Re: Re: almost working

[Jody Belka <lists-xen@pimb.org>]

On Wed, Jul 07, 2004 at 08:10:10AM +0100, Keir Fraser wrote:
> > > Seeing this msg i cloned down the latest (at the time) rev from bk. After
> > > rebuilding xen, my dom0 and domU kernels, and all the tools, I tried it
> > > out. Unfortunately i couldn't even start an unpriveleged domain any more.
> > > Logs of xend tracing and the relevant command window are attached; hope
> > > they're helpful in tracking down the problem.
> 
> Somehow related to specifying more than one VBD when creating a new
> guest. If you specify just one then it works. Hopefully not hard to
> track down.

After spending 2 solid hours slogging away at this in the early hours
of this morning (or late late last night if you prefer), i tracked it
down. To my eyes it looks like it had the potential to muck about with
more than just VBD's, and that's just what was triggering it in this case.

Here's a patch for it:

--- tools/python/xen/xend/server/controller.py  Fri Jul  9 08:06:52 2004
+++ tools/python/xen/xend/server/controller.py.new      Fri Jul  9 08:06:24 2004
@@ -178,7 +178,7 @@
             resp = self.responders[0]
             if resp.mid > mid:
                 break
-            self.responders.pop()
+            self.responders.pop(0)
             if resp.mid < mid:
                 print 'callResponders> Out of order:', resp.mid, mid
                 resp.error(OutOfOrderError())


On a seperate matter, i always have to apply this patch to a new clone of
xen-unstable or stuff doesn't work. Am i the only one having this trouble,
and if so, any ideas why?

--- tools/python/xen/xend/XendDomainInfo.py     Fri Jul  9 08:10:38 2004
+++ tools/python/xen/xend/XendDomainInfo.py.new Fri Jul  9 08:10:18 2004
@@ -49,6 +49,20 @@
         lines.append(line)
     return lines
 
+def readline(fd):
+    """Version of readline safe against EINTR.
+    """
+    import errno
+    
+    while 1:
+        try:
+            return fd.readline()
+        except IOError, ex:
+            if ex.errno == errno.EINTR:
+                continue
+            else:
+                raise
+
 class VmError(ValueError):
     """Vm construction error."""
 

-- 
Jody Belka
knew (at) pimb (dot) org


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