Re: [Xen-devel] Xen 4.7 Headline Features (for PR)
> On 24 Apr 2016, at 02:06, Doug Goldsteinwrote: > > On 4/22/16 9:25 AM, George Dunlap wrote: >> On Fri, Apr 22, 2016 at 3:22 PM, Lars Kurth wrote: >>> On 22 Apr 2016, at 15:08, George Dunlap wrote: kconfig for the hypervisor >>> >>> This is one which potentially has a big security impact and could be a >>> Headline Feature. Just to remind me, is KCONFIG a run-time or build-time >>> config mechanism. If the latter, distro users will not benefit from it. >> >> Kconfig is build-time. Distros could use it in principle, and I think >> Gentoo will (that was part of Doug's motivation for doing it, IIUC). >> But yes, I suspect most distros will keep everything in by default. >> It's more a feature for embedded / security-conscious vendors. >> >> -George > > Not really important but I figured I'd be clear about my motivations. > For Gentoo I'll actually keep the stock settings. For Yocto I'll keep > the stock settings but expose a way to run kconfig (like the linux > kernel is in Yocto) for vendors with a security focus. I'm aware of a > handful of downstream vendors which will utilize that capability. Doug, this is good background information. Is the YOCTO work something ongoing, or is it something which we can refer to in the press coverage. I guess what you are saying is that YOCTO will (or already contains) a simple way to build a minimal Xen distribution. Lars ___ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
Re: [Xen-devel] Xen 4.7 Headline Features (for PR)
On 4/22/16 9:25 AM, George Dunlap wrote: > On Fri, Apr 22, 2016 at 3:22 PM, Lars Kurthwrote: >> >>> On 22 Apr 2016, at 15:08, George Dunlap wrote: >>> >>> On Fri, Apr 22, 2016 at 2:26 PM, Lars Kurth >>> wrote: Folks, given that we have we are getting close to RC's, I would like to start to spec out the headline Features for the press release. The big items I am aware of are COLO. I am a little confused about xSplice. Maybe we can use this thread to start collating a short-list. >>> >>> hotplug disk backends (drbd, iscsi, ) for HVM guests. >>> >>> hard affinity for credit2 >>> >>> soft reset for pv guests >>> >>> kconfig for the hypervisor >> >> This is one which potentially has a big security impact and could be a >> Headline Feature. Just to remind me, is KCONFIG a run-time or build-time >> config mechanism. If the latter, distro users will not benefit from it. > > Kconfig is build-time. Distros could use it in principle, and I think > Gentoo will (that was part of Doug's motivation for doing it, IIUC). > But yes, I suspect most distros will keep everything in by default. > It's more a feature for embedded / security-conscious vendors. > > -George Not really important but I figured I'd be clear about my motivations. For Gentoo I'll actually keep the stock settings. For Yocto I'll keep the stock settings but expose a way to run kconfig (like the linux kernel is in Yocto) for vendors with a security focus. I'm aware of a handful of downstream vendors which will utilize that capability. -- Doug Goldstein signature.asc Description: OpenPGP digital signature ___ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
Re: [Xen-devel] Xen 4.7 Headline Features (for PR)
Hi Lars, On 22/04/16 15:19, Lars Kurth wrote: On 22 Apr 2016, at 14:39, Wei Liuwrote: On Fri, Apr 22, 2016 at 02:26:39PM +0100, Lars Kurth wrote: Folks, given that we have we are getting close to RC's, I would like to start to spec out the headline Features for the press release. The big items I am aware of are COLO. I am a little confused about xSplice. Maybe we can use this thread to start collating a short-list. Typically we have 3-5 Headline Features in a press release. xSplice is definitively the first one on my list. I'm actually holding off cutting RC1 waiting for it to be merged. This would definitely be the #1 Headline feature then. It's the single most important thing we have done in a while and it has the potential to positive COLO is also a candidate, but there are many components that are not yet upstream. Those are not necessarily part of xen. Alright, we may need to be careful as to not raise wrong expectations, if there are missing pieces say in QEMU. On the other hand, having this in place before KVM is also nice. ACPI support on ARM is also a possible candidate. Note that this feature is considered as a tech preview and not enabled by default in Xen (you need to add XEN_CONFIG_EXPERT=y on the command line). Other headline features: * Wallclock support * Support of PSCI 1.0 for the host * Drop the support for HIP04 platform Agreed. Also easy to explain. Regards, -- Julien Grall ___ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
Re: [Xen-devel] Xen 4.7 Headline Features (for PR)
> On 22 Apr 2016, at 15:29, Andrew Cooperwrote: > > On 22/04/16 14:26, Lars Kurth wrote: >> Folks, >> >> given that we have we are getting close to RC's, I would like to start to >> spec out the headline Features for the press release. The big items I am >> aware of are COLO. I am a little confused about xSplice. >> >> Maybe we can use this thread to start collating a short-list. > > * CPUID levelling improvements for x86. I will let the thread run for a while, but it seems we have a few Headlines and groups of smaller features/improvements and features that build on Headline Features we had in the past that support certain market segments. Once I chatted with Zibby next week, we will work on a concrete proposal and share it. Lars ___ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
