Re: [PATCH] Fix dirty page accounting in redirty_page_for_writepage()

Ingo Molnar
2009-05-01T20:01:40Z

* Christoph Lameter <cl@linux.com> wrote:

> On Thu, 30 Apr 2009, Ingo Molnar wrote:
>
> > So we introduced preemption-safety in the v2 version of that commit.
> >
> > This non-atomicity will 1) either not matter 2) will be
> > irq-atomic by virtue of being within a critical section 3) can
> > be made atomic in the few remaining cases.
> >
> > And maybe, at most, introduce an opt-in API:
> > percpu_add_irqsafe().
>
> Plus percpu_add_preemptsafe().

Ok - that would be easy. Would you be interested in doing that and
would you be interested in resurrecting your old patches? They are
genuinely useful IMHO.

Ingo