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Re: [Xen-users] propagating blktap partition changes

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] propagating blktap partition changes
From: Maarten Vanraes <maarten@xxxxx>
Date: Thu, 5 Feb 2009 13:59:57 +0100
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Op Thursday 05 February 2009 13:05:01 schreef Pasi Kärkkäinen:
> On Thu, Feb 05, 2009 at 11:52:56AM +0100, Maarten Vanraes wrote:
> > Hi,
> >
> > I have 2 questions:
> >
> >  1. I was not able to let the guest know that the partition size was
> > changed. 2. I was not able to use block-attach with the same backendfile
> > to different machines (eg: guest + dom0)
> >
> > I've read that block-reconfigure could've been used for this, except that
> > it wasn't designed to work for filebased vbd on PVs, only for switching
> > CDROMs in HVM
> >
> > When you use a local disk on a machine, you can use fdisk to change
> > partitions and sizes, it then rereads the partition table to reflect
> > those changes.
> >
> > Since i'm not using a disk, but directly partitions, isn't it possible to
> > just give a signal to the guest that it should recheck the partition? can
> > be from the guest itself.
> >
> > Some kind of workaround?
> Sorry, this is not possible.
> There's a a feature request about it for Xen 3.4.
> Dunno if it will be implemented.
> -- Pasi

Yes, i read your thread, i was hoping for some kind of workaround, some kind 
of "thing" i can execute on the guest, that would make the kernel recheck 
it's partition size or something.


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