
[  165.740565] md: Waiting for all devices to be available before autodetect
[  165.740587] md: If you don't use raid, use raid=noautodetect
[  165.741555] md: Autodetecting RAID arrays.
[  165.741577] md: Scanned 0 and added 0 devices.
[  165.741596] md: autorun ...
[  165.741614] md: ... autorun DONE.
[  165.741921] Root-NFS: No NFS server available, giving up.
[  165.741984] VFS: Unable to mount root fs via NFS, trying floppy.
[  165.742429] VFS: Cannot open root device "sda1" or unknown-block(2,0)
[  165.742452] Please append a correct "root=" boot option; here are the
available partitions:
[  165.742529] ca01         1025024 xvda1 driver: vbd
[  165.742566] Kernel panic - not syncing: VFS: Unable to mount root fs on
unknown-block(2,0)
[  165.742590] Pid: 1, comm: swapper Not tainted 2.6.31.13 #1
[  165.742610] Call Trace:
[  165.742642]  [<ffffffff81591fd2>] panic+0x75/0x130
[  165.742674]  [<ffffffff8195fafe>] mount_block_root+0x1ce/0x1e5
[  165.742705]  [<ffffffff8195fb80>] mount_root+0x6b/0x8b
[  165.742734]  [<ffffffff8195fd10>] prepare_namespace+0x170/0x19d
[  165.742765]  [<ffffffff8195efc0>] kernel_init+0x1b5/0x1c5
[  165.742797]  [<ffffffff81033dea>] child_rip+0xa/0x20
[  165.742827]  [<ffffffff81032fa7>] ? int_ret_from_sys_call+0x7/0x1b
[  165.742858]  [<ffffffff8103375d>] ? retint_restore_args+0x5/0x6
[  165.742889]  [<ffffffff81033de0>] ? child_rip+0x0/0x20

(Attached is the complete messages)

2. Error of starting a HVM DomU
[root@localhost windowsxp]# xm create winxp2_xen4.hvm
Using config file "./winxp2_xen4.hvm".
Error: Domain 'WinXP_HVMDomain' does not exist.

("WinXP_HVMDomain" is my HVM DomU name)


Thank you for any reply.

Gavin Guan





2010/5/5 Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

> On Wed, Apr 28, 2010 at 11:44:13PM +0800, BEI GUAN wrote:
> > Hi,
> >
> > Sorry, I can not get the boot message through XenSerialConsole now.
> However,
> > attached are the screenshots of the last part of boot message.
> > If add "no-bootscrub" on the xen command line, the message is the same
> > except for the last line, "(XEN) Scrubbing Free RAM:". The grub.conf is
> as
> > following.
> >
> >  title Xen-4.0 (Linux kernel 2.6.31.13)
> >     root (hd0,10)
> >     kernel /boot/xen-4.0.gz dom0_mem=1024M loglvl=all guest_loglvl=all
> >     module /boot/vmlinuz-2.6.31.13 root=/dev/sda1 ro nomodeset
>
> Add 'console=hvc0 debug'
>
> Pasi mentioned what to look at:
> > > >>>>> Also please check this wiki page:
> > > >>>>> http://wiki.xensource.com/xenwiki/XenSerialConsole
>
> Look in the section titled: "Setting up the serial console in grub.conf'
> > > >>>>>
> > > >>>>> and:
> > > >>>>> http://wiki.xensource.com/xenwiki/XenParavirtOps
>

