linux-kernel - Re: [PATCH RFC] vm_unmap_aliases: allow callers to inhibit TLB flush

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Date:	Tue, 24 Feb 2009 23:23:05 +1100
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux Memory Management List <linux-mm@...ck.org>,
	"the arch/x86 maintainers" <x86@...nel.org>,
	Arjan van de Ven <arjan@...ux.intel.com>
Subject: Re: [PATCH RFC] vm_unmap_aliases: allow callers to inhibit TLB flush

On Tuesday 24 February 2009 06:27:01 Jeremy Fitzhardinge wrote:
> Nick Piggin wrote:
> > Here's a start for you. I think it gets rid of all the dead code and
> > data without introducing any actual conditional compilation...
>
> OK, I can get started with this, but it will need to be a runtime
> switch; a Xen kernel running native is just a normal kernel, and I don't
> think we want to disable lazy flushes in that case.

That's fine, just make it a constant 1 if !CONFIG_XEN? And otherwise
a variable?

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