Re: vDSO vs. mm : problems with ppc vdso

Andrew Morton
2006-02-28T06:47:39Z

Benjamin Herrenschmidt <benh@kernel.crashing.org> wrote:
>
> > > I'll send the patch as a reply to this message.
> >
> > Please copy linux-arch.
>
> Did that.

You did not, you meanie.

> > > pages in could be a problem ?
> >
> > It sounds just like a sound card DMA buffer to me - that's a solved
> > problem? (Well, we keep unsolving it, but it's a relatively common
> > pattern).
>
> Might be ... though I though the later had VM_RESERVED or some similar
> thing ... the trick with that vma is that i don't want any of these
> things to allow for COW ... But yeah, it _looks_ like it will just work
> (well... it appears to work so far anyway....)

Hugh's the man - he loves that stuff.