Summary of Xen/pv_ops changes/additions in upcoming Linux 2.6.28?

Summary of Xen/pv_ops changes/additions in upcoming Linux 2.6.28?

[Pasi Kärkkäinen]

Hello list!

http://wiki.xensource.com/xenwiki/XenParavirtOps

I changed that wiki pv_ops page to have the list of features added in Linux 2.6.27.

I could also add to the wiki pv_ops page the stuff that's queued for Linux 2.6.28.

Does someone have a list/summary about that? 

-- Pasi

Re: Summary of Xen/pv_ops changes/additions in upcoming Linux 2.6.28?

[Ferenc Wagner]

Pasi Kärkkäinen <pasik@iki.fi> writes:

> http://wiki.xensource.com/xenwiki/XenParavirtOps

It says:

Xen/paravirt_ops has been in mainline Linux since 2.6.23, though it is
probably first usable in 2.6.24. While I wouldn't put it in production
just yet, for normal desktop/developer workloads it has proven to be
pretty stable.

Is this statement still well founded?
-- 
Cheers,
Feri.

Re: Re: Summary of Xen/pv_ops changes/additions in upcoming Linux 2.6.28?

[Pasi Kärkkäinen]

On Wed, Nov 26, 2008 at 11:11:07AM +0100, Ferenc Wagner wrote:
> Pasi Kärkkäinen <pasik@iki.fi> writes:
> 
> > http://wiki.xensource.com/xenwiki/XenParavirtOps
> 
> It says:
> 
> Xen/paravirt_ops has been in mainline Linux since 2.6.23, though it is
> probably first usable in 2.6.24. While I wouldn't put it in production
> just yet, for normal desktop/developer workloads it has proven to be
> pretty stable.
> 
> Is this statement still well founded?

Yeah, I guess that should be modified.. suggestions? 

pv_ops based domU kernels are shipping at least in Fedora 9 and Fedora 10.. 
how about other distributions? 

-- Pasi

Re: Re: Summary of Xen/pv_ops changes/additions in upcoming Linux 2.6.28?

[Keir Fraser]

On 26/11/08 11:50, "Pasi Kärkkäinen" <pasik@iki.fi> wrote:

>> Xen/paravirt_ops has been in mainline Linux since 2.6.23, though it is
>> probably first usable in 2.6.24. While I wouldn't put it in production
>> just yet, for normal desktop/developer workloads it has proven to be
>> pretty stable.
>> 
>> Is this statement still well founded?
> 
> Yeah, I guess that should be modified.. suggestions?
> 
> pv_ops based domU kernels are shipping at least in Fedora 9 and Fedora 10..
> how about other distributions?

pv_ops is find for domU use now. x86/64 has had less testing than i386
though, of course, since the support is newer.

 -- Keir

Re: Re: Summary of Xen/pv_ops changes/additions in upcoming Linux 2.6.28?

[Pasi Kärkkäinen]

On Wed, Nov 26, 2008 at 11:58:27AM +0000, Keir Fraser wrote:
> On 26/11/08 11:50, "Pasi Kärkkäinen" <pasik@iki.fi> wrote:
> 
> >> Xen/paravirt_ops has been in mainline Linux since 2.6.23, though it is
> >> probably first usable in 2.6.24. While I wouldn't put it in production
> >> just yet, for normal desktop/developer workloads it has proven to be
> >> pretty stable.
> >> 
> >> Is this statement still well founded?
> > 
> > Yeah, I guess that should be modified.. suggestions?
> > 
> > pv_ops based domU kernels are shipping at least in Fedora 9 and Fedora 10..
> > how about other distributions?
> 
> pv_ops is find for domU use now. x86/64 has had less testing than i386
> though, of course, since the support is newer.
> 

I just edited that page again.. does it look better/ok now? 

-- Pasi

Re: Summary of Xen/pv_ops changes/additions in upcoming Linux 2.6.28?

[Ferenc Wagner]

Pasi Kärkkäinen <pasik@iki.fi> writes:

> On Wed, Nov 26, 2008 at 11:11:07AM +0100, Ferenc Wagner wrote:
>> Pasi Kärkkäinen <pasik@iki.fi> writes:
>> 
>>> http://wiki.xensource.com/xenwiki/XenParavirtOps
>> 
>> It says:
>> 
>> Xen/paravirt_ops has been in mainline Linux since 2.6.23, though it is
>> probably first usable in 2.6.24. While I wouldn't put it in production
>> just yet, for normal desktop/developer workloads it has proven to be
>> pretty stable.
>> 
>> Is this statement still well founded?
>
> Yeah, I guess that should be modified.. suggestions? 
>
> pv_ops based domU kernels are shipping at least in Fedora 9 and Fedora 10.. 
> how about other distributions? 

Debian Lenny will ship 2.6.26 kernel with save/restore/migration
patches backported from 2.6.27.  That also works OK.  I use the
686-bigmem flavour only, but others successully run the 64 bit version
AFAIK.
-- 
Feri.

Re: Re: Summary of Xen/pv_ops changes/additions in upcoming Linux 2.6.28?

