Re: [uml-devel] Network related UML Crashing

[Richard Weinberger <richard@sigma-star.at>]

Am Sat, 12 Jan 2013 19:31:13 +0100 (CET)
schrieb "Dave Humphreys (Bob)" <dave@bob-the-boat.me.uk>:

> Re: [uml-devel] "Couldn't grant pty"
> 
> Now that I have been able to run the Debiam 32 bit root_fs, I have
> returned to the network related crashing.
> 
> This is by way of a status update, I will do more to tie down what is
> required to demonstrate the problem as simply as possible.
> 
> However:
> 
> root@DEB1-32:~# rsync --archive --progress
> 10.0.10.30:/var/imap/ /var/imap/ The authenticity of host '10.0.10.30
> (10.0.10.30)' can't be established. RSA key fingerprint is
> ce:e4:0d:88:c0:07:01:8d:10:f8:91:52:b5:4b:e1:53. Are you sure you
> want to continue connecting (yes/no)? yes Warning: Permanently added
> '10.0.10.30' (RSA) to the list of known hosts. receiving incremental
> file list ./
> .bash_history
>         1970 100%    1.88MB/s    0:00:00 (xfer#1, to-check=1005/1007)
> config/
> config/annotations.db
>          144 100%    0.23kB/s    0:00:00 (xfer#2, to-check=1356/1362)
> config/deliver.db
>            0   0%    0.00kB/s    0:00:00  ------------[ cut here
> ]------------
> 
> 
> This is what happened on the Debian 32 bit system with the 3.8.0-rc3
> UML kernel.
> 
> The DEB1 UML is now completely dead and locked up, no further
> messages escaped after this point.
> 
> If I try to kick it with uml_mconsole:
> 
> bash-4.1# uml_mconsole DEB1
> (DEB1) halt
> 
> and nothing more happens.
> 
> 10.0.10.30 is another 32 bit UML.
> 
> DEB1-32 is the Debian UML, with an IP address of 10.0.10.31.
> 
> Networking is via mcast.
> 
> This behaviour is consistent with what I have found all along.
> 
> I have seen the same on a 32 bit UML running on a genuinely 32 bit
> machine that is remote to my current location and which I access via
> the Internet, so the problem arises using real ethernet (via tun-tap)
> as well as mcast; and in a genuine 32 bit environment.
> 
> I will try to characterise this more fully, and simplify the method
> of causing failure as much as possible.

Thanks a lot for the detailed report.
Does UML consume 100% on the host side?

Thanks,
//richard

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