From 78c997a4be7d1ed3ff4c27f23d30a0185d39bcbf Mon Sep 17 00:00:00 2001 From: "Chen, Kenneth W" Date: Fri, 31 Mar 2006 02:30:01 -0800 Subject: [PATCH] hugetlb: don't allow free hugetlb count fall below reserved count With strict page reservation, I think kernel should enforce number of free hugetlb page don't fall below reserved count. Currently it is possible in the sysctl path. Add proper check in sysctl to disallow that. Signed-off-by: Ken Chen Cc: David Gibson Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/hugetlb.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/hugetlb.c b/mm/hugetlb.c index d87885eb4acc..832f676ca038 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -334,6 +334,7 @@ static unsigned long set_max_huge_pages(unsigned long count) return nr_huge_pages; spin_lock(&hugetlb_lock); + count = max(count, reserved_huge_pages); try_to_free_low(count); while (count < nr_huge_pages) { struct page *page = dequeue_huge_page(NULL, 0); -- cgit v1.2.2