* [PATCH V3 1/2] mm: Add SECTION_ALIGN_UP() and SECTION_ALIGN_DOWN() macro
@ 2011-05-17 21:37 Daniel Kiper
2011-05-19 3:21 ` David Rientjes
0 siblings, 1 reply; 3+ messages in thread
From: Daniel Kiper @ 2011-05-17 21:37 UTC (permalink / raw)
To: ian.campbell, akpm, andi.kleen, haicheng.li, fengguang.wu,
jeremy, konrad.wilk, dan.magenheimer, v.tolstov, pasik, dave,
wdauchy, rientjes, xen-devel, linux-kernel, linux-mm
Add SECTION_ALIGN_UP() and SECTION_ALIGN_DOWN() macro which aligns
given pfn to upper section and lower section boundary accordingly.
Signed-off-by: Daniel Kiper <dkiper@net-space.pl>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
include/linux/mmzone.h | 3 +++
1 files changed, 3 insertions(+), 0 deletions(-)
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 {
--
1.5.6.5
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^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH V3 1/2] mm: Add SECTION_ALIGN_UP() and SECTION_ALIGN_DOWN() macro
2011-05-17 21:37 [PATCH V3 1/2] mm: Add SECTION_ALIGN_UP() and SECTION_ALIGN_DOWN() macro Daniel Kiper
@ 2011-05-19 3:21 ` David Rientjes
2011-05-19 19:56 ` Daniel Kiper
0 siblings, 1 reply; 3+ messages in thread
From: David Rientjes @ 2011-05-19 3:21 UTC (permalink / raw)
To: Daniel Kiper
Cc: ian.campbell, Andrew Morton, Andi Kleen, haicheng.li,
fengguang.wu, jeremy, konrad.wilk, dan.magenheimer, v.tolstov,
pasik, Dave Hansen, wdauchy, xen-devel, linux-kernel, linux-mm
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?
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^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH V3 1/2] mm: Add SECTION_ALIGN_UP() and SECTION_ALIGN_DOWN() macro
2011-05-19 3:21 ` David Rientjes
@ 2011-05-19 19:56 ` Daniel Kiper
0 siblings, 0 replies; 3+ messages in thread
From: Daniel Kiper @ 2011-05-19 19:56 UTC (permalink / raw)
To: David Rientjes
Cc: Daniel Kiper, ian.campbell, Andrew Morton, Andi Kleen,
haicheng.li, fengguang.wu, jeremy, konrad.wilk, dan.magenheimer,
v.tolstov, pasik, Dave Hansen, wdauchy, xen-devel, linux-kernel,
linux-mm
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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2011-05-17 21:37 [PATCH V3 1/2] mm: Add SECTION_ALIGN_UP() and SECTION_ALIGN_DOWN() macro Daniel Kiper
2011-05-19 3:21 ` David Rientjes
2011-05-19 19:56 ` Daniel Kiper
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