Re: Error in Hyper-V modules hv_vmbus

From: jdossantos
Date: Wed May 04 2011 - 05:48:32 EST


> > -----Original Message-----
> > From: root@xxxxxxxxxxxxxxxxxx [mailto:root@xxxxxxxxxxxxxxxxxx]
> > Sent: Tuesday, May 03, 2011 10:52 AM
> > To: KY Srinivasan
> > Cc: linux-kernel@xxxxxxxxxxxxxxx
> > Subject: RE: Error in Hyper-V modules hv_vmbus
> >
> > On Tue, 3 May 2011 13:42:43 +0000, KY Srinivasan wrote:
> > >> -----Original Message-----
> > >> From: root [mailto:root@xxxxxxxxxxxxxxxxxx]
> > >> Sent: Sunday, May 01, 2011 8:37 AM
> > >> To: KY Srinivasan
> > >> Cc: linux-kernel@xxxxxxxxxxxxxxx
> > >> Subject: Re: Error in Hyper-V modules hv_vmbus
> > >>
> > >> Windows Server Core 2008 R2 with SP2
> > >
> > > This is a known problem and a fix has been submitted - the patch
> > > is yet to be applied though. Once the hv patches that are in the
> > > queue are applied, this problem will be fixed. In the interim, if
> > > you want an immediate fix, I could send you the patch that will
> > > apply against the tree you have.
> > >
> > > Regards,
> > >
> > > K. Y
> > >>
> > >> Regards
> > >> Juan Dos Santos
> >
> > Could You send me the patch? So I can test it, I am using the
> > kernel source from
> > http://www.kernel.org/pub/linux/kernel/v2.6/testing/linux-2.6.39-rc5
> > .t ar.bz2, is the patch compatible with this kernel source?
>
> This is a very old version of the hyper-V driver code compared to what
> is in Greg's tree and looking at the code It does not look like the
> problem you are seeing is the problem my patch fixes. We will do some
> additional testing and get back to you. It would be very useful if you
> can post the dmesg or stack trace that can shed additional light on the
problem.

Juan,

I just fixed a few issues in Ubuntu 10.10 that might be similar.

I will spin up a debian system and see if I can reproduce the problem and
submit a patch To fix it.

Hank.

Here is my step by step protocol:

VM configuration:
Host: Windows Server 2008 Core R2 with SP1
Networkcard: Old emulated card
Integratedservices: Shutdown, Timesync, Heartbeat
CPU: 4
Memory: 512 MB
Harddisk: IDE 10 GB

OS Installation:
Debian Squeeze 6.0.1a (2.6.32-5-amd64)
Standard installation without any installation packages

Kernel installation:
aptitude install kernel-package libncurses-dev
cd /usr/src
wget http://www.kernel.org/pub/linux/kernel/v2.6/testing/linux-2.6.39-rc6.tar.bz2
tar xfvj linux-2.6.39-rc6.tar.bz2
cd linux-2.6.39-rc6/
make clean
make mrproper
cp /boot/config-2.6.32-5-amd64 .config
make menuconfig

{Divice Drivers -> Stagin Drivers -> <M> Microsoft Hyper-V client drivers}
Here You can find the .config file http://docs.homelinux.org/hv/.config


export CUNCURRENCY_LEVEL=4
make-kpkg --append-to-version "-hyperv" --revision "1" --us --uc --initrd kernel_image kernel_headers
cd ..
dpkg -i linux-image-2.6.39-rc6-hyperv_1_amd64.deb linux-headers-2.6.39-rc6-hyperv_1_amd64.deb
ls -l /boot/
total 27640
-rw-r--r-- 1 root root 106088 Mar 8 01:18 config-2.6.32-5-amd64
-rw-r--r-- 1 root root 125214 May 4 11:31 config-2.6.39-rc6-hyperv
drwxr-xr-x 3 root root 4096 May 4 12:56 grub
-rw-r--r-- 1 root root 9095609 May 4 09:10 initrd.img-2.6.32-5-amd64
-rw-r--r-- 1 root root 10388314 May 4 12:56 initrd.img-2.6.39-rc6-hyperv
-rw-r--r-- 1 root root 1662514 Mar 8 01:18 System.map-2.6.32-5-amd64
-rw-r--r-- 1 root root 1839410 May 4 12:52 System.map-2.6.39-rc6-hyperv
-rw-r--r-- 1 root root 2418720 Mar 8 01:12 vmlinuz-2.6.32-5-amd64
-rw-r--r-- 1 root root 2590800 May 4 12:52 vmlinuz-2.6.39-rc6-hyperv
reboot

After the reboot I get the "INFO: task modprobe:307 blocked for more than 120 seconds." message
and boot is haning for 170 seconds, here are the logs:
http://docs.homelinux.org/hv/syslog
http://docs.homelinux.org/hv/messages
http://docs.homelinux.org/hv/dmesg

lsmod | grep hv_
hv_timesource 1055 0 [permanent]
hv_vmbus 48554 1

In the logs and with lsmod i see the timesource module running, but the time is not in sync with the windows host.
Shutdown function also dosn't work, seems that nothing of the integrated components are working..hv_netvsc,hv_blkvsc,hv_storvsc are not
loaded?! But modinfo provides information:

modinfo hv_vmbus
filename: /lib/modules/2.6.39-rc6-hyperv/kernel/drivers/staging/hv/hv_vmbus.ko
version: 3.1
license: GPL
srcversion: 334F59AED9605F8C3B7696F
alias: pci:v00001414d00005353sv*sd*bc*sc*i*
alias: dmi*:svn*MicrosoftCorporation*:pn*VirtualMachine*:rn*VirtualMachine*:
depends:
staging: Y
vermagic: 2.6.39-rc6-hyperv SMP mod_unload modversions
parm: vmbus_irq:int
parm: vmbus_loglevel:int

modinfo hv_timesource
filename: /lib/modules/2.6.39-rc6-hyperv/kernel/drivers/staging/hv/hv_timesource.ko
license: GPL
author: K. Y. Srinivasan <ksrinivasan@xxxxxxxxxx>
description: HyperV based clocksource
alias: pci:v00001414d00005353sv*sd*bc*sc*i*
alias: dmi*:svn*MicrosoftCorporation*:pn*VirtualMachine*:rn*VirtualMachine*:
depends:
staging: Y
vermagic: 2.6.39-rc6-hyperv SMP mod_unload modversions

modinfo hv_netvsc
filename: /lib/modules/2.6.39-rc6-hyperv/kernel/drivers/staging/hv/hv_netvsc.ko
description: Microsoft Hyper-V network driver
version: 3.1
license: GPL
srcversion: EA7C82EAB799B90B4F6BFA6
alias: pci:v00001414d00005353sv*sd*bc*sc*i*
alias: dmi*:svn*MicrosoftCorporation*:pn*VirtualMachine*:rn*VirtualMachine*:
depends: hv_vmbus
staging: Y
vermagic: 2.6.39-rc6-hyperv SMP mod_unload modversions
parm: ring_size:Ring buffer size (# of pages) (int)

modinfo hv_storvsc
filename: /lib/modules/2.6.39-rc6-hyperv/kernel/drivers/staging/hv/hv_storvsc.ko
description: Microsoft Hyper-V virtual storage driver
version: 3.1
license: GPL
srcversion: 23688D30D5A66982D2BB67F
depends: scsi_mod,hv_vmbus
staging: Y
vermagic: 2.6.39-rc6-hyperv SMP mod_unload modversions
parm: storvsc_ringbuffer_size:Ring buffer size (bytes) (int)

modinfo hv_blkvsc
filename: /lib/modules/2.6.39-rc6-hyperv/kernel/drivers/staging/hv/hv_blkvsc.ko
description: Microsoft Hyper-V virtual block driver
version: 3.1
license: GPL
srcversion: 5B375CF1D6F5581A05B1026
depends: scsi_mod,hv_vmbus
staging: Y
vermagic: 2.6.39-rc6-hyperv SMP mod_unload modversions
parm: blkvsc_ringbuffer_size:int
parm: ring_size:Ring buffer size (in bytes)


After that I enabled the synthetic network card, but also here..it doesn't work and I don't see any hv_netvsc
module loaded, so I tried to load it "by hand" with modprobe hv_netvsc..but I get a modprobe timeout and nothing happens..

Can someone repruduce it? Is there a patch for kernel linux-2.6.39-rc6?

Regards
Juan Dos Santos


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