linux-kernel - RE: [PATCH 00/15] hyperv: more stuff to uapi + cleanup

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Message-ID: <BN6PR03MB24816DDE5B9B094BC8277311A06A0@BN6PR03MB2481.namprd03.prod.outlook.com>
Date:   Fri, 30 Dec 2016 19:45:56 +0000
From:   KY Srinivasan <kys@...rosoft.com>
To:     Roman Kagan <rkagan@...tuozzo.com>
CC:     Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        "x86@...nel.org" <x86@...nel.org>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
        "Denis V . Lunev" <den@...nvz.org>
Subject: RE: [PATCH 00/15] hyperv: more stuff to uapi + cleanup



> -----Original Message-----
> From: Roman Kagan [mailto:rkagan@...tuozzo.com]
> Sent: Wednesday, December 28, 2016 8:57 AM
> To: KY Srinivasan <kys@...rosoft.com>
> Cc: Paolo Bonzini <pbonzini@...hat.com>; Radim Krčmář
> <rkrcmar@...hat.com>; Vitaly Kuznetsov <vkuznets@...hat.com>; Thomas
> Gleixner <tglx@...utronix.de>; Ingo Molnar <mingo@...hat.com>; H. Peter
> Anvin <hpa@...or.com>; x86@...nel.org; Haiyang Zhang
> <haiyangz@...rosoft.com>; kvm@...r.kernel.org; linux-
> kernel@...r.kernel.org; devel@...uxdriverproject.org; Denis V . Lunev
> <den@...nvz.org>
> Subject: Re: [PATCH 00/15] hyperv: more stuff to uapi + cleanup
> 
> [ Sorry for such a slow reply; flu and office relocation knocked me out
> for a while ]
> 
> On Wed, Dec 21, 2016 at 06:00:17PM +0000, KY Srinivasan wrote:
> > > -----Original Message-----
> > > From: Roman Kagan [mailto:rkagan@...tuozzo.com]
> > > Sent: Tuesday, December 20, 2016 7:56 AM
> > > Subject: [PATCH 00/15] hyperv: more stuff to uapi + cleanup
> > >
> > > Expose more Hyper-V-related definitions in the uapi header for
> > > consumption by userspace.
> > >
> > > While doing so, get rid of a number of duplications between the KVM and
> > > the guest driver code.  Also a few other cleanups are made which are not
> > > strictly necessary for the main purpose of the series but appear
> > > reasonable to do at the same time.
> > >
> > > The most controversial is the last patch which modifies the stuff
> > > already published in the uapi header, in the hope that no userspace
> > > applications have started relying on it; I'm ok dropping it if this is
> > > unacceptable.
> >
> > First, let me thank you. Broadly, this patch-set can be broken into
> > 1. Moving existing definitions around - (to make it possible to share these
> > between Hyper-V guest drivers and KVM)
> > 2. Cleanup of the existing code in the VMBUS driver (under drivers/hv).
> 
> Right.  Another significant part of the series is, where two sets of
> definitions exist for the same entity, consolidate on the one that looks
> more Linux-style, usually the one in the (currently) uapi header.
> 
> > To the extent possible, I want to take all non-KVM code through Greg's
> tree.
> > We can then modify the KVM code to use these common definitions.
> 
> Well, this patchset touches almost no KVM code, so we're fine here I
> think.
> 
> > Currently, I too am working on restructuring VMBUS driver code to
> > fully isolate all x86 dependencies.  I can work with you on
> > integration as I too am moving things around.
> 
> Great!  Do you want me to rebase on some your public tree?  (Once I
> split the patches as you requested, of course)?

I just sent out the patches that I have been working on. These are based on
Greg's char-misc tree. I do have a bunch of patches in flight that have not been
checked in yet. Sorry, I don't have a public tree I can point you to.
I will work with you and coordinate our work here.

Happy New Year!

K. Y