linux-kernel - Re: [RFC PATCH 1/3] Weight-balanced tree

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Message-ID: <4D653F1D.2090106@redhat.com>
Date:	Wed, 23 Feb 2011 19:08:45 +0200
From:	Avi Kivity <avi@...hat.com>
To:	Alex Williamson <alex.williamson@...hat.com>
CC:	linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
	mtosatti@...hat.com, xiaoguangrong@...fujitsu.com,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [RFC PATCH 1/3] Weight-balanced tree

On 02/23/2011 07:02 PM, Alex Williamson wrote:
> >
> >  obj-$(CONFIG_WEIGHT_BALANCED_TREE) += wbtree.o
> >
> >  then kvm can select it, and the impact on non-kvm kernels is removed.
>
> Then we'd have issues trying to build an external kvm module for a
> pre-existing non-kvm kernel.  Do we care?

Officially, no.

What we typically do in these cases is copy the code into the kvm-kmod 
compatibility layer and compile it if the kernel doesn't supply it (like 
all older kernels regardless of config).

> If we were to take such a
> path, I think the default should be on, kvm would depend on it, but we
> could add an option to disable it for EMBEDDED/EXPERT.  Thanks,

That would work as well.

-- 
error compiling committee.c: too many arguments to function

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