Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 78c997a4 authored by Kenneth W Chen's avatar Kenneth W Chen Committed by Linus Torvalds
Browse files

[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: default avatarKen Chen <kenneth.w.chen@intel.com>
Cc: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent d6692183

mm/hugetlb.c

+1 −0
Original line number Diff line number Diff line
@@ -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);