[ANNOUNCE] Live Update BoF at LPC 2026

[ANNOUNCE] Live Update BoF at LPC 2026

[Pratyush Yadav]

Hi all,

The proposal for a Live Update BoF has been accepted. The BoF is
scheduled on Monday October 5th at 12:00. Event link:
https://lpc.events/event/20/contributions/2641/

The primary topic of discussion will be LUO/KHO ABI and what type of
backwards and forwards compatibility should be guaranteed for the ABI.
There are different opinions from various parts of the community and
this would be a chance to bring out all views and come to an agreement.
More context can be found at these mailing list threads: [0][1].

Other list of potential topics, time permitting:

- TMPFS preservation [2][3].
- Getting rid of scratch/bootmem areas.
- KHO enablement on different architectures like Loongarch or PowerPC.
- Making KHO work with crash reservations and KASAN.

This list is open to suggestions.

Hope to see you there!

[0] https://lore.kernel.org/kexec/2vxzik5f311e.fsf@kernel.org/#r
[1] https://lore.kernel.org/kexec/20260904160009.GV4157646@nvidia.com/#r
[2] https://lore.kernel.org/kexec/20260923224408.3745689-1-pratyush@kernel.org/T/#u
[3] https://lore.kernel.org/kexec/20260901180713.4185641-1-dmatlack@google.com/T/#u

-- 
Regards,
Pratyush Yadav

Re: [ANNOUNCE] Live Update BoF at LPC 2026

[David Woodhouse]

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On Thu, 2026-10-01 at 21:47 +0200, Pratyush Yadav wrote:
> Hi all,
> 
> The proposal for a Live Update BoF has been accepted. The BoF is
> scheduled on Monday October 5th at 12:00. Event link:
> https://lpc.events/event/20/contributions/2641/
> 
> The primary topic of discussion will be LUO/KHO ABI and what type of
> backwards and forwards compatibility should be guaranteed for the ABI.
> There are different opinions from various parts of the community and
> this would be a chance to bring out all views and come to an agreement.
> More context can be found at these mailing list threads: [0][1].
> 
> Other list of potential topics, time permitting:
> 
> - TMPFS preservation [2][3].
> - Getting rid of scratch/bootmem areas.
> - KHO enablement on different architectures like Loongarch or PowerPC.
> - Making KHO work with crash reservations and KASAN.

  - Benchmarking!

I'd love to get to the point where we can actually pause a running
guest, kexec underneath it, resume it, and see that the overall steal
time it experiences is less than, say, 500ms.

(Deliberately using a really *lax* target when obviously we want it to
be more like <100ms at worst, but let's start simple. We just need to
make sure we're *designing* with latency in mind, to start with.)

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Re: [ANNOUNCE] Live Update BoF at LPC 2026

[Pasha Tatashin]

On Thu, Oct 1, 2026 at 4:10 PM David Woodhouse <dwmw2@infradead.org> wrote:
>
> On Thu, 2026-10-01 at 21:47 +0200, Pratyush Yadav wrote:
> > Hi all,
> >
> > The proposal for a Live Update BoF has been accepted. The BoF is
> > scheduled on Monday October 5th at 12:00. Event link:
> > https://lpc.events/event/20/contributions/2641/
> >
> > The primary topic of discussion will be LUO/KHO ABI and what type of
> > backwards and forwards compatibility should be guaranteed for the ABI.
> > There are different opinions from various parts of the community and
> > this would be a chance to bring out all views and come to an agreement.
> > More context can be found at these mailing list threads: [0][1].
> >
> > Other list of potential topics, time permitting:
> >
> > - TMPFS preservation [2][3].
> > - Getting rid of scratch/bootmem areas.
> > - KHO enablement on different architectures like Loongarch or PowerPC.
> > - Making KHO work with crash reservations and KASAN.
>
>   - Benchmarking!
>
> I'd love to get to the point where we can actually pause a running
> guest, kexec underneath it, resume it, and see that the overall steal
> time it experiences is less than, say, 500ms.
>
> (Deliberately using a really *lax* target when obviously we want it to
> be more like <100ms at worst, but let's start simple. We just need to
> make sure we're *designing* with latency in mind, to start with.)

Hi David,

We are, Please check out the OrphanVM presentation at the KVM MC, I
will be demonstrating a live demo.

Best,
Pasha