xway issues / bugs

xway issues / bugs

[Muhammad Atif]

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Dear Developers,
I have tried using the interdomain communication patch for xen (Xway, http://sourceforge.net/projects/xway) a link of which is there at Xen wiki. I am having troubles getting it going. 
I am using AMD Opteron 248 (64-bit), with 2 GHz ram and IWILL motherboard. My distribution is ubuntu 7.04 and I am using Xen 3.0.3 for i686, as xway patch suggests that it is only for 32 bit systems. The GCC version is 4.1.2. I have also tried  xway on another machine which has 32 bit intel processor.
During the boot time, i see in the dmesg output giving me "net/ipv4/xway_proto.c:xsw_accept:143: inet_accept() err=-11" on Opteron. The intel 32 bit gives NO message of this type. Now to the heart of the issue
I can get the xway daemon and other related stuff loaded without any errors or warning. Upon simple ssh from one domU to another (i have compiled the ip addresses as instructed) i get a printf on screen on the receiving domain "client_sock = 5" and that is where both the domains stop processing i.e. ssh doe not seem to progress any further. strace is not helping me that much. I have noticed that xwayd.c (daemon) gives a write() call and this call is returning 0, instead of the message size.

Has anyone ever come across this error/bug? or simply has anyone ever tried xway? 


 
Best Regards,
Atif




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migrateDevices( ) ?

[tgh]

hi
  I read the code of migration,and i am confused about the function of 
migrateDevices(), it is called for 3times,and what is the function for 
it ? could someone help me out

Thanks in advance

Re: migrateDevices( ) ?

[Stefan Berger]

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xen-devel-bounces@lists.xensource.com wrote on 01/02/2008 01:41:56 AM:

> hi
>   I read the code of migration,and i am confused about the function of 
> migrateDevices(), it is called for 3times,and what is the function for 
> it ? could someone help me out

The purpose of this function is to enable the migration of 'external 
devices', i.e. this would be disk images or TPM state, from one physical 
machine to another while migrating a vm.

The prototype of the migrate function explains the different steps.

http://xenbits.xensource.com/xen-unstable.hg?file/2491691e3e69/tools/python/xen/xend/server/DevController.py


   Stefan

> 
> Thanks in advance
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@lists.xensource.com
> http://lists.xensource.com/xen-devel

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Re: migrateDevices( ) ?

[tgh]

hi
Thank you for your explanation
and when xen processes " live migration",xend will fork a process to do 
xc_linux_save,and also call the helphandler which will call 
migrateDevices() in three steps,that is ,migrateDevices() will copy the 
devices' state to the destination when the iterative pre-copying of the 
VM memory state is completed ,is it? or what is the tricks behind? i 
read DevController.py,but still not clear,
and i am confused about which code is called in the destination node to 
cooperate with for migration, that is ,on the destination node ,which 
code will invoke the receiving function there? is it httpserver? then 
,which function code will it call to receive ,or what to do ?i guess 
some functions will be called to deal with something ,then call the 
restore function or something, but which function is called before the 
restore function is called ? i am lost in it

Thanks in advance



Stefan Berger 写道:
>
> xen-devel-bounces@lists.xensource.com wrote on 01/02/2008 01:41:56 AM:
>
> > hi
> > I read the code of migration,and i am confused about the function of
> > migrateDevices(), it is called for 3times,and what is the function for
> > it ? could someone help me out
>
> The purpose of this function is to enable the migration of 'external 
> devices', i.e. this would be disk images or TPM state, from one 
> physical machine to another while migrating a vm.
>
> The prototype of the migrate function explains the different steps.
>
> http://xenbits.xensource.com/xen-unstable.hg?file/2491691e3e69/tools/python/xen/xend/server/DevController.py 
>
>
>
> Stefan
>
> >
> > Thanks in advance
> >
> > _______________________________________________
> > Xen-devel mailing list
> > Xen-devel@lists.xensource.com
> > http://lists.xensource.com/xen-devel

device models?

[tgh]

hi
  what does the device models mean in the xen? I read it in summit pdf 
and some code reference somewhere ,and i am not clear about it? what 
does it refer to?

Thanks in advance

Re: device models?

[Samuel Thibault]

tgh, le Fri 04 Jan 2008 13:59:19 +0800, a écrit :
>  what does the device models mean in the xen?

That's the program which emulates devices by answering to i/o requests.
Currently, that's basically a qemu process in dom0.

Samuel

migration and relocation server?

[tgh]

hi
I read the code of migration,and i have got some confusions, the source 
node sock connect the destination node with which port? 8000,is it ？and 
when migration is processing ,the relocation server is invoked ,is it ? 
and the relocation server is using port:8002? is it ?and the source node 
copy the memory state ,say dirty page, through port:8000 to the 
destination node, while the VM-migrating's networking data is send to 
relocation server, is it? or how does it work? could someone help me

Thanks in advance

code read problems

[tgh]

hi
  I try to read the code of migration,and there are some python code and 
some c code( in guestOS application) and some c code( in guestOS kernel 
) and some c code (in xen) , and i want to trace the processing path in 
these code , and how could i achieve it,
  in what way should i compile these code?

could someone  help me

Thanks in advance

Re: xway issues / bugs

[Mark Williamson]

Hi

Sorry you're having trouble with xway.  I've not tried it myself and I've also 
not known of anyone else actually running it...  It might be a good idea to 
try and contact the xway developers directly in case they don't read this 
list, or you could cc them on these e-mails..

Perhaps there's a contact e-mail address for the developers somewhere in the 
source code?

I have a Powerpoint presentation on Xway that I downloaded when it was first 
announced; the presentation was by "Kangho Kim, System Software Team, ETRI".  
ETRI = Electronics and Telecommunications Research Institute.  Maybe you can 
find some contact details for him through Google?

Cheers,
Mark

> Dear Developers,
> I have tried using the interdomain communication patch for xen (Xway,
> http://sourceforge.net/projects/xway) a link of which is there at Xen wiki.
> I am having troubles getting it going. I am using AMD Opteron 248 (64-bit),
> with 2 GHz ram and IWILL motherboard. My distribution is ubuntu 7.04 and I
> am using Xen 3.0.3 for i686, as xway patch suggests that it is only for 32
> bit systems. The GCC version is 4.1.2. I have also tried  xway on another
> machine which has 32 bit intel processor. During the boot time, i see in
> the dmesg output giving me "net/ipv4/xway_proto.c:xsw_accept:143:
> inet_accept() err=-11" on Opteron. The intel 32 bit gives NO message of
> this type. Now to the heart of the issue I can get the xway daemon and
> other related stuff loaded without any errors or warning. Upon simple ssh
> from one domU to another (i have compiled the ip addresses as instructed) i
> get a printf on screen on the receiving domain "client_sock = 5" and that
> is where both the domains stop processing i.e. ssh doe not seem to progress
> any further. strace is not helping me that much. I have noticed that
> xwayd.c (daemon) gives a write() call and this call is returning 0, instead
> of the message size.
>
> Has anyone ever come across this error/bug? or simply has anyone ever tried
> xway?
>
>
>
> Best Regards,
> Atif
>
>
>
>
>      
> ___________________________________________________________________________
>_________ Looking for last minute shopping deals?
> Find them fast with Yahoo! Search. 
> http://tools.search.yahoo.com/newsearch/category.php?category=shopping



-- 
Dave: Just a question. What use is a unicyle with no seat?  And no pedals!
Mark: To answer a question with a question: What use is a skateboard?
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