xen November 2011

xen@lists.fedoraproject.org

11 participants
12 discussions

execute commands from dom0 into domU
by silviu d 06 Jun '15

06 Jun '15

Hello, I was wondering if there is a way to execute commands from dom0 into domU without loging into domU with ssh. thanks

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xen build for testing
by M A Young 21 Nov '11

21 Nov '11

I have done a temporary test build xen-4.1.2-1.1 at http://koji.fedoraproject.org/koji/taskinfo?taskID=3495905 which contains patches from http://lists.xensource.com/archives/html/xen-devel/2011-11/msg00218.html http://lists.xensource.com/archives/html/xen-devel/2011-11/msg00321.html which I would like to test before putting them into a released version. If anyone else wants to test it, please let me know whether it works. Michael Young

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Booting Xen on an EFI system
by Mark Bradley 17 Nov '11

17 Nov '11

Hello. I installed FC16 on a system that has an Asus P8B WS board and a Xeon E3 CPU. This system boots via (U)EFI. Everything works well but I want to use Xen so I installed the binaries using yum. It put down files but did not setup anything in GRUB. Following some advice, I added the information but it does not boot via /boot/xen.gz because, I assume, it's not an EFI binary. The installation did not include an EFI-compatible binary. Pulling down the Xen source and compiling it gave me an EFI executable. Unfortunately, I don't know how to use this with GRUB. I tried using efibootmgr which created another EFI boot entry but it doesn't have any of the configuration details that you'd normally see in a grub.conf file. http://wiki.xensource.com/xenwiki/XenParavirtOps has info about Xen/EFI but I don't have (I think) an EFI shell so I cannot test it as described. Any thoughts? :-) Thanks and cheers, Mark

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Re: [Fedora-xen] [Xen-devel] [PATCH] Xen 4.1.2 HVM guest realtek nic problems (eth0 8139cp transmit queue timed out)
by Pasi Kärkkäinen 16 Nov '11

16 Nov '11

On Wed, Nov 16, 2011 at 04:34:56PM +0000, Keir Fraser wrote: > On 16/11/2011 15:53, "Pasi Kärkkäinen" <pasik(a)iki.fi> wrote: > > > On Wed, Nov 16, 2011 at 03:00:25PM +0000, Keir Fraser wrote: > >> On 16/11/2011 13:33, "Pasi Kärkkäinen" <pasik(a)iki.fi> wrote: > >> > >>> On Mon, Nov 14, 2011 at 05:47:11PM +0000, Ian Jackson wrote: > >>>> Pasi Kärkkäinen writes ("Re: [Xen-devel] [PATCH] Xen 4.1.2 HVM guest > >>>> realtek > >>>> nic problems (eth0 8139cp transmit queue timed out)"): > >>>>> So please go ahead and commit the fix to xen-4.1-testing.hg. > >>>> > >>>> Keir, will you do this ? If you prefer I can do it, but I need the > >>>> blessing of a hypervisor maintainer. > >>>> > >>> > >>> Ping? > >> > >> I responded on 3rd November: > >> > >> "This looks like a backport of Stefano's xen-unstable c/s 24007. I would > >> like him to submit/ack the backport, as it is not a trivial backport of the > >> xen-unstable patch." > >> > > > > Stefano already submitted a new patch for this.. > > So he did. I've now applied it to xen-4.1-testing. > Great, thanks! -- Pasi

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Re: [Fedora-xen] [Xen-devel] [PATCH] Xen 4.1.2 HVM guest realtek nic problems (eth0 8139cp transmit queue timed out)
by Pasi Kärkkäinen 16 Nov '11