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[-- Attachment #2: error msg of starting PV DomU --]
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[root@localhost ubuntu-32]# xm create ubuntu.9-04.x86.xen3.cfg -c
Using config file "./ubuntu.9-04.x86.xen3.cfg".
Started domain ubuntu.9-04 (id=1)
                                 [    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Linux version 2.6.31.13 (root@localhost.localdomain) (gcc version 4.4.1 20090725 (Red Hat 4.4.1-2) (GCC) ) #1 SMP Tue May 4 18:15:12 CST 2010
[    0.000000] Command line: root=/dev/sda1 ro ip=:127.0.255.255::::eth0:dhcp 
[    0.000000] KERNEL supported cpus:
[    0.000000]   Intel GenuineIntel
[    0.000000]   AMD AuthenticAMD
[    0.000000]   Centaur CentaurHauls
[    0.000000] ACPI in unprivileged domain disabled
[    0.000000] released 0 pages of unused memory
[    0.000000] BIOS-provided physical RAM map:
[    0.000000]  Xen: 0000000000000000 - 00000000000a0000 (usable)
[    0.000000]  Xen: 00000000000a0000 - 0000000000100000 (reserved)
[    0.000000]  Xen: 0000000000100000 - 0000000010000000 (usable)
[    0.000000] DMI not present or invalid.
[    0.000000] last_pfn = 0x10000 max_arch_pfn = 0x400000000
[    0.000000] Scanning 1 areas for low memory corruption
[    0.000000] modified physical RAM map:
[    0.000000]  modified: 0000000000000000 - 0000000000001000 (usable)
[    0.000000]  modified: 0000000000001000 - 0000000000006000 (reserved)
[    0.000000]  modified: 0000000000006000 - 00000000000a0000 (usable)
[    0.000000]  modified: 00000000000a0000 - 0000000000100000 (reserved)
[    0.000000]  modified: 0000000000100000 - 0000000010000000 (usable)
[    0.000000] init_memory_mapping: 0000000000000000-0000000010000000
[    0.000000] (6 early reservations) ==> bootmem [0000000000 - 0010000000]
[    0.000000]   #0 [0000000000 - 0000001000]   BIOS data page ==> [0000000000 - 0000001000]
[    0.000000]   #1 [0001b93000 - 0001ba6000]   XEN PAGETABLES ==> [0001b93000 - 0001ba6000]
[    0.000000]   #2 [0000006000 - 0000008000]       TRAMPOLINE ==> [0000006000 - 0000008000]
[    0.000000]   #3 [0001000000 - 0001aef1f4]    TEXT DATA BSS ==> [0001000000 - 0001aef1f4]
[    0.000000]   #4 [0001b10000 - 0001b93000]   XEN START INFO ==> [0001b10000 - 0001b93000]
[    0.000000]   #5 [0000008000 - 0000074000]          PGTABLE ==> [0000008000 - 0000074000]
[    0.000000] Zone PFN ranges:
[    0.000000]   DMA      0x00000000 -> 0x00001000
[    0.000000]   DMA32    0x00001000 -> 0x00100000
[    0.000000]   Normal   0x00100000 -> 0x00100000
[    0.000000] Movable zone start PFN for each node
[    0.000000] early_node_map[3] active PFN ranges
[    0.000000]     0: 0x00000000 -> 0x00000001
[    0.000000]     0: 0x00000006 -> 0x000000a0
[    0.000000]     0: 0x00000100 -> 0x00010000
[    0.000000] SMP: Allowing 1 CPUs, 0 hotplug CPUs
[    0.000000] No local APIC present
[    0.000000] APIC: disable apic facility
[    0.000000] PM: Registered nosave memory: 0000000000001000 - 0000000000006000
[    0.000000] PM: Registered nosave memory: 00000000000a0000 - 0000000000100000
[    0.000000] Allocating PCI resources starting at 10000000 (gap: 10000000:f0000000)
[    0.000000] NR_CPUS:8 nr_cpumask_bits:8 nr_cpu_ids:1 nr_node_ids:1
[    0.000000] PERCPU: Allocated 22 4k pages, static data 88160 bytes
[    0.000000] Xen: using vcpu_info placement
[    0.000000] Built 1 zonelists in Zone order, mobility grouping on.  Total pages: 64428
[    0.000000] Kernel command line: root=/dev/sda1 ro ip=:127.0.255.255::::eth0:dhcp 
[    0.000000] PID hash table entries: 1024 (order: 10, 8192 bytes)
[    0.000000] Dentry cache hash table entries: 32768 (order: 6, 262144 bytes)
[    0.000000] Inode-cache hash table entries: 16384 (order: 5, 131072 bytes)