[Keir Fraser]

On 26/11/08 12:34, "Pasi Kärkkäinen" <pasik@iki.fi> wrote:

>>> pv_ops based domU kernels are shipping at least in Fedora 9 and Fedora 10..
>>> how about other distributions?
>> 
>> pv_ops is find for domU use now. x86/64 has had less testing than i386
>> though, of course, since the support is newer.
>> 
> 
> I just edited that page again.. does it look better/ok now?

Yeah, that looks better, thanks!

 -- Keir

Re: Re: Summary of Xen/pv_ops changes/additions in upcoming Linux 2.6.28?

[Ian Campbell]

On Wed, 2008-11-26 at 13:51 +0100, Ferenc Wagner wrote:
> Pasi Kärkkäinen <pasik@iki.fi> writes:
> 
> > On Wed, Nov 26, 2008 at 11:11:07AM +0100, Ferenc Wagner wrote:
> >> Pasi Kärkkäinen <pasik@iki.fi> writes:
> >> 
> >>> http://wiki.xensource.com/xenwiki/XenParavirtOps
> >> 
> >> It says:
> >> 
> >> Xen/paravirt_ops has been in mainline Linux since 2.6.23, though it is
> >> probably first usable in 2.6.24. While I wouldn't put it in production
> >> just yet, for normal desktop/developer workloads it has proven to be
> >> pretty stable.
> >> 
> >> Is this statement still well founded?
> >
> > Yeah, I guess that should be modified.. suggestions? 
> >
> > pv_ops based domU kernels are shipping at least in Fedora 9 and Fedora 10.. 
> > how about other distributions? 
> 
> Debian Lenny will ship 2.6.26 kernel with save/restore/migration
> patches backported from 2.6.27.  That also works OK.  I use the
> 686-bigmem flavour only, but others successully run the 64 bit version
> AFAIK.

Unfortunately There's no 64 bit version of the domU pvops kernel in
Lenny. 64 bit domU first appeared in 2.6.27, I think, and the backport
was too involved for me to consider.

What Lenny will have is a kernel with the SUSE forward ported non-pvops
patch for 32+64 dom0 and 64 domU support (the -{686,amd64}-xen
packages), in addition to the -686-bigmem pvops kernel for 32 bit domU.

Ian.

Re: Re: Summary of Xen/pv_ops changes/additions in upcoming Linux 2.6.28?

[Pasi Kärkkäinen]

On Wed, Nov 26, 2008 at 12:59:49PM +0000, Ian Campbell wrote:
> On Wed, 2008-11-26 at 13:51 +0100, Ferenc Wagner wrote:
> > Pasi Kärkkäinen <pasik@iki.fi> writes:
> > 
> > > On Wed, Nov 26, 2008 at 11:11:07AM +0100, Ferenc Wagner wrote:
> > >> Pasi Kärkkäinen <pasik@iki.fi> writes:
> > >> 
> > >>> http://wiki.xensource.com/xenwiki/XenParavirtOps
> > >> 
> > >> It says:
> > >> 
> > >> Xen/paravirt_ops has been in mainline Linux since 2.6.23, though it is
> > >> probably first usable in 2.6.24. While I wouldn't put it in production
> > >> just yet, for normal desktop/developer workloads it has proven to be
> > >> pretty stable.
> > >> 
> > >> Is this statement still well founded?
> > >
> > > Yeah, I guess that should be modified.. suggestions? 
> > >
> > > pv_ops based domU kernels are shipping at least in Fedora 9 and Fedora 10.. 
> > > how about other distributions? 
> > 
> > Debian Lenny will ship 2.6.26 kernel with save/restore/migration
> > patches backported from 2.6.27.  That also works OK.  I use the
> > 686-bigmem flavour only, but others successully run the 64 bit version
> > AFAIK.
> 
> Unfortunately There's no 64 bit version of the domU pvops kernel in
> Lenny. 64 bit domU first appeared in 2.6.27, I think, and the backport
> was too involved for me to consider.
> 
> What Lenny will have is a kernel with the SUSE forward ported non-pvops
> patch for 32+64 dom0 and 64 domU support (the -{686,amd64}-xen
> packages), in addition to the -686-bigmem pvops kernel for 32 bit domU.
> 

Uhm.. did I get it correctly?:

-686-bigmem (PAE) is the pv_ops 32 bit domU kernel.
-686-xen is the non-pv_ops (Suse patched) dom0/domU kernel
-amd64-xen is the non-pv_ops (Suse patched) dom0/domU kernel

-- Pasi

Re: Re: Summary of Xen/pv_ops changes/additions in upcoming Linux 2.6.28?

[Ian Campbell]

On Wed, 2008-11-26 at 19:41 +0200, Pasi Kärkkäinen wrote:
> Uhm.. did I get it correctly?:
> 
> -686-bigmem (PAE) is the pv_ops 32 bit domU kernel.
> -686-xen is the non-pv_ops (Suse patched) dom0/domU kernel
> -amd64-xen is the non-pv_ops (Suse patched) dom0/domU kernel

Close, the last two are named the other way round, It's:

-686-bigmem (PAE) is the pv_ops 32 bit domU kernel.
-xen-686 is the non-pv_ops (Suse patched) dom0/domU kernel
-xen-amd64 is the non-pv_ops (Suse patched) dom0/domU kernel

Ian.