16 Nov '11

On Wed, Nov 16, 2011 at 03:00:25PM +0000, Keir Fraser wrote: > On 16/11/2011 13:33, "Pasi Kärkkäinen" <pasik(a)iki.fi> wrote: > > > On Mon, Nov 14, 2011 at 05:47:11PM +0000, Ian Jackson wrote: > >> Pasi Kärkkäinen writes ("Re: [Xen-devel] [PATCH] Xen 4.1.2 HVM guest realtek > >> nic problems (eth0 8139cp transmit queue timed out)"): > >>> So please go ahead and commit the fix to xen-4.1-testing.hg. > >> > >> Keir, will you do this ? If you prefer I can do it, but I need the > >> blessing of a hypervisor maintainer. > >> > > > > Ping? > > I responded on 3rd November: > > "This looks like a backport of Stefano's xen-unstable c/s 24007. I would > like him to submit/ack the backport, as it is not a trivial backport of the > xen-unstable patch." > Stefano already submitted a new patch for this.. -- Pasi

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Re: [Fedora-xen] [Xen-devel] [PATCH] Xen 4.1.2 HVM guest realtek nic problems (eth0 8139cp transmit queue timed out)
by Ian Jackson 16 Nov '11

16 Nov '11

Pasi Kärkkäinen writes ("Re: [Xen-devel] [PATCH] Xen 4.1.2 HVM guest realtek nic problems (eth0 8139cp transmit queue timed out)"): > So please go ahead and commit the fix to xen-4.1-testing.hg. Keir, will you do this ? If you prefer I can do it, but I need the blessing of a hypervisor maintainer. Ian.

2 1

xend: No IP forwarding on Fedora 16
by W. Michael Petullo 15 Nov '11

15 Nov '11

I am having a strange problem on Fedora 16. I am trying to figure out what is going on, but have not yet been successful. I am using Xen with routed interfaces instead of bridged (i.e., vif-script vif-route). In this case, the "network-route" script should enable kernel port forwarding. However, this is not the case---at least the first time xend runs. Xend runs, but /proc/sys/net/ipv4/ip_forward still contains "0". But, if I restart xend by hand using "service xend restart", then kernel IP forwarding gets turned on. At first I thought this may be due to SELinux (perhaps systemd starts xend in a different context than a root shell does). But this is not the case; I get the same behavior when I boot with SELinux in permissive mode. Does anyone else know what might be causing this? -- Mike :wq

2 1

Re: [Fedora-xen] [Xen-devel] [PATCH] Xen 4.1.2 HVM guest realtek nic problems (eth0 8139cp transmit queue timed out)
by Stefano Stabellini 14 Nov '11