[    0.000000] Initializing CPU#0
[    0.000000] Checking aperture...
[    0.000000] No AGP bridge found
[    0.000000] Memory: 245060k/262144k available (5739k kernel code, 404k absent, 16376k reserved, 3763k data, 572k init)
[    0.000000] SLUB: Genslabs=13, HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[    0.000000] Hierarchical RCU implementation.
[    0.000000] NR_IRQS:4352 nr_irqs:256
[    0.000000] Detected 2660.072 MHz processor.
[    0.000999] Console: colour dummy device 80x25
[    0.000999] console [tty0] enabled
[    0.000999] console [hvc0] enabled
[    0.000999] installing Xen timer for CPU 0
[    0.000999] xen: vcpu_time_info placement not supported
[    0.000999] Calibrating delay loop (skipped), value calculated using timer frequency.. 5320.14 BogoMIPS (lpj=2660072)
[    0.000999] Security Framework initialized
[    0.000999] SELinux:  Initializing.
[    0.000999] Mount-cache hash table entries: 256
[    0.000999] Initializing cgroup subsys ns
[    0.000999] Initializing cgroup subsys cpuacct
[    0.000999] Initializing cgroup subsys freezer
[    0.000999] CPU: L1 I cache: 32K, L1 D cache: 32K
[    0.000999] CPU: L2 cache: 3072K
[    0.000999] CPU: Unsupported number of siblings 4
[    0.000999] Performance Counters: unsupported p6 CPU model 23 no PMU driver, software counters only.
[    0.000999] SMP alternatives: switching to UP code
[    0.001059] Freeing SMP alternatives: 39k freed
[    0.001247] cpu 0 spinlock event irq 254
[    0.001620] Brought up 1 CPUs
[    0.003047] Booting paravirtualized kernel on Xen
[    0.003063] Xen version: 4.0.0 (preserve-AD)
[    0.003666] Grant tables using version 2 layout.
[    0.003701] Grant table initialized
[    0.023388] Time: 165:165:165  Date: 165/165/65
[    0.023631] NET: Registered protocol family 16
[    0.024763] xenbus_probe wake_waiting
[    0.024789] xenbus_probe_init ok
[    0.026995] PCI: setting up Xen PCI frontend stub
[    0.064982] bio: create slab <bio-0> at 0
[    0.065493] ACPI: Interpreter disabled.
[    0.066224] xenbus_probe_backend_init bus registered ok
[    0.066241] xenbus_probe_devices backend
[    0.067113] xenbus_probe_devices failed xenbus_directory
[    0.067113] backend_probe_and_watch devices probed ok
[    0.067113] backend_probe_and_watch watch add ok ok
[    0.067113] backend_probe_and_watch all done
[    0.067266] xenbus_probe_frontend_init bus registered ok
[    0.067282] xenbus_probe_devices device
[    0.067304] xenbus_probe_devices 1/3 vbd
[    0.067304] xenbus_probe_device_type type vbd
[    0.068052] xenbus_probe_device_type 1/1 2049
[    0.068247] xenbus_probe_device_type done
[    0.068262] xenbus_probe_devices 2/3 vif
[    0.068276] xenbus_probe_device_type type vif
[    0.068299] xenbus_probe_device_type 1/1 0
[    0.068299] xenbus_probe_device_type done
[    0.068299] xenbus_probe_devices 3/3 console
[    0.068299] xenbus_probe_device_type type console
[    0.068299] xenbus_probe_device_type 1/1 0
[    0.069190] xenbus_probe_device_type done
[    0.069205] xenbus_probe_devices done
[    0.069219] frontend_probe_and_watch devices probed ok
[    0.069245] frontend_probe_and_watch watch add ok ok
[    0.069245] frontend_probe_and_watch all done
[    0.069245] xen_balloon: Initialising balloon driver with page order 0.
[    0.070756] SCSI subsystem initialized
[    0.072096] usbcore: registered new interface driver usbfs
[    0.072304] usbcore: registered new interface driver hub
[    0.072564] usbcore: registered new device driver usb
[    0.073828] PCI: System does not support PCI
[    0.073845] PCI: System does not support PCI
[    0.074882] cfg80211: Using static regulatory domain info
[    0.074899] cfg80211: Regulatory domain: US
[    0.074913] 	(start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