Re: [Xen-devel] Xen 4.7 Headline Features (for PR)
On 22/04/16 14:26, Lars Kurth wrote: > Folks, > > given that we have we are getting close to RC's, I would like to start to > spec out the headline Features for the press release. The big items I am > aware of are COLO. I am a little confused about xSplice. > > Maybe we can use this thread to start collating a short-list. * CPUID levelling improvements for x86. ~Andrew ___ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
Re: [Xen-devel] Xen 4.7 Headline Features (for PR)
On Fri, Apr 22, 2016 at 03:22:51PM +0100, Lars Kurth wrote: > > > On 22 Apr 2016, at 15:08, George Dunlapwrote: > > > > On Fri, Apr 22, 2016 at 2:26 PM, Lars Kurth > > wrote: > >> Folks, > >> > >> given that we have we are getting close to RC's, I would like to start to > >> spec out the headline Features for the press release. The big items I am > >> aware of are COLO. I am a little confused about xSplice. > >> > >> Maybe we can use this thread to start collating a short-list. > > > > hotplug disk backends (drbd, iscsi, ) for HVM guests. > > > > hard affinity for credit2 > > > > soft reset for pv guests > > > > kconfig for the hypervisor > > This is one which potentially has a big security impact and could be a > Headline Feature. Just to remind me, is KCONFIG a run-time or build-time > config mechanism. If the latter, distro users will not benefit from it. > Build time. It's more useful to people who would like to trim down Xen. It would be useful for embedded use cases I think. Distros will probably go with default configuration. Wei. > Lars > ___ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
Re: [Xen-devel] Xen 4.7 Headline Features (for PR)
On Fri, Apr 22, 2016 at 3:22 PM, Lars Kurthwrote: > >> On 22 Apr 2016, at 15:08, George Dunlap wrote: >> >> On Fri, Apr 22, 2016 at 2:26 PM, Lars Kurth wrote: >>> Folks, >>> >>> given that we have we are getting close to RC's, I would like to start to >>> spec out the headline Features for the press release. The big items I am >>> aware of are COLO. I am a little confused about xSplice. >>> >>> Maybe we can use this thread to start collating a short-list. >> >> hotplug disk backends (drbd, iscsi, ) for HVM guests. >> >> hard affinity for credit2 >> >> soft reset for pv guests >> >> kconfig for the hypervisor > > This is one which potentially has a big security impact and could be a > Headline Feature. Just to remind me, is KCONFIG a run-time or build-time > config mechanism. If the latter, distro users will not benefit from it. Kconfig is build-time. Distros could use it in principle, and I think Gentoo will (that was part of Doug's motivation for doing it, IIUC). But yes, I suspect most distros will keep everything in by default. It's more a feature for embedded / security-conscious vendors. -George ___ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
Re: [Xen-devel] Xen 4.7 Headline Features (for PR)
George Dunlapwrites: > > soft reset for pv guests > For HVM guests I guess. -- Vitaly ___ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
Re: [Xen-devel] Xen 4.7 Headline Features (for PR)
On Fri, Apr 22, 2016 at 3:19 PM, Lars Kurthwrote: > >> On 22 Apr 2016, at 14:39, Wei Liu wrote: >> >> On Fri, Apr 22, 2016 at 02:26:39PM +0100, Lars Kurth wrote: >>> Folks, >>> >>> given that we have we are getting close to RC's, I would like to start to >>> spec out the headline Features for the press release. The big items I am >>> aware of are COLO. I am a little confused about xSplice. >>> >>> Maybe we can use this thread to start collating a short-list. >>> > > Typically we have 3-5 Headline Features in a press release. > >> xSplice is definitively the first one on my list. I'm actually holding >> off cutting RC1 waiting for it to be merged. > > This would definitely be the #1 Headline feature then. It's the single most > important thing we have done in a while and it has the potential to positive > >> COLO is also a candidate, but there are many components that are not yet >> upstream. Those are not necessarily part of xen. > > Alright, we may need to be careful as to not raise wrong expectations, if > there are missing pieces say in QEMU. On the other hand, having this in place > before KVM is also nice. > >> ACPI support on ARM is also a possible candidate. > > Agreed. Also easy to explain. > >> There are also new PVUSB support in toolstack and some Intel features >> but I think they are less shiny. > > I am working with Intel product management to better understand the use-cases > for some of these and the user impact/benefit. That was something, we were > struggling with in the past (aka acronym overload and hard to understand the > big picture). Posted interrupts should allow a transparent improvement in performance for passed-through devices (when hardware support is available). -George ___ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
Re: [Xen-devel] Xen 4.7 Headline Features (for PR)
