Re: disappointing upgrade to NetBSD 5.0

[Dan Engholm <mustang%engholm.org@localhost>]

Manuel Bouyer wrote:
> On Thu, May 28, 2009 at 01:47:59PM -0700, Dan Engholm wrote:
>   
> > Manuel Bouyer wrote:
> >     
> > > How was your filesystem formatted ? xen3 domU only support 32k MAXPHYS,
> > > so you can't use a ffs with 64k block size ..
> > >       
> > Manuel,
> >
> > That's probably it.  My ffs is formatted with bsize = 64KiB.  Is my only 
> > option to reformat to 32KiB or smaller blocks?
> >     
>
> Unfortunably yes. Actually this is related to a limitation of the xen3
> xbd interface which doesn't allows 64k requests. The workaround it to
> split 64k requests in 2 32k requests in the domU, and aggregate it again in
> a 64k request in dom0 but that's not implemented yet.
>
>   
It took a while but I managed to finally get my upgraded NetBSD 5.0/Xen 
3/X.org/X11R7 system back up and running.  It was painful but I haven't 
lost any data.  I still have a few issues to iron out but at least I 
have my main machine usable for most tasks again.  The 32k block size 
limit was the key.

Xen 2 seems to be much less than stable with NetBSD 5.0.  That's not too 
surprising given its age.  I would recommend to everybody still running 
Xen 2 to upgrade to Xen 3 before upgrading to NetBSD 5.0, just to take 
smaller steps.

Thanks for all the help and advice.

--Dan

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