[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-arm] [Qemu-devel] [PATCH v2 6/6] hw/arm/virt: Set minimum_page
From: |
Dr. David Alan Gilbert |
Subject: |
Re: [Qemu-arm] [Qemu-devel] [PATCH v2 6/6] hw/arm/virt: Set minimum_page_bits to 12 |
Date: |
Wed, 22 Jun 2016 13:17:31 +0100 |
User-agent: |
Mutt/1.6.1 (2016-04-27) |
* Peter Maydell (address@hidden) wrote:
> On 22 June 2016 at 12:54, Dr. David Alan Gilbert <address@hidden> wrote:
> > * Peter Maydell (address@hidden) wrote:
> >> On 22 June 2016 at 12:35, Dr. David Alan Gilbert <address@hidden> wrote:
> >> > Yes, my hope is that any versioned machine type should migrate to
> >> > a newer qemu with the same machine type set.
> >> >
> >> > There are really two separate things that we state with the machine
> >> > versioning:
> >> > a) that the guest view is the same
> >> > b) that the migration format is the same
> >>
> >> Well, this is true for PC.
> >
> > PC, ppc/spapr, and I think s390.
> >
> >> But my impression when we started
> >> applying versioned machine types to ARM virt was that it was
> >> signing up to (a) but not (yet) (b)...
> >
> > So that would make ARM special; the problem is we have no way
> > to communicate to the user that it's special.
>
> Is anybody testing that migration between versions for
> virt works?
I don't know (Perhaps Drew knows), but I'd love to add
a make check test for the x86 equivalent, but there's two
things I'm stuck on;
1) What to run in the guest to check it survives
2) How to know we have an old qemu binary to check.
I was thinking for (2) I could use an environment variable
and if it's not set then skip the test.
For (1) perhaps a trivial little image (like I use for postcopy)
that wouldn't check much except that the CPU/serial is still happy,
but at least migration completed OK.
You could use virt-test/avocado to run a test with a full guest;
it has options to specify source and destination qemu's separately.
Dave
>
> thanks
> -- PMM
--
Dr. David Alan Gilbert / address@hidden / Manchester, UK
- [Qemu-arm] [PATCH v2 0/6] Runtime pagesize computation, Peter Maydell, 2016/06/21
- [Qemu-arm] [PATCH v2 6/6] hw/arm/virt: Set minimum_page_bits to 12, Peter Maydell, 2016/06/21
- Re: [Qemu-arm] [Qemu-devel] [PATCH v2 6/6] hw/arm/virt: Set minimum_page_bits to 12, Andrew Jones, 2016/06/21
- Re: [Qemu-arm] [Qemu-devel] [PATCH v2 6/6] hw/arm/virt: Set minimum_page_bits to 12, Peter Maydell, 2016/06/21
- Re: [Qemu-arm] [Qemu-devel] [PATCH v2 6/6] hw/arm/virt: Set minimum_page_bits to 12, Andrew Jones, 2016/06/22
- Re: [Qemu-arm] [Qemu-devel] [PATCH v2 6/6] hw/arm/virt: Set minimum_page_bits to 12, Dr. David Alan Gilbert, 2016/06/22
- Re: [Qemu-arm] [Qemu-devel] [PATCH v2 6/6] hw/arm/virt: Set minimum_page_bits to 12, Peter Maydell, 2016/06/22
- Re: [Qemu-arm] [Qemu-devel] [PATCH v2 6/6] hw/arm/virt: Set minimum_page_bits to 12, Dr. David Alan Gilbert, 2016/06/22
- Re: [Qemu-arm] [Qemu-devel] [PATCH v2 6/6] hw/arm/virt: Set minimum_page_bits to 12, Peter Maydell, 2016/06/22
- Re: [Qemu-arm] [Qemu-devel] [PATCH v2 6/6] hw/arm/virt: Set minimum_page_bits to 12, Andrew Jones, 2016/06/22
- Re: [Qemu-arm] [Qemu-devel] [PATCH v2 6/6] hw/arm/virt: Set minimum_page_bits to 12,
Dr. David Alan Gilbert <=
- Re: [Qemu-arm] [Qemu-devel] [PATCH v2 6/6] hw/arm/virt: Set minimum_page_bits to 12, Paolo Bonzini, 2016/06/22
[Qemu-arm] [PATCH v2 1/6] migration: Remove static allocation of xzblre cache buffer, Peter Maydell, 2016/06/21
[Qemu-arm] [PATCH v2 2/6] exec.c: Remove static allocation of sub_section of sub_page, Peter Maydell, 2016/06/21
[Qemu-arm] [PATCH v2 4/6] cpu: Support a target CPU having a variable page size, Peter Maydell, 2016/06/21