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Re: [Qemu-devel] [PATCH 4/6] hmp: Add info commands for preconfig
From: |
Igor Mammedov |
Subject: |
Re: [Qemu-devel] [PATCH 4/6] hmp: Add info commands for preconfig |
Date: |
Thu, 7 Jun 2018 17:08:47 +0200 |
On Thu, 07 Jun 2018 14:22:34 +0200
Markus Armbruster <address@hidden> wrote:
> Peter Xu <address@hidden> writes:
>
> > On Tue, Jun 05, 2018 at 01:26:34PM +0100, Dr. David Alan Gilbert (git)
> > wrote:
> >> From: "Dr. David Alan Gilbert" <address@hidden>
> >>
> >> Allow a bunch of the info commands to be used in preconfig.
> >> Could probably add most of them.
> >
> > I guess some of them may not work yet during preconfig. E.g.:
> >
> > $ ./x86_64-softmmu/qemu-system-x86_64 -preconfig -monitor stdio
> > QEMU 2.12.50 monitor - type 'help' for more information
> > (qemu) info mtree
> > address-space: memory
> > 0000000000000000-ffffffffffffffff (prio 0, i/o): system
> >
> > address-space: I/O
> > 0000000000000000-000000000000ffff (prio 0, i/o): io
> >
> > But it's fine to enable that I guess.
> >
> > (Which "info" command would you want to use during preconfig?)
> >
> >>
> >> Signed-off-by: Dr. David Alan Gilbert <address@hidden>
> >
> > Reviewed-by: Peter Xu <address@hidden>
>
> The reason for having -preconfig is us despairing of making -S do the
> right thing. We'd have to *understand* the tangled mess that is our
> startup, and rearrange it so QMP becomes available early enough for
> configuring NUMA (and other things), yet late enough for everything to
> work.
We solve concrete NUMA problem at -S time as was demonstrated by thread:
"RFC v2 0/4] enable numa configuration before machine is running from HMP/QMP"
were pros and cons are were summarized. But that won't scale to other things.
> -preconfig is a cheap hack to avoid this headache, by bypassing almost
> all of "everything".
hack should allow to move configuration steps to early stage one by one
until the point we could obsolete -S (from configuration point)
without breaking current -S users and clean up start up mess in process.
> Now you bring back some of "everything". Dangerous. You better show it
> actually works. Until you do:
Tested v2, works as expected so far.
>
> NAK
>
- Re: [Qemu-devel] [PATCH 4/6] hmp: Add info commands for preconfig, (continued)
- Re: [Qemu-devel] [PATCH 4/6] hmp: Add info commands for preconfig, Peter Xu, 2018/06/07
- Re: [Qemu-devel] [PATCH 4/6] hmp: Add info commands for preconfig, Markus Armbruster, 2018/06/07
- Re: [Qemu-devel] [PATCH 4/6] hmp: Add info commands for preconfig, Dr. David Alan Gilbert, 2018/06/07
- Re: [Qemu-devel] [PATCH 4/6] hmp: Add info commands for preconfig, Markus Armbruster, 2018/06/07
- Re: [Qemu-devel] [PATCH 4/6] hmp: Add info commands for preconfig, Dr. David Alan Gilbert, 2018/06/07
- Re: [Qemu-devel] [PATCH 4/6] hmp: Add info commands for preconfig, Markus Armbruster, 2018/06/08
- Re: [Qemu-devel] [PATCH 4/6] hmp: Add info commands for preconfig, Dr. David Alan Gilbert, 2018/06/08
- Re: [Qemu-devel] [PATCH 4/6] hmp: Add info commands for preconfig, Igor Mammedov, 2018/06/08
- Re: [Qemu-devel] [PATCH 4/6] hmp: Add info commands for preconfig, Markus Armbruster, 2018/06/08
- Re: [Qemu-devel] [PATCH 4/6] hmp: Add info commands for preconfig, Dr. David Alan Gilbert, 2018/06/08
- Re: [Qemu-devel] [PATCH 4/6] hmp: Add info commands for preconfig,
Igor Mammedov <=
- Re: [Qemu-devel] [PATCH 4/6] hmp: Add info commands for preconfig, Markus Armbruster, 2018/06/08
Re: [Qemu-devel] [PATCH 4/6] hmp: Add info commands for preconfig, Igor Mammedov, 2018/06/07
[Qemu-devel] [PATCH 5/6] hmp: add exit_preconfig, Dr. David Alan Gilbert (git), 2018/06/05
[Qemu-devel] [PATCH 6/6] hmp: Allow HMP in preconfig state again, Dr. David Alan Gilbert (git), 2018/06/05
Re: [Qemu-devel] [PATCH 0/6] Reenable hmp for preconfig mode, Peter Xu, 2018/06/07