Re: [mm][RFC][PATCH 0/11] mm accessor updates.

KAMEZAWA Hiroyuki
2009-12-16T11:15:44Z

On Wed, 16 Dec 2009 11:49:51 +0100
Andi Kleen <andi@firstfloor.org> wrote:

> On Wed, Dec 16, 2009 at 07:31:09PM +0900, KAMEZAWA Hiroyuki wrote:
> > On Wed, 16 Dec 2009 11:28:06 +0100
> > Andi Kleen <andi@firstfloor.org> wrote:
> >
> > > > > Also the patches didn't fare too well in testing unfortunately.
> > > > >
> > > > > I suspect we'll rather need multiple locks split per address
> > > > > space range.
> > > >
> > > > This set doesn't include any changes of the logic. Just replace all mmap_sem.
> > > > I think this is good start point (for introducing another logic etc..)
> > >
> > > The problem is that for range locking simple wrapping the locks
> > > in macros is not enough. You need more changes.
> > >
> > maybe. but removing scatterred mmap_sem from codes is the first thing to do.
> > I think this removing itself will take 3 month or a half year.
> > (So, I didn't remove mmap_sem and leave it as it is.)
>
> I suspect you would just need to change them again then.
>
Do you have alternative recommendation rather than wrapping all accesses by
special functions ?

Thanks,
-Kame