14 Nov '11

On Thu, 3 Nov 2011, Keir Fraser wrote: > On 03/11/2011 18:07, "Pasi KÃ¤rkkÃ¤inen" <pasik(a)iki.fi> wrote: > > > On Tue, Nov 01, 2011 at 10:56:06PM +0200, Pasi KÃ¤rkkÃ¤inen wrote: > >> On Mon, Oct 31, 2011 at 09:29:24PM +0200, Pasi KÃ¤rkkÃ¤inen wrote: > >>> On Mon, Oct 31, 2011 at 12:24:14PM -0700, Boris Derzhavets wrote: > >>>> Seems to related > >>>> > >>>> https://bugs.launchpad.net/ubuntu/+source/xen/+bug/854829 > >>>> > >>> > >>> Thanks, that seems to be the same bug. > >>> > >>> Is the bugfix patch from xen-unstable going to backported to > >>> xen-4.1-testing.hg ? > >>> (4.1 backported patch available on ubuntu's launchpad above..) > >>> > >> > >> So the Ubuntu backport from xen-unstable to Xen 4.1.1 is here: > >> https://launchpadlibrarian.net/81948978/xen-pirq-resubmit-irq.patch > >> > >> It seems to be shipping in Ubuntu 11.10 xen 4.1.1-2ubuntu4.1 packages. > >> > >> Does that patch look suitable to be applied to xen-4.1-testing.hg ? > >> This bug should be fixed for Xen 4.1.3. > > > > Any comments? > > This looks like a backport of Stefano's xen-unstable c/s 24007. I would like > him to submit/ack the backport, as it is not a trivial backport of the > xen-unstable patch. I would rather use the following backport. Compared to the other one it returns EINVAL in PHYSDEVOP_irq_status_query when the arguments are not correct. --- diff -r 8c2d76193eaf xen/arch/x86/physdev.c --- a/xen/arch/x86/physdev.c Wed Nov 02 15:02:18 2011 +0000 +++ b/xen/arch/x86/physdev.c Mon Nov 07 11:58:28 2011 +0000 @@ -261,6 +261,7 @@ ret_t do_physdev_op(int cmd, XEN_GUEST_H ret = -EINVAL; if ( eoi.irq >= v->domain->nr_pirqs ) break; + spin_lock(&v->domain->event_lock); if ( v->domain->arch.pirq_eoi_map ) evtchn_unmask(v->domain->pirq_to_evtchn[eoi.irq]); if ( !is_hvm_domain(v->domain) || @@ -268,6 +269,19 @@ ret_t do_physdev_op(int cmd, XEN_GUEST_H ret = pirq_guest_eoi(v->domain, eoi.irq); else ret = 0; + if ( is_hvm_domain(v->domain) && + domain_pirq_to_emuirq(v->domain, eoi.irq) > 0 ) + { + struct hvm_irq *hvm_irq = &v->domain->arch.hvm_domain.irq; + int gsi = domain_pirq_to_emuirq(v->domain, eoi.irq); + + /* if this is a level irq and count > 0, send another + * notification */ + if ( gsi >= NR_ISAIRQS /* ISA irqs are edge triggered */ + && hvm_irq->gsi_assert_count[gsi] ) + send_guest_pirq(v->domain, eoi.irq); + } + spin_unlock(&v->domain->event_lock); break; } @@ -323,9 +337,10 @@ ret_t do_physdev_op(int cmd, XEN_GUEST_H break; irq_status_query.flags = 0; if ( is_hvm_domain(v->domain) && - domain_pirq_to_irq(v->domain, irq) <= 0 ) + domain_pirq_to_irq(v->domain, irq) <= 0 && + domain_pirq_to_emuirq(v->domain, irq) == IRQ_UNBOUND ) { - ret = copy_to_guest(arg, &irq_status_query, 1) ? -EFAULT : 0; + ret = -EINVAL; break; }

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Can I Run Windows 7 Under Xen With Fedora 16?
by Bob Cochran 10 Nov '11

10 Nov '11

I want to use Fedora 16 as a host OS (a "Dom0" OS) so that I can install several different operating systems as virtualized guests. One of these will be Windows 7. Are there enough Xen and Fedora bits in place for Fedora 16 virtualization so that my friend can access Windows 7 as a virtual machine and not know the difference -- she can access the USB ports, printer and fax devices, run PhotoShop and and various other photo editing applications? I have no recent experience with Fedora virtualization, but I expect to be able to work with it quite soon. I have installed virtual machines with older Fedora releases but can't remember exactly what I did. I apologize if the question is simplistic. Thanks Bob Cochran

3 2

Current dom0 kernel for F15/16
by Robert Brown 07 Nov '11

07 Nov '11

Hi everyone, thanks for the list - quite helpful in running Fedora with Xen. I have been using the myoung kernels for dom0, specifically kernel-2.6.32.39-175.xendom0.fc13.x86_64 at the moment. I was previously on Fedora 12 and rolled a successful upgrade to Fedora 14. I am using xen 4.1.1 (created from later SRPMs provided with newer Fedora releases.) It's all working as it should. To move beyond Fedora 14 and update to 15/16, I need a more recent kernel as F15 won't install otherwise. I have read through the list and can't seem to locate a Fedora 15-supported prerolled kernel or SRPM. Does this exist, and if so can someone kindly point me to the proper location? Or is the current preferred approach to compile your own kernel? If this is the suggested approach, are there any special requirements for this or kernel options to be enabled/disabled? I found an older dom0 tutorial but it seems geared to building the myoung kernel. http://wiki.xen.org/xenwiki/Fedora13Xen4Tutorial Thanks in advance, -Robert

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xen November 2011