[    0.074929] 	(2402000 KHz - 2472000 KHz @ 40000 KHz), (600 mBi, 2700 mBm)
[    0.074988] 	(5170000 KHz - 5190000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
[    0.074988] 	(5190000 KHz - 5210000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
[    0.074988] 	(5210000 KHz - 5230000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
[    0.074988] 	(5230000 KHz - 5330000 KHz @ 40000 KHz), (600 mBi, 2300 mBm)
[    0.074988] 	(5735000 KHz - 5835000 KHz @ 40000 KHz), (600 mBi, 3000 mBm)
[    0.075093] cfg80211: Calling CRDA for country: US
[    0.075283] NetLabel: Initializing
[    0.075298] NetLabel:  domain hash size = 128
[    0.075312] NetLabel:  protocols = UNLABELED CIPSOv4
[    0.075349] NetLabel:  unlabeled traffic allowed by default
[    0.076598] Xen: Initializing Xen DMA ops
[    0.083723] pnp: PnP ACPI: disabled
[    0.086882] NET: Registered protocol family 2
[    0.087610] IP route cache hash table entries: 2048 (order: 2, 16384 bytes)
[    0.089821] TCP established hash table entries: 8192 (order: 5, 131072 bytes)
[    0.089872] TCP bind hash table entries: 8192 (order: 5, 131072 bytes)
[    0.089918] TCP: Hash tables configured (established 8192 bind 8192)
[    0.089936] TCP reno registered
[    0.090329] NET: Registered protocol family 1
[    0.090585] kvm: no hardware support
[    0.090602] has_svm: not amd
[    0.090616] kvm: no hardware support
[    0.091549] platform rtc_cmos: registered platform RTC device (no PNP device found)
[    0.093437] microcode: no support for this CPU vendor
[    0.093454] Scanning for low memory corruption every 60 seconds
[    0.094588] audit: initializing netlink socket (disabled)
[    0.094623] type=2000 audit(1273071195.128:1): initialized
[    0.102342] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[    0.116352] VFS: Disk quotas dquot_6.5.2
[    0.116980] Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[    0.121526] msgmni has been set to 479
[    0.124490] alg: No test for stdrng (krng)
[    0.124999] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252)
[    0.125066] io scheduler noop registered
[    0.125082] io scheduler anticipatory registered
[    0.125099] io scheduler deadline registered
[    0.125141] io scheduler cfq registered (default)
[    0.125700] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
[    0.126892] Event-channel device installed.
[    0.131336] blktap_device_init: blktap device major 253
[    0.131367] blktap_ring_init: blktap ring major: 251
[    0.132747] registering netback
[    0.150594] Non-volatile memory driver v1.3
[    0.150665] Linux agpgart interface v0.103
[    0.151137] [drm] Initialized drm 1.1.0 20060810
[    0.151205] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[    0.162465] brd: module loaded
[    0.167232] loop: module loaded
[    0.170755] input: Macintosh mouse button emulation as /devices/virtual/input/input0
[    0.174839] Intel(R) PRO/1000 Network Driver - version 7.3.21-k3-NAPI
[    0.174859] Copyright (c) 1999-2006 Intel Corporation.
[    0.175095] blkfront: xvda1: barriers enabled
[    0.175351] e1000e: Intel(R) PRO/1000 Network Driver - 1.0.2-k2
[    0.175368] e1000e: Copyright (c) 1999-2008 Intel Corporation.
[    0.176309] e100: Intel(R) PRO/100 Network Driver, 3.5.24-k2-NAPI
[    0.176326] e100: Copyright(c) 1999-2006 Intel Corporation
[    0.177196] sky2 driver version 1.23
[    0.177567] Initialising Xen virtual ethernet driver.
[    0.182480] console [netcon0] enabled
[    0.182501] netconsole: network logging started
[    0.182516] Fusion MPT base driver 3.04.10
[    0.182530] Copyright (c) 1999-2008 LSI Corporation
[    0.182578] Fusion MPT FC Host driver 3.04.10
[    0.182772] Fusion MPT misc device (ioctl) driver 3.04.10
[    0.183136] mptctl: Registered with Fusion MPT base driver
