The patch titled
Subject: mm/hugetlb: fix incorrect hugepages count during mem hotplug
has been removed from the -mm tree. Its filename was
mm-fix-the-incorrect-hugepages-count.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: zhong jiang <zhongjiang@xxxxxxxxxx>
Subject: mm/hugetlb: fix incorrect hugepages count during mem hotplug
When memory hotplug operates, free hugepages will be freed if the movable
node is offline. Therefore, /proc/sys/vm/nr_hugepages will be incorrect.
Fix it by reducing max_huge_pages when the node is offlined.
n-horiguchi@xxxxxxxxxxxxx said:
: dissolve_free_huge_page intends to break a hugepage into buddy, and the
: destination hugepage is supposed to be allocated from the pool of the
: destination node, so the system-wide pool size is reduced. So adding
: h->max_huge_pages-- makes sense to me.
Link: http://lkml.kernel.org/r/1470624546-902-1-git-send-email-zhongjiang@xxxxxxxxxx
Signed-off-by: zhong jiang <zhongjiang@xxxxxxxxxx>
Cc: Mike Kravetz <mike.kravetz@xxxxxxxxxx>
Acked-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 1 +
1 file changed, 1 insertion(+)
diff -puN mm/hugetlb.c~mm-fix-the-incorrect-hugepages-count mm/hugetlb.c
--- a/mm/hugetlb.c~mm-fix-the-incorrect-hugepages-count
+++ a/mm/hugetlb.c
@@ -1448,6 +1448,7 @@ static void dissolve_free_huge_page(stru
list_del(&page->lru);
h->free_huge_pages--;
h->free_huge_pages_node[nid]--;
+ h->max_huge_pages--;
update_and_free_page(h, page);
}
spin_unlock(&hugetlb_lock);
_
Patches currently in -mm which might be from zhongjiang@xxxxxxxxxx are
mm-page_owner-align-with-pageblock_nr-pages.patch
mm-walk-the-zone-in-pageblock_nr_pages-steps.patch
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