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Date:	Thu, 20 Sep 2007 10:50:21 -0700 (PDT)
From:	Christoph Lameter <>
To:	Nick Piggin <>
cc:	Christoph Hellwig <>, Mel Gorman <>,,,
	David Chinner <>, Jens Axboe <>
Subject: Re: [13/17] Virtual compound page freeing in interrupt context

On Wed, 19 Sep 2007, Nick Piggin wrote:

> > Removing a virtual mappping *must* be done with interrupts enabled
> > since tlb_xx functions are called that rely on interrupts for
> > processor to processor communications.
> These things will clash drastically with my lazy TLB flushing and scalability
> work. Actually the lazy TLB flushing will provide a natural way to defer
> unmapping at interrupt time, and the scalability work should make it
> easier to vmap from interrupt context too, if you really need that.

Both would be good to have.

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