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[Xen-users] Problem with tap:aio

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] Problem with tap:aio
From: Mozafar Roshany <mzfroshany@xxxxxxxxx>
Date: Sun, 20 Dec 2009 15:16:28 +0330
Delivery-date: Sun, 20 Dec 2009 03:47:52 -0800
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Hi all

I was reading through Xen 3 user manual and saw this tap:aio should be used instead of loopback...
Then I came to do that, but I can get it working with replacing `file' URI's with `tap:aio'.

My OS: Debian Lenny 2.6.26-2-xen-amd64

DomU Xen configuration file:

kernel      = '/boot/vmlinuz-2.6.26-2-xen-amd64'
ramdisk     = '/boot/initrd.img-2.6.26-2-xen-amd64'
memory      = '1024'
root        = '/dev/xvda1 ro'
disk        = [
                  'tap:aio:/xen/domains/test1/manu.img,xvda1,w',
                  'tap:aio:/xen/domains/test1/disk.img,xvda2,w',
              ]
name        = 'test1'
vif         = [ 'ip=10.1.1.50,mac=00:16:3E:51:E4:AD' ]
>on_reboot   = 'restart'
on_crash    = 'restart'

The errors from console:

[    0.872134] Capability LSM initialized
[    0.872151] Mount-cache hash table entries: 256
[    0.872282] Initializing cgroup subsys ns
[    0.872290] Initializing cgroup subsys cpuacct
[    0.872295] Initializing cgroup subsys devices
[    0.872326] CPU: L1 I cache: 32K, L1 D cache: 32K
[    0.872333] CPU: L2 cache: 6144K
[    0.872340] CPU: Physical Processor ID: 1
[    0.872344] CPU: Processor Core ID: 3
[    0.872356] SMP alternatives: switching to UP code
[    0.879420] Freeing SMP alternatives: 21k freed
[    0.879535] Brought up 1 CPUs
[    0.881865] net_namespace: 1224 bytes
[    0.882025] NET: Registered protocol family 16
[    0.883053] Brought up 1 CPUs
[    0.883068] PCI: Fatal: No config space access function found
[    0.883075] PCI: setting up Xen PCI frontend stub
[    0.883750] ACPI: Interpreter disabled.
[    0.883758] Linux Plug and Play Support v0.97 (c) Adam Belay
[    0.883790] pnp: PnP ACPI: disabled
[    0.883979] suspend: event channel 7
[    0.884329] xen_mem: Initialising balloon driver.
[    0.885871] usbcore: registered new interface driver usbfs
[    0.885931] usbcore: registered new interface driver hub
[    0.885977] usbcore: registered new device driver usb
[    0.886139] PCI: System does not support PCI
[    0.886145] PCI: System does not support PCI
[    0.898148] NET: Registered protocol family 2
[    0.933769] IP route cache hash table entries: 32768 (order: 6, 262144 bytes)
[    0.934013] TCP established hash table entries: 131072 (order: 9, 2097152 bytes)
[    0.934815] TCP bind hash table entries: 65536 (order: 8, 1048576 bytes)
[    0.935207] TCP: Hash tables configured (established 131072 bind 65536)
[    0.935213] TCP reno registered
[    0.945775] NET: Registered protocol family 1
[    0.945859] checking if image is initramfs... it is
[    0.951155] Freeing initrd memory: 5252k freed
[    0.952017] platform rtc_cmos: registered platform RTC device (no PNP device found)
[    0.952017] audit: initializing netlink socket (disabled)
[    0.952017] type=2000 audit(1261321342.173:1): initialized
[    0.952017] VFS: Disk quotas dquot_6.5.1
[    0.952017] Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[    0.952017] msgmni has been set to 2058
[    0.952017] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 253)
[    0.952017] io scheduler noop registered
[    0.952017] io scheduler anticipatory registered
[    0.952017] io scheduler deadline registered
[    0.952017] io scheduler cfq registered (default)
[    0.953902] Linux agpgart interface v0.103
[    0.953947] Serial: 8250/16550 driver $Revision: 1.90 $ 4 ports, IRQ sharing enabled
[    0.955284] brd: module loaded
[    0.955342] input: Macintosh mouse button emulation as /class/input/input0
[    0.955404] Xen virtual console successfully installed as hvc0
[    0.955451] Event-channel device installed.
[    0.960690] netfront: Initialising virtual ethernet driver.
[    0.961761] PNP: No PS/2 controller found. Probing ports directly.
[    0.962588] i8042.c: No controller found.
[    0.976078] mice: PS/2 mouse device common for all mice
[    0.976184] rtc_cmos rtc_cmos: rtc core: registered rtc_cmos as rtc0
[    0.976298] No iBFT detected.
[    0.976641] TCP cubic registered
[    0.976647] NET: Registered protocol family 17
[    0.976739] registered taskstats version 1
[    6.077230] XENBUS: Waiting for devices to initialise: 295s...290s...285s...280s...275s...270s...265s...260s...255s...250s...245s...240s...235s...230s...225s...220s...215s...210s...205s...200s...195s...190s...185s...180s...175s...170s...165s...160s...155s...150s...145s...140s...135s...130s...125s...120s...115s...110s...105s...100s...95s...90s...85s...80s...75s...70s...65s...60s...55s...50s...45s...40s...35s...30s...25s...20s...15s...10s...5s...0s...
[  301.076163] XENBUS: Timeout connecting to device: device/vbd/2050 (local state 3, remote state 2)
[  301.076173] XENBUS: Device not ready: device/vbd/2050
[  301.076179] XENBUS: Device with no driver: device/console/0
[  301.076186] drivers/rtc/hctosys.c: unable to open rtc device (rtc0)
[  301.076209] Freeing unused kernel memory: 216k freed
Loading, please wait...
Begin: Loading essential drivers ... [  301.123168] SCSI subsystem initialized
[  301.124278] HP CISS Driver (v 3.6.20)
done.
Begin: Running /scripts/init-premount ... FATAL: Error inserting fan (/lib/modules/2.6.26-2-xen-amd64/kernel/drivers/acpi/fan.ko): No such device
WARNING: Error inserting processor (/lib/modules/2.6.26-2-xen-amd64/kernel/drivers/acpi/processor.ko): No such device
[  301.172668] thermal: Unknown symbol acpi_processor_set_thermal_limit
FATAL: Error inserting thermal (/lib/modules/2.6.26-2-xen-amd64/kernel/drivers/acpi/thermal.ko): Unknown symbol in module, or unknown parameter (see dmesg)
done.
Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done.
Begin: Waiting for root file system ...
done.
Gave up waiting for root device.  Common problems:
 - Boot args (cat /proc/cmdline)
   - Check rootdelay= (did the system wait long enough?)
   - Check root= (did the system wait for the right device?)
 - Missing modules (cat /proc/modules; ls /dev)
ALERT! /dev/sda2 does not exist. Dropping to a shell!


BusyBox v1.10.2 (Debian 1:1.10.2-2) built-in shell (ash)
Enter 'help' for a list of built-in commands.

/bin/sh: can't access tty; job control turned off
(initramfs)
=========================================

I modprobed the xenblktap module and also googled, but no success.

Thanks for any comment.




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