> > No big change since the previous version but divided into 3 patches. > This patch is based onto mmotm-1008 and just works, IOW, mot tested in > very-bad-situation. > > What this wants to do: > allocates a contiguous chunk of pages larger than MAX_ORDER. > for device drivers (camera? etc..) > My intention is not for allocating HUGEPAGE(> MAX_ORDER). > > What this does: > allocates a contiguous chunk of page with page migration, > based on memory hotplug codes. (memory unplug is for isolating > a chunk of page from buddy allocator.) > > Consideration: > Maybe more codes can be shared with other functions > (memory hotplug, compaction..) > > Status: > Maybe still needs more updates, works on small test. > [1/3] ... move some codes from memory hotplug. (no functional changes) > [2/3] ... a code for searching contiguous pages. > [3/3] ... a code for allocating contig memory. > > Thanks, > -Kame > == > > 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> > --- > include/linux/page-isolation.h | 7 ++ > mm/memory_hotplug.c | 109 --------------------------------------- > mm/page_isolation.c | 114 +++++++++++++++++++++++++++++++++++++++++ > 3 files changed, 121 insertions(+), 109 deletions(-) > > Index: mmotm-1008/include/linux/page-isolation.h > =================================================================== > --- mmotm-1008.orig/include/linux/page-isolation.h > +++ mmotm-1008/include/linux/page-isolation.h > @@ -33,5 +33,12 @@ test_pages_isolated(unsigned long start_ > extern int set_migratetype_isolate(struct page *page); > extern void unset_migratetype_isolate(struct page *page); > > +/* > + * For migration. > + */ > + > +int test_pages_in_a_zone(unsigned long start_pfn, unsigned long end_pfn); > +int scan_lru_pages(unsigned long start, unsigned long end); offtopic: scan_lru_pages() return type should be unsined long. it return pfn. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>