Re: partially encrypted filesystem

[Rik van Riel]

On Wed, 3 Dec 2003, Linus Torvalds wrote:

> And that in turn causes problems. You get all kinds of interesting
> deadlock schenarios when write-out requires more memory in order to
> succeed.

I suspect this should be fixable with just a simple mempool.

Opportunistic allocation of encrypt-and-IO buffers to keep
performance decent when there's lots of memory available,
fallback to the mempool when free memory is low.

In real emergencies the IO completion code could probably
free the encrypt-and-IO buffer into the mempool.

-- 
"Debugging is twice as hard as writing the code in the first place.
Therefore, if you write the code as cleverly as possible, you are,
by definition, not smart enough to debug it." - Brian W. Kernighan

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