Re: O_DIRECT question

[Nick Piggin]

Nick Piggin wrote:
> Linus Torvalds wrote:

> > Very basic issue: the perfect is the enemy of the good. Claiming that 
> > there is a "proper solution" is usually a total red herring. Quite 
> > often there isn't, and the "paper over" is actually not papering over, 
> > it's quite possibly the best solution there is.
>
>
> Yeah *smallish* higher order allocations are fine, and we use them all the
> time for things like stacks or networking.
>
> But Aubrey (who somehow got removed from the cc list) wants to do order 9
> allocations from userspace in his nommu environment. I'm just trying to be
> realistic when I say that this isn't going to be robust and a userspace
> solution is needed.

Oh, and also: I don't disagree with that limiting pagecache to some %
might be useful for other reasons.

--
SUSE Labs, Novell Inc.
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