> On 22 Apr 2016, at 15:08, George Dunlapwrote: > > On Fri, Apr 22, 2016 at 2:26 PM, Lars Kurth wrote: >> Folks, >> >> given that we have we are getting close to RC's, I would like to start to >> spec out the headline Features for the press release. The big items I am >> aware of are COLO. I am a little confused about xSplice. >> >> Maybe we can use this thread to start collating a short-list. > > hotplug disk backends (drbd, iscsi, ) for HVM guests. > > hard affinity for credit2 > > soft reset for pv guests > > kconfig for the hypervisor This is one which potentially has a big security impact and could be a Headline Feature. Just to remind me, is KCONFIG a run-time or build-time config mechanism. If the latter, distro users will not benefit from it. Lars ___ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
Re: [Xen-devel] Xen 4.7 Headline Features (for PR)
> On 22 Apr 2016, at 14:39, Wei Liuwrote: > > On Fri, Apr 22, 2016 at 02:26:39PM +0100, Lars Kurth wrote: >> Folks, >> >> given that we have we are getting close to RC's, I would like to start to >> spec out the headline Features for the press release. The big items I am >> aware of are COLO. I am a little confused about xSplice. >> >> Maybe we can use this thread to start collating a short-list. >> Typically we have 3-5 Headline Features in a press release. > xSplice is definitively the first one on my list. I'm actually holding > off cutting RC1 waiting for it to be merged. This would definitely be the #1 Headline feature then. It's the single most important thing we have done in a while and it has the potential to positive > COLO is also a candidate, but there are many components that are not yet > upstream. Those are not necessarily part of xen. Alright, we may need to be careful as to not raise wrong expectations, if there are missing pieces say in QEMU. On the other hand, having this in place before KVM is also nice. > ACPI support on ARM is also a possible candidate. Agreed. Also easy to explain. > There are also new PVUSB support in toolstack and some Intel features > but I think they are less shiny. I am working with Intel product management to better understand the use-cases for some of these and the user impact/benefit. That was something, we were struggling with in the past (aka acronym overload and hard to understand the big picture). Best Regards Lars ___ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
Re: [Xen-devel] Xen 4.7 Headline Features (for PR)
On Fri, Apr 22, 2016 at 2:26 PM, Lars Kurthwrote: > Folks, > > given that we have we are getting close to RC's, I would like to start to > spec out the headline Features for the press release. The big items I am > aware of are COLO. I am a little confused about xSplice. > > Maybe we can use this thread to start collating a short-list. hotplug disk backends (drbd, iscsi, ) for HVM guests. hard affinity for credit2 soft reset for pv guests kconfig for the hypervisor ___ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
Re: [Xen-devel] Xen 4.7 Headline Features (for PR)
On Fri, Apr 22, 2016 at 02:39:43PM +0100, Wei Liu wrote: > On Fri, Apr 22, 2016 at 02:26:39PM +0100, Lars Kurth wrote: > > Folks, > > > > given that we have we are getting close to RC's, I would like to start to > > spec out the headline Features for the press release. The big items I am > > aware of are COLO. I am a little confused about xSplice. > > > > Maybe we can use this thread to start collating a short-list. > > > > xSplice is definitively the first one on my list. I'm actually holding > off cutting RC1 waiting for it to be merged. > I forgot to post this to this list. For the record, some hypervisor committers (Jan, Andrew and Konrad), Ross, I and some other community members had a meeting during hackathon. The conclusion is that xSplice is important enough to have a freeze exception. Wei. ___ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
Re: [Xen-devel] Xen 4.7 Headline Features (for PR)
On 22/04/16 15:26, Lars Kurth wrote: > Folks, > > given that we have we are getting close to RC's, I would like to start to > spec out the headline Features for the press release. The big items I am > aware of are COLO. I am a little confused about xSplice. > > Maybe we can use this thread to start collating a short-list. I've worked on: - huge pv-domains (>512GB) - pvUSB (backend in qemu still pending) - xenstore domain enhancements Juergen ___ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
Re: [Xen-devel] Xen 4.7 Headline Features (for PR)
On Fri, Apr 22, 2016 at 02:26:39PM +0100, Lars Kurth wrote: > Folks, > > given that we have we are getting close to RC's, I would like to start to > spec out the headline Features for the press release. The big items I am > aware of are COLO. I am a little confused about xSplice. > > Maybe we can use this thread to start collating a short-list. > xSplice is definitively the first one on my list. I'm actually holding off cutting RC1 waiting for it to be merged. COLO is also a candidate, but there are many components that are not yet upstream. Those are not necessarily part of xen. ACPI support on ARM is also a possible candidate. There are also new PVUSB support in toolstack and some Intel features but I think they are less shiny. Wei. > Best Regards > Lars > ___ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
[Xen-devel] Xen 4.7 Headline Features (for PR)
Folks, given that we have we are getting close to RC's, I would like to start to spec out the headline Features for the press release. The big items I am aware of are COLO. I am a little confused about xSplice. Maybe we can use this thread to start collating a short-list. Best Regards Lars ___ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel