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xen-devel
Re: [Xen-devel] What is the state of blktap2?
On Fri, 2010-01-22 at 00:59 +0200, Pasi Kärkkäinen wrote:
> On Fri, Jan 22, 2010 at 12:55:52AM +0200, Pasi Kärkkäinen wrote:
> > On Thu, Jan 21, 2010 at 05:46:05PM -0500, David P. Quigley wrote:
> > > On Fri, 2010-01-22 at 00:38 +0200, Pasi Kärkkäinen wrote:
> > > > On Thu, Jan 21, 2010 at 05:27:45PM -0500, David P. Quigley wrote:
> > > > > I'm currently working on moving storage services into their own domain
> > > > > and I've been looking at blktap2. I've been trying to get an image
> > > > > mounted with blktap2 and for some odd reason and tapdisk2 keeps
> > > > > hanging
> > > > > instead of quitting at the end. I haven't removed any of the storage
> > > > > startup code at this point so everything should be as it normally is
> > > > > in
> > > > > xen-unstable. Is this a known bug? Are there some requirements on
> > > > > blktap2 that I'm possibly not meeting? Is there anything in particular
> > > > > that I should be looking at to try to debug the problem?
> > > > >
> > > >
> > > > What kernel are you using? pv_ops dom0 kernel doesn't have working
> > > > blktap2 yet..
> > > > linux-2.6.18-xen has working blktap2 support.
> > > >
> > > > -- Pasi
> > >
> > > I'm using the patches maintained by Andrew Lyon that are applied to
> > > 2.6.31.10. These are supposedly based on the OpenSUSE patches and can be
> > > found at http://code.google.com/p/gentoo-xen-kernel/downloads/list. I
> > > need a more recent kernel version so the 2.6.18 dom0 kernel isn't an
> > > option for me.
> > >
> >
> > Ok. I'm not sure if those OpenSUSE patches have blktap2 support included?
> > I know that at least Citrix XenServer, XCP and XCI 2.6.27 kernels do have
> > blktap2.
> >
> > See:
> > http://wiki.xensource.com/xenwiki/XenDom0Kernels
> >
>
> More details about the pv_ops dom0 kernel (2.6.31.6 currently): It has
> initial version
> of blktap2 patches, but they'd need some debugging, because they're not yet
> working.
>
> -- Pasi
I haven't had much success with pv_ops as a dom0 kernel in the past but
it would be more beneficial to try fixing blktap2 in the context of that
kernel then the Novell patches that I'm currently using. I'll try to
build the pv_ops kernel as a dom0 and if I can run it as a dom0
successfully I'll see what I can try to do to get blktap2 working on it.
Dave
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