From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pa0-f53.google.com (mail-pa0-f53.google.com [209.85.220.53]) by kanga.kvack.org (Postfix) with ESMTP id B8E536B02BE for ; Tue, 5 Apr 2016 21:25:15 -0400 (EDT) Received: by mail-pa0-f53.google.com with SMTP id bx7so5590874pad.3 for ; Tue, 05 Apr 2016 18:25:15 -0700 (PDT) Received: from mail-pa0-x235.google.com (mail-pa0-x235.google.com. [2607:f8b0:400e:c03::235]) by mx.google.com with ESMTPS id p28si682829pfi.167.2016.04.05.18.25.15 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 05 Apr 2016 18:25:15 -0700 (PDT) Received: by mail-pa0-x235.google.com with SMTP id zm5so21794505pac.0 for ; Tue, 05 Apr 2016 18:25:15 -0700 (PDT) Date: Tue, 5 Apr 2016 18:25:13 -0700 