linux-kernel - Re: [PATCH] Bugfix for VMI paravirt ops

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Message-ID: <4615982A.1070700@vmware.com>
Date:	Thu, 05 Apr 2007 17:45:30 -0700
From:	Zachary Amsden <zach@...are.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
CC:	Andi Kleen <ak@...e.de>, Andrew Morton <akpm@...l.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...l.org>
Subject: Re: [PATCH] Bugfix for VMI paravirt ops

Jeremy Fitzhardinge wrote:
> Zachary Amsden wrote:
>   
>> So the clean fix for this is still even further out.  I don't think I
>> want to hook kmap/unmap as paravirt-ops.
>>     
>
> Yes, it seems like overkill.
>
> How about something like adding PARAVIRT_LAZY_FLUSH as an argument to
> set_lazy_mode?  It would be valid to use at any time, and it would flush
> any pending work while still remaining in whatever lazy mode its
> currently in.  That way kmap_atomic can flush anything pending without
> having to muck around with the current lazy state.
>   

Yes, thought about several solutions, and this seems the best.  But it 
requires a new paravirt-op.

Zach

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