From: zhongjiang <zhongjiang@huawei.com>
To: akpm@linux-foundation.org
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: [PATCH] mm: fix the incorrect hugepages count
Date: Mon, 8 Aug 2016 10:49:06 +0800 [thread overview]
Message-ID: <1470624546-902-1-git-send-email-zhongjiang@huawei.com> (raw)
From: zhong jiang <zhongjiang@huawei.com>
when memory hotplug enable, free hugepages will be freed if movable node offline.
therefore, /proc/sys/vm/nr_hugepages will be incorrect.
The patch fix it by reduce the max_huge_pages when the node offline.
Signed-off-by: zhong jiang <zhongjiang@huawei.com>
---
mm/hugetlb.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index f904246..3356e3a 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1448,6 +1448,7 @@ static void dissolve_free_huge_page(struct page *page)
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);
--
1.8.3.1
--
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next reply other threads:[~2016-08-08 2:54 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-08 2:49 zhongjiang [this message]
2016-08-08 17:14 ` Mike Kravetz
2016-08-09 10:32 ` zhong jiang
2016-08-10 0:07 ` Naoya Horiguchi
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