RRe: [patch 6/6] mm: fix pagecache write deadlocks

Nick Piggin
2006-10-15T15:57:27Z

On Sun, Oct 15, 2006 at 05:47:03PM +0200, Peter Zijlstra wrote:
> >
> > And we should really decouple it from preempt entirely, in case we
> > ever want to check for it some other way in the pagefault handler.
>
> How about we make sure all kmap_atomic implementations behave properly
> and make in_atomic true.

Hmm, but you may not be doing a copy*user within the kmap. And you may
want an atomic copy*user not within a kmap (maybe).

I think it really would be more logical to do it in a wrapper function
pagefault_disable() pagefault_enable()? ;)