On Wed, Sep 03, 2008 at 04:00:41PM -0500, Christoph Lameter wrote:
quoted text
> Andy Whitcroft wrote:
> 
> >  
> >  #ifndef __GENERATING_BOUNDS_H
> > @@ -208,6 +211,9 @@ __PAGEFLAG(SlubDebug, slub_debug)
> >   */
> >  TESTPAGEFLAG(Writeback, writeback) TESTSCFLAG(Writeback, writeback)
> >  __PAGEFLAG(Buddy, buddy)
> > +PAGEFLAG(BuddyCapture, buddy_capture)	/* A buddy page, but reserved. */
> > +	__SETPAGEFLAG(BuddyCapture, buddy_capture)
> > +	__CLEARPAGEFLAG(BuddyCapture, buddy_capture)
> 
> Doesnt __PAGEFLAG do what you want without having to explicitly specify
> __SET/__CLEAR?

I think I end up with one extra test that I don't need, but its
probabally much clearer.

quoted text
> How does page allocator fastpath behavior fare with this pathch?

The fastpath should be unaffected on the allocation side.  On the free
side there is an additional check for merging with a buddy under capture
as we merge buddies in __free_one_page.

-apw
--
unsubscribe notice
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/