Re: [Xen-devel] [Qemu-devel] [PATCH v5 00/24] ACPI reorganization for hardware-reduced API addition

[Samuel Ortiz <sameo@xxxxxxxxxxxxxxx>]

Hi Michael,

On Wed, Nov 21, 2018 at 07:35:47AM -0500, Michael S. Tsirkin wrote:
> On Mon, Nov 19, 2018 at 04:31:10PM +0100, Igor Mammedov wrote:
> > On Fri, 16 Nov 2018 17:37:54 +0100
> > Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote:
> > 
> > > On 16/11/18 17:29, Igor Mammedov wrote:
> > > > General suggestions for this series:
> > > >   1. Preferably don't do multiple changes within a patch
> > > >      neither post huge patches (unless it's pure code movement).
> > > >      (it's easy to squash patches later it necessary)
> > > >   2. Start small, pick a table generalize it and send as
> > > >      one small patchset. Tables are often independent
> > > >      and it's much easier on both author/reviewer to agree upon
> > > >      changes and rewrite it if necessary.  
> > > 
> > > How would that be done?  This series is on the bigger side, agreed, but
> > > most of it is really just code movement.  It's a starting point, having
> > > a generic ACPI library is way beyond what this is trying to do.
> > I've tried to give suggestions how to restructure series
> > on per patch basis. In my opinion it quite possible to split
> > series in several smaller ones and it should really help with
> > making series cleaner and easier/faster to review/amend/merge
> > vs what we have in v5.
> > (it's more frustrating to rework large series vs smaller one)
> > 
> > If something isn't clear, it's easy to reach out to me here
> > or directly (email/irc/github) for clarification/feed back.
> 
> I assume the #1 goal is to add reduced HW support.
From our perspective, yes. From the project's point of view, it's about
making the current ACPI code more generic and not bound to any specific
machine type.

> So another
> option to speed up merging is to just go ahead and duplicate a
> bunch of code e.g. in pc_virt.c acpi/reduced.c or in any other
> file.
It's precisely what we wanted to avoid in the very first place and we
assumed this would be largely frowned upon by the community. It's also a
burden for everyone to maintain that amount of duplicated code. Also I
suppose this would also mean we'd have to eventually de-duplicate and
factorize things in.
Honestly I'd rather not rush things out and work on code sharing first.
I'll answer Igor's numerous comments today and will start addressing
some of his concerns right aways as well.

Cheers,
Samuel.

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