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[Qemu-devel] Re: [PATCH] rtl8139: IO memory is not part of vmstate
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] Re: [PATCH] rtl8139: IO memory is not part of vmstate |
Date: |
Wed, 15 Dec 2010 21:04:36 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Wed, Dec 15, 2010 at 06:12:25PM +0100, Paolo Bonzini wrote:
> On 12/15/2010 11:00 AM, Michael S. Tsirkin wrote:
> >>Indeed, subsections are for data that is rarely needed so that
> >>there's some chance (sometimes ~100%) of migration working
> >>seemlessly.
> >
> >If a subsection arrives that qemu does
> >not know about, won't migratin fail?
>
> Yes, that's why rarely needed => some high chance of migration
> working (though no certainty).
>
> >>In this case it's either
> >>no-bump-and-live-with-the-consequences, or changing the version id.
> >
> >This was discussed to death already. version ids have the problem
> >that they don't play nicely with downstreams.
>
> Downstream version bumps don't play nicely with upstream, so
> downstream does have a reason for always-necessary subsections. But
> upstream can bump the version id as much as they care.
>
> Paolo
This assuming upstream developers do not care about downstreams.
To give a chance for downstream to cherry-pick changes, upstream
should use subsections instead of version ids too.
--
MST
- [Qemu-devel] Re: [PATCH] rtl8139: IO memory is not part of vmstate, (continued)
- [Qemu-devel] Re: [PATCH] rtl8139: IO memory is not part of vmstate, Alex Williamson, 2010/12/13
- [Qemu-devel] Re: [PATCH] rtl8139: IO memory is not part of vmstate, Michael S. Tsirkin, 2010/12/13
- [Qemu-devel] Re: [PATCH] rtl8139: IO memory is not part of vmstate, Alex Williamson, 2010/12/13
- [Qemu-devel] Re: [PATCH] rtl8139: IO memory is not part of vmstate, Michael S. Tsirkin, 2010/12/13
- [Qemu-devel] Re: [PATCH] rtl8139: IO memory is not part of vmstate, Alex Williamson, 2010/12/14
- [Qemu-devel] Re: [PATCH] rtl8139: IO memory is not part of vmstate, Michael S. Tsirkin, 2010/12/14
- [Qemu-devel] Re: [PATCH] rtl8139: IO memory is not part of vmstate, Alex Williamson, 2010/12/14
- [Qemu-devel] Re: [PATCH] rtl8139: IO memory is not part of vmstate, Paolo Bonzini, 2010/12/14
- [Qemu-devel] Re: [PATCH] rtl8139: IO memory is not part of vmstate, Michael S. Tsirkin, 2010/12/15
- [Qemu-devel] Re: [PATCH] rtl8139: IO memory is not part of vmstate, Paolo Bonzini, 2010/12/15
- [Qemu-devel] Re: [PATCH] rtl8139: IO memory is not part of vmstate,
Michael S. Tsirkin <=
- [Qemu-devel] Re: [PATCH] rtl8139: IO memory is not part of vmstate, Paolo Bonzini, 2010/12/16
- [Qemu-devel] Re: [PATCH] rtl8139: IO memory is not part of vmstate, Michael S. Tsirkin, 2010/12/15
- [Qemu-devel] Re: [PATCH] rtl8139: IO memory is not part of vmstate, Alex Williamson, 2010/12/15