Re: [PATCH] __free_pages_ok oops

From: Linus Torvalds (torvalds@transmeta.com)
Date: Mon Feb 25 2002 - 14:35:15 EST


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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