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Xen issues - Was Xen network performance problem during kickstart.



I've got three problems now seen in my testing.

1) Am seeing this at the start of a guest install.

    ------------[ cut here ]------------
kernel BUG at include/asm/xor.h:633!
invalid opcode: 0000 [#1]
SMP
Modules linked in: xor raid1 raid0 xennet sr_mod sd_mod scsi_mod cdrom
squashfs loop nfs nfs_acl lockd sunrpc vfat fat cramfs
CPU:    0
EIP:    0061:[<d10ba7be>]    Not tainted VLI
EFLAGS: 00010246   (2.6.15-1.1955_FC5guest)
EIP is at xor_sse_2+0x1de/0x1ec [xor]
eax: 00000000   ebx: 00000000   ecx: 00000000   edx: caf58000 next
screen
esi: caf55000   edi: 00000000   ebp: 00000000   esp: caf4fde0
ds: 007b   es: 007b   ss: 0069
Process loader (pid: 145, threadinfo=caf4e000 task=c04661f0)
Stack: <0>00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000
       00000000 00000000 00000000 00000000 00000000 00000000 00000000
00000000
       d10bc5ac 00000000 d10b9b13 00001000 caf54000 caf57000 caf57000
caf54000
Call Trace:
 [<d10b9b13>] do_xor_speed+0x42/0x90 [xor]



2) Ridiculously slow : 4 hours for a guest install of ~500mb. No
identifiable host problem.  I'm trying to do a network install and the
instance running right now is doing less than 1 byte/sec according to
"xm top".


3) Install crashes out at random points into install :


> > Hmm, I had two installs running and they were so slow I left the office
> > and on my return I find this :
> > 
> > This guy was only at 23% complete :  
> > 
> > Traceback (most recent call last):                               File
> > "/usr/bin/anaconda", line 1210, in ?
> > 
> > handleException(dispatch, intf, sys.exc_info())
> >                                          File
> > "/usr/lib/anaconda/exception.py", line 380, in handleException
> >   win.run()
> > 
> > File "/usr/lib/anaconda/text.py", line 154, in run
> >                     self.text, self.buttons)
> >                                               File
> > "/usr/lib/python2.4/site-packages/snack.py", line 765, in
> > ButtonChoiceWindow
> > 
> > t = TextboxReflowed(width, text, maxHeight = screen.height - 12)
> >                                         File
> > "/usr/lib/python2.4/site-packages/snack.py", line 218, in __init__
> > 
> > (newtext, width, height) = reflow(text, width, flexDown, flexUp)
> >                         File
> > "/usr/lib/python2.4/site-packages/snack.py", line 472, in reflow
> > 
> > return _snack.reflow(text, width, flexDown, flexUp)
> > 
> > TypeError: argument 1 must be string without null bytes, not str
> >                                                        install exited
> > abnormally
> > 
> > sending termination signals...done
> > 
> > sending kill signals...done
> > 
> > 
> > 
> > 
> > 
> > And this from the other which was 72% complete :
> > 
> > Traceback (most recent call last):
> >   File "/usr/bin/anaconda", line 1210, in ?
> >   handleException(dispatch, intf, sys.exc_info())
> >                                          File
> > "/usr/lib/anaconda/exception.py", line 380, in handleException
> >  win.run()
> > 
> > File "/usr/lib/anaconda/text.py", line 154, in run
> >                     self.text, self.buttons)
> >                                               File
> > "/usr/lib/python2.4/site-packages/snack.py", line 765, in
> > ButtonChoiceWindow
> > 
> > t = TextboxReflowed(width, text, maxHeight = screen.height - 12)
> >                                         File
> > "/usr/lib/python2.4/site-packages/snack.py", line 218, in __init__
> > 
> > (newtext, width, height) = reflow(text, width, flexDown, flexUp)
> >                         File
> > "/usr/lib/python2.4/site-packages/snack.py", line 472, in reflow
> > 
> > return _snack.reflow(text, width, flexDown, flexUp)
> > 
> > TypeError: argument 1 must be string without null bytes, not str
> >                                                        install exited
> > abnormally
> > 
> > sending termination signals...done
> > 
> > sending kill signals...done
> > 

If I can get a "me too" I'll file bugzilla's, otherwise I'll keep
testing.  Any helpful ideas as to where I can look would be appreciated.



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