[    0.183152] mptctl: /dev/mptctl @ (major,minor=10,220)
[    0.184353] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    0.274700] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    0.274979] uhci_hcd: USB Universal Host Controller Interface driver
[    0.275835] usbcore: registered new interface driver usblp
[    0.275856] Initializing USB Mass Storage driver...
[    0.276327] usbcore: registered new interface driver usb-storage
[    0.276347] USB Mass Storage support registered.
[    0.276809] usbcore: registered new interface driver libusual
[    0.278371] PNP: No PS/2 controller found. Probing ports directly.
[    0.279012] i8042.c: No controller found.
[    0.279809] mice: PS/2 mouse device common for all mice
[    0.281338] rtc_cmos rtc_cmos: rtc core: registered rtc_cmos as rtc0
[    0.283587] device-mapper: ioctl: 4.15.0-ioctl (2009-04-01) initialised: dm-devel@redhat.com
[    0.283965] cpuidle: using governor ladder
[    0.283981] cpuidle: using governor menu
[    0.289600] usbcore: registered new interface driver hiddev
[    0.289798] usbcore: registered new interface driver usbhid
[    0.289819] usbhid: v2.6:USB HID core driver
[    0.290166] Advanced Linux Sound Architecture Driver Version 1.0.20.
[    0.292325] ALSA device list:
[    0.292341]   No soundcards found.
[    0.292523] Netfilter messages via NETLINK v0.30.
[    0.292580] nf_conntrack version 0.5.0 (1996 buckets, 7984 max)
[    0.293952] ctnetlink v0.93: registering with nfnetlink.
[    0.301812] ip_tables: (C) 2000-2006 Netfilter Core Team
[    0.301855] TCP cubic registered
[    0.301870] Initializing XFRM netlink socket
[    0.303000] NET: Registered protocol family 10
[    0.317809] ip6_tables: (C) 2000-2006 Netfilter Core Team
[    0.318300] IPv6 over IPv4 tunneling driver
[    0.326894] NET: Registered protocol family 17
[    0.328758] RPC: Registered udp transport module.
[    0.328776] RPC: Registered tcp transport module.
[    0.329632] registered taskstats version 1
[    0.329683] XENBUS: Device with no driver: device/console/0
[    0.329724]   Magic number: 1:252:3141
[    1.831122] Sending DHCP requests ...
[   14.320061] ... timed out!
[   75.986391] IP-Config: Reopening network devices...
[   77.488086] Sending DHCP requests ...
[   93.965059] ... timed out!
[  165.740440] IP-Config: Auto-configuration of network failed.
[  165.740565] md: Waiting for all devices to be available before autodetect
[  165.740587] md: If you don't use raid, use raid=noautodetect
[  165.741555] md: Autodetecting RAID arrays.
[  165.741577] md: Scanned 0 and added 0 devices.
[  165.741596] md: autorun ...
[  165.741614] md: ... autorun DONE.
[  165.741921] Root-NFS: No NFS server available, giving up.
[  165.741984] VFS: Unable to mount root fs via NFS, trying floppy.
[  165.742429] VFS: Cannot open root device "sda1" or unknown-block(2,0)
[  165.742452] Please append a correct "root=" boot option; here are the available partitions:
[  165.742529] ca01         1025024 xvda1 driver: vbd
[  165.742566] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(2,0)
[  165.742590] Pid: 1, comm: swapper Not tainted 2.6.31.13 #1
[  165.742610] Call Trace:
[  165.742642]  [<ffffffff81591fd2>] panic+0x75/0x130
[  165.742674]  [<ffffffff8195fafe>] mount_block_root+0x1ce/0x1e5
[  165.742705]  [<ffffffff8195fb80>] mount_root+0x6b/0x8b
[  165.742734]  [<ffffffff8195fd10>] prepare_namespace+0x170/0x19d
[  165.742765]  [<ffffffff8195efc0>] kernel_init+0x1b5/0x1c5
[  165.742797]  [<ffffffff81033dea>] child_rip+0xa/0x20
[  165.742827]  [<ffffffff81032fa7>] ? int_ret_from_sys_call+0x7/0x1b
[  165.742858]  [<ffffffff8103375d>] ? retint_restore_args+0x5/0x6
[  165.742889]  [<ffffffff81033de0>] ? child_rip+0x0/0x20


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