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Re: [Xen-devel] xway issues / bugs

  • To: Mark Williamson <mark.williamson@xxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
  • From: Muhammad Atif <m_atif_s@xxxxxxxxx>
  • Date: Mon, 7 Jan 2008 02:27:24 -0800 (PST)
  • Delivery-date: Mon, 07 Jan 2008 02:28:05 -0800
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  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>

Thanks for the reply. I did contact the developers but there was no reply perhaps my mail got lost in Christmas junks. I shall try to contact them again, in fact this email is bcc to the developers. I placed a help request at xway forum at source forge as well (though it contains only my initial observations, as xway only gets complied for x86-32). At the moment, I feel that xd.c (the xway driver) is causing the problems and the function is import_mem(...) and specific call is BUG_ON(HYPERVISOR_grant_table_op(GNTTABOP_map_grant_ref, ops, npage)); ...

I shall keep trying, as I think good work shall not go to waste.

Best Regards,
Muhammad Atif

----- Original Message ----
From: Mark Williamson <mark.williamson@xxxxxxxxxxxx>
To: xen-devel@xxxxxxxxxxxxxxxxxxx
Cc: Muhammad Atif <m_atif_s@xxxxxxxxx>
Sent: Saturday, January 5, 2008 4:57:59 AM
Subject: Re: [Xen-devel] xway issues / bugs


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?


> 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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