Re: [Xen-users] apparently random lockups

["Eric S. Johansson" <esj@xxxxxxxxxx>]

Daniel Goertzen wrote:
>  
>
> > Bug 1: dual mounting an LVM partition creates excessively high load
> averages in a domU
> > instance.  By dual mounting I mean mounting the partition in dom0 as well
> as one domU instance.
>
>
> I note that you didn't say which filesystem you are using or wether they are
> mounted ro or rw.  For most filesystems, you can only multi-mount them if
> all the mounts are read-only.  If you want to mount read-write, then the
> partition can only be mounted once.  Some of the weird filesystem issues you
> mentioned in your first email might be explained by multiple rw mounts.
> Also, perhaps the rising load average is your filesystem driver trying to
> deal with the corrupted partition.
didn't really matter. reiserfs and ext3 both seem to fail the same way. 
 They were both mounted read/write and they only accelerated a failure 
apparently.
I just had my mail virtual machine with a growing load average lockup 
yet again.  I was logged in when this happened and discovered that you 
can't shut down such a machine.  You can only destroy it.  As for 
corrupted partitions, I've been checking them out with fsck and they are 
fine.
at this point, I'm going to scrap xen for the time being and go back to 
something stable like a 1995 architecture for virtual domains.  I really 
love the concept of xen and when it works it's wonderful but fo the past 
couple of weeks I've gone through hell try to keep a small-scale set of 
services running and it's just not worth it anymore.  I really need to 
be able to sleep at night and not wake up to toasted machines yet again.
I am going to keep playing with it from time to time as I wait for it to 
become mature enough to be what I consider trustworthy.  I guess that'll 
be about the time that virtual machine friendly chips show up in 
laptops. :-)
thanks for all the help and best of luck to the xen team.

--- eric


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