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[Xen-devel] OSError: [Errno 10] No child processes

To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] OSError: [Errno 10] No child processes
From: "S.Çağlar Onur" <caglar@xxxxxxxxxxxxx>
Date: Sat, 2 Feb 2008 03:41:47 +0200
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After updating our Xen packages to current tip of xen-3.1-testing (from 3.1.0)

caglar@zangetsu xen-3.1-testing.hg $ hg tip
changeset:   15634:dbe47d8cb825
tag:         tip
user:        Keir Fraser <keir.fraser@xxxxxxxxxx>
date:        Thu Jan 31 10:07:57 2008 +0000
summary:     Added tag RELEASE-3.1.3 for changeset 

I cannot boot domU's anymore and i also cannot see what's the problem from logs

After a "xend start" trying to start ttylinux with following config

caglar@zangetsu ~ $ cat /etc/xen/ttylinux
kernel = "/boot/kernel-"
ramdisk = "/boot/initramfs-"
memory = 64
name = "ttylinux"
disk = ["file:/home/caglar/ttylinux,sda1,w"]
root = "/dev/sda1 ro"

ends up like following

zangetsu ~ # xm create -c /etc/xen/ttylinux
Using config file "/etc/xen/ttylinux".
Started domain ttylinux
Unexpected error: exceptions.OSError

Please report to xen-devel@xxxxxxxxxxxxxxxxxxx
Traceback (most recent call last):
  File "/usr/sbin/xm", line 10, in ?
  File "/usr/lib/python2.4/site-packages/xen/xm/main.py", line 2500, in main
    _, rc = _run_cmd(cmd, cmd_name, args)
  File "/usr/lib/python2.4/site-packages/xen/xm/main.py", line 2524, in _run_cmd
    return True, cmd(args)
  File "<string>", line 1, in <lambda>
  File "/usr/lib/python2.4/site-packages/xen/xm/main.py", line 1302, in 
    cmd.main([command] + args)
  File "/usr/lib/python2.4/site-packages/xen/xm/create.py", line 1298, in main
    do_console(sxp.child_value(config, 'name', -1))
  File "/usr/lib/python2.4/site-packages/xen/xm/create.py", line 1323, in 
    (p, rv) = os.waitpid(cpid, os.WNOHANG)
OSError: [Errno 10] No child processes

adding on_crash="preserve" to domU's config and trying to attach it also fails 
seems Domain crashed before booting.

Full logs can be found at http://cekirdek.pardus.org.tr/~caglar/xen/

Any help/advice/tip really appreciated.

S.Çağlar Onur <caglar@xxxxxxxxxxxxx>

Linux is like living in a teepee. No Windows, no Gates and an Apache in house!

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