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Date: Mon, 25 Feb 2002 11:35:15 -0800 (PST)
From: Linus Torvalds <torvalds@transmeta.com>
To: Benjamin LaHaise <bcrl@redhat.com>
cc: Andrea Arcangeli <andrea@suse.de>, Gerd Knorr <kraxel@bytesex.org>,
        Hugh Dickins <hugh@veritas.com>,
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        "David S. Miller" <davem@redhat.com>, Dave Jones <davej@suse.de>,
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Subject: Re: [PATCH] __free_pages_ok oops
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On Mon, 25 Feb 2002, Benjamin LaHaise wrote:
> 
> I disagree: requiring aio to execute completion in user context means 
> that we can no longer have quick completion directly from an interrupt 
> handler to a busy server executing in userland.

Note that teh IO _completion_ can happen in user land. That does not mean 
that the IO page tear-down can (or should) happen at the same time.

There are two issues here:
 - the data structures supporting the IO, built up and torn down from 
   process space.
 - the IO itself.

One is synchronous, the other is not.

		Linus

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