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authorNaoya Horiguchi <n-horiguchi@ah.jp.nec.com>2017-09-09 02:11:15 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-09 04:26:45 +0300
commit8135d8926c08e553e39b0b040c6d01f0daef0676 (patch)
tree7d83be70c325f5344b5d0a4345dbee1768827995 /include/linux/migrate.h
parente8db67eb0ded3797085f032c84b5d8248f412de3 (diff)
downloadlinux-8135d8926c08e553e39b0b040c6d01f0daef0676.tar.xz
mm: memory_hotplug: memory hotremove supports thp migration
This patch enables thp migration for memory hotremove. Link: http://lkml.kernel.org/r/20170717193955.20207-11-zi.yan@sent.com Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> Signed-off-by: Zi Yan <zi.yan@cs.rutgers.edu> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: David Nellans <dnellans@nvidia.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Minchan Kim <minchan@kernel.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vlastimil Babka <vbabka@suse.cz> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Michal Hocko <mhocko@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/migrate.h')
-rw-r--r--include/linux/migrate.h15
1 files changed, 14 insertions, 1 deletions
diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index 3e0d405dc842..ce15989521a1 100644
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -35,15 +35,28 @@ static inline struct page *new_page_nodemask(struct page *page,
int preferred_nid, nodemask_t *nodemask)
{
gfp_t gfp_mask = GFP_USER | __GFP_MOVABLE | __GFP_RETRY_MAYFAIL;
+ unsigned int order = 0;
+ struct page *new_page = NULL;
if (PageHuge(page))
return alloc_huge_page_nodemask(page_hstate(compound_head(page)),
preferred_nid, nodemask);
+ if (thp_migration_supported() && PageTransHuge(page)) {
+ order = HPAGE_PMD_ORDER;
+ gfp_mask |= GFP_TRANSHUGE;
+ }
+
if (PageHighMem(page) || (zone_idx(page_zone(page)) == ZONE_MOVABLE))
gfp_mask |= __GFP_HIGHMEM;
- return __alloc_pages_nodemask(gfp_mask, 0, preferred_nid, nodemask);
+ new_page = __alloc_pages_nodemask(gfp_mask, order,
+ preferred_nid, nodemask);
+
+ if (new_page && PageTransHuge(page))
+ prep_transhuge_page(new_page);
+
+ return new_page;
}
#ifdef CONFIG_MIGRATION