linux-kernel - Re: [PATCH -v2] Add MCE support to KVM

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Date:	Tue, 21 Apr 2009 15:08:34 -0500
From:	Anthony Liguori <anthony@...emonkey.ws>
To:	Avi Kivity <avi@...hat.com>
CC:	Huang Ying <ying.huang@...el.com>, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, Andi Kleen <andi@...stfloor.org>
Subject: Re: [PATCH -v2] Add MCE support to KVM

Avi Kivity wrote:
> No argument.  But some kernel features will require major rework in 
> qemu before we can support them properly.  We'll still want to bring 
> them to users quickly so users can enjoy them (and we can enjoy users 
> testing them).  Waiting for a qemu rework may take a while, and we'll 
> lose valuable feedback.

Then we're failing.  If a particular implementation of a feature is 
acceptable for kvm-userspace users, and we don't take it in QEMU without 
requiring a huge amount of different work, then it suggests something is 
broken about the QEMU process.

> For this kind of work, we can provide kvm-userspace.git as a kind of 
> playground where these experiments may be made.  kvm-userspace.git 
> exists to support kvm.git; while qemu.git has a life of its own and 
> more stringent barriers to acceptance.

As long as people are using kvm-userspace.git instead of qemu.git, we're 
failing IMHO.  If kvm-userspace.git is basically the equivalent of the 
x86 git kernel tree, linux-next, or something like that, then that's a 
good thing.

Regards,

Anthony Liguori

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