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xen-devel
[Xen-devel] Re: [PATCH V3 1/2] mm: Add SECTION_ALIGN_UP() and SECTION_AL
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To: |
David Rientjes <rientjes@xxxxxxxxxx> |
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Subject: |
[Xen-devel] Re: [PATCH V3 1/2] mm: Add SECTION_ALIGN_UP() and SECTION_ALIGN_DOWN() macro |
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From: |
Daniel Kiper <dkiper@xxxxxxxxxxxx> |
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Date: |
Thu, 19 May 2011 21:56:53 +0200 |
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Cc: |
jeremy@xxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxx, ian.campbell@xxxxxxxxxx, haicheng.li@xxxxxxxxxxxxxxx, konrad.wilk@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, dan.magenheimer@xxxxxxxxxx, v.tolstov@xxxxxxxxx, Dave Hansen <dave@xxxxxxxxxxxxxxxxxx>, linux-mm@xxxxxxxxx, Andi Kleen <andi.kleen@xxxxxxxxx>, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, fengguang.wu@xxxxxxxxx, Daniel Kiper <dkiper@xxxxxxxxxxxx>, wdauchy@xxxxxxxxx |
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Thu, 19 May 2011 12:59:51 -0700 |
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On Wed, May 18, 2011 at 08:21:23PM -0700, David Rientjes wrote:
> On Tue, 17 May 2011, Daniel Kiper wrote:
>
> > diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
> > index d715200..217bcf6 100644
> > --- a/include/linux/mmzone.h
> > +++ b/include/linux/mmzone.h
> > @@ -956,6 +956,9 @@ static inline unsigned long early_pfn_to_nid(unsigned
> > long pfn)
> > #define pfn_to_section_nr(pfn) ((pfn) >> PFN_SECTION_SHIFT)
> > #define section_nr_to_pfn(sec) ((sec) << PFN_SECTION_SHIFT)
> >
> > +#define SECTION_ALIGN_UP(pfn) (((pfn) + PAGES_PER_SECTION - 1) &
> > PAGE_SECTION_MASK)
> > +#define SECTION_ALIGN_DOWN(pfn) ((pfn) & PAGE_SECTION_MASK)
> > +
> > struct page;
> > struct page_cgroup;
> > struct mem_section {
>
> These seem useful. Could you convert the code in drivers/base/node.c,
> mm/page_cgroup.c, mm/page_alloc.c, and mm/sparse.c that already do this to
> use the new macros?
No problem. I do that in next week or two.
Daniel
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