Re: [Xen-users] SLES10SP2 (xen 3.2.x) vs SLES11 (xen 3.4.x)

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Tue, Dec 01, 2009 at 03:36:30PM -0500, James Pifer wrote:
> On Tue, 2009-12-01 at 19:08 +0200, Pasi Kärkkäinen wrote:
> > On Tue, Dec 01, 2009 at 08:35:34AM -0500, James Pifer wrote:
> > > I built a couple new servers on SLES11 because I needed to use USB.
> > > Since SLES11 has xen 3.4 packages that seemed like the way to go. I'm
> > > questioning the stability of the two new servers compared to my
> > > SLES10SP2 servers. I'm also questioning the performance of Windows
> > > domUs. 
> > > 
> > > On Thanksgiving day one of my SLES11 servers running 7-8 domUs crashed
> > > and restarted three times. Being Thanksgiving day I did not spend a lot
> > > of time on it and the quickest fix at the time was moving the domUs to
> > > another server, which I did.
> > >
> > 
> > You should setup (and have) a serial console logging what's happening..
> > then you could just check the serial console log for
> > errors/tracebacks/crash information.
> > 
> > That's the best way to track it down and get if fixed.
> > 
> > > I've been running a memory test on that server since yesterday. So far
> > > no errors. 
> > > 
> > > Since bringing up Windows domUs on SLES11 I've noticed they seem
> > > slightly sluggish compared to the same domU on SLES10SP2. Is there a
> > > test I can do to compare the performance?
> > > 
> > > Anyone else running SLES11 that has noticed any of these types of
> > > issues?
> > > 
> > 
> > Are you using GPLPV drivers in the Windows guest? Or Novell's Windows PV
> > drivers?
> > 
> > -- Pasi
> 
> Thanks for the response. I had to change one of these servers back to
> sles10sp2 as we were trying to use one of the domUs and it kept
> crashing. The end of the log for the domU gives:
> 
> platform_fixed_ioport: changed ro/rw state of ROM memory area. now is rw 
> state.
> platform_fixed_ioport: changed ro/rw state of ROM memory area. now is ro 
> state.
> xc_map_foreign_batch: mmap failed: Cannot allocate memory
> xc_map_foreign_batch error 12
> 

Do you see these in domU or in dom0 ?

> Not sure what this means. The host server has 32 gb of RAM and there
> were only half a dozen domUs running, with only about 5gb of ram
> assigned. 
> 
> It's now running on sles10sp2 dom0 without a problem. I guess it will be
> a while before we go with sles11. 
> 

Did you dedicate fixed amount of memory for dom0? For example 512 MB or
1 GB using dom0_mem= parameter for Xen in grub.conf ?

-- Pasi


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