On Thu, 06 Oct 2011 15:54:41 +0200 Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> wrote: > From: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> > > Memory hotplug is a logic for making pages unused in the specified > range of pfn. So, some of core logics can be used for other purpose > as allocating a very large contigous memory block. > > This patch moves some functions from mm/memory_hotplug.c to > mm/page_isolation.c. This helps adding a function for large-alloc in > page_isolation.c with memory-unplug technique. > > Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> > [m.nazarewicz: reworded commit message] > Signed-off-by: Michal Nazarewicz <m.nazarewicz@xxxxxxxxxxx> > Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx> > [m.szyprowski: rebased and updated to Linux v3.0-rc1] > Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx> > CC: Michal Nazarewicz <mina86@xxxxxxxxxx> > Acked-by: Arnd Bergmann <arnd@xxxxxxxx> > > ... > > +/* > + * For migration. > + */ > + > +int test_pages_in_a_zone(unsigned long start_pfn, unsigned long end_pfn); This is a rather poor function name. Given that we're now making it a global identifier, perhaps we should give it a better name. pages_in_single_zone()? > +unsigned long scan_lru_pages(unsigned long start, unsigned long end); > +int do_migrate_range(unsigned long start_pfn, unsigned long end_pfn); > > > ... > > --- a/mm/page_isolation.c > +++ b/mm/page_isolation.c > @@ -5,6 +5,9 @@ > #include <linux/mm.h> > #include <linux/page-isolation.h> > #include <linux/pageblock-flags.h> > +#include <linux/memcontrol.h> > +#include <linux/migrate.h> > +#include <linux/mm_inline.h> > #include "internal.h" > > static inline struct page * > @@ -139,3 +142,114 @@ int test_pages_isolated(unsigned long start_pfn, unsigned long end_pfn) > spin_unlock_irqrestore(&zone->lock, flags); > return ret ? 0 : -EBUSY; > } > + > + > +/* > + * Confirm all pages in a range [start, end) is belongs to the same zone. It would be good to fix up that sentence while we're touching it. "Confirm that all pages ... belong to the same zone". > > ... > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>