Re: [Xen-users] gplpv 0.8.4 not removing gemu harddisk and rtl 8139 network card

[Mark Williamson <mark.williamson@xxxxxxxxxxxx>]

Be careful not to run the VM with both the Qemu and PV drivers active for the 
same disk device.  If the filesystems provided by both drivers are accessed 
simultaneously then, because they really refer to the same disk, it will 
*definitely* destroy your filesystem.

If you end up with two devices pointing to the same underlying disk filesystem 
and there's /even a chance/ that they're both being mounted and accessed (I 
guess this probably happens automatically under Windows, so I'd assume it's 
very likely) you should xm destroy the domain right away unless you have a 
really clear idea what you're doing and are very convinced it's OK.  Don't 
even wait for the domain to shutdown cleanly.

Sorry for the dire-sounding warnings but it's worth emphasising.  Modern 
filesystems can only cope with one writer; if you have two "devices" pointing 
to the same area of disk then you end up with two writers to the same 
filesystem.  That's just certain to hose your filesystem *unless* you 
deliberately take very specific measures to make it behave safely.

Cheers,
Mark

On Thursday 28 February 2008, Hinrich Aue wrote:
> Hello list,
>
>
>
> I'm trying the gplpv drivers since a while now.
>
> Had problems, but as far as I can see progress is fast.
>
>
>
> I tried 0.8.4, but even with /gplpv switch in boot.ini the qemu harddisk
> and rtl 8139 network adapter is still being used.
>
>
>
> (This was different with previous versions, though I had BSOD on bigger
> network loads)
>
>
>
> Am I doing something wrong?
>
> Is my cfg file correct?
>
> Are gplpv drivers working with my en version?
>
>
>
> host                   : lci-srv3
>
> release                : 2.6.18-xen
>
> version                : #1 SMP Fri May 18 16:01:42 BST 2007
>
> machine                : x86_64
>
> nr_cpus                : 8
>
> nr_nodes               : 1
>
> sockets_per_node       : 2
>
> cores_per_socket       : 2
>
> threads_per_core       : 2
>
> cpu_mhz                : 3192
>
> hw_caps                :
> bfebfbff:20100800:00000000:00000180:0000e43d:00000000:00000001
>
> total_memory           : 4095
>
> free_memory            : 527
>
> xen_major              : 3
>
> xen_minor              : 1
>
> xen_extra              : .0
>
> xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32
> hvm-3.0-x86_32p hvm-3.0-x86_64
>
> xen_scheduler          : credit
>
> xen_pagesize           : 4096
>
> platform_params        : virt_start=0xffff800000000000
>
> xen_changeset          : Fri May 18 15:44:01 2007 +0100 15041:2d268f9a6a8b
>
> cc_compiler            : gcc version 3.4.4 20050314 (prerelease) (Debian
> 3.4.3-13)
>
> cc_compile_by          : shand
>
> cc_compile_domain      : localdomain
>
> cc_compile_date        : Fri May 18 15:44:17 BST 2007
>
> xend_config_format     : 4
>
>
>
> config file:
>
>
>
>
>
>
>
> kernel = '/usr/lib/xen/boot/hvmloader'
>
> builder = 'hvm'
>
> memory = '512'
>
> device_model='/usr/lib/xen/bin/qemu-dm'
>
>
>
> # Disks
>
> disk = [ 'phy:/dev/lci/gplpvTest,ioemu:hda,w',
>
>
> 'file:/root/images/Win2003Std/ISO/32BIT/STANDARD/DISC1_VLP/DE_WINDOWS_S$
>
>
>
> # Hostname
>
> name = 'lci-xen-gplpv-test'
>
>
>
> # Networking
>
> vif = ['bridge=xenbr0']
>
>
>
> # Behaviour
>
> boot='c'
>
> vnc=1
>
> vncviewer=0
>
> sdl=0
>
> vcpus=2
>
>
>
>
>
> Another question
>
> Are there any resources to the gplpv drivers except the mailing list? Like
> a wiki or a homepage?
>
>
>
> Thanks,
>
>             Hinrich



-- 
Push Me Pull You - Distributed SCM tool (http://www.cl.cam.ac.uk/~maw48/pmpu/)

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