Re: [PATCH] nommu: fix kobjsize() for SLOB and SLUB

Christoph Lameter
2008-05-28T20:26:04Z

On Wed, 28 May 2008, Pekka Enberg wrote:

> (cc'ing linux-kernel)
>
> Paul Mundt wrote:
> > I have no idea why you are maintaining the page->index case here, it's
> > completely broken for page cache pages. Unless someone more familiar with
> > the page->index BUG_ON() tests objects, the BUG_ON() there should be
> > removed completely. Neither Christoph nor I were able to work out what the
> > point of the page->index tests were, and no one else has spoken up about
> > them, so it's likely safe to treat them as bogus.
>
> We use kobjsize() for pointers returned from do_mmap() which is why I kept the
> page->index case. Are we using PageCompound for those as well?

What does do_mmap have to do with page->index?