linux-kernel - Re: [PATCH 3/9] x86/paravirt: remove lazy mode in interrupts

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Message-Id: <1235004837.6951.6.camel@bodhitayantram.eng.vmware.com>
Date:	Wed, 18 Feb 2009 16:53:57 -0800
From:	Zachary Amsden <zach@...are.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Ingo Molnar <mingo@...e.hu>,
	the arch/x86 maintainers <x86@...nel.org>,
	Xen-devel <xen-devel@...ts.xensource.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Nick Piggin <npiggin@...e.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Alok Kataria <akataria@...are.com>,
	Avi Kivity <avi@...hat.com>,
	Marcelo Tosatti <mtosatti@...hat.com>,
	Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
Subject: Re: [PATCH 3/9] x86/paravirt: remove lazy mode in interrupts

On Wed, 2009-02-18 at 14:30 -0800, Jeremy Fitzhardinge wrote:
> From: Jeremy Fitzhardinge <jeremy.fitzhardinge@...rix.com>
> 
> Make paravirt_lazy_mode() always return PARAVIRT_LAZY_NONE
> when in an interrupt.  This prevents interrupt code from
> accidentally inheriting an outer lazy state, and instead
> does everything synchronously.  Outer batched operations
> are left deferred.

This looks like a good solution, but can you make paravirt_lazy_mode()
inline?  It doesn't need to be a function call.

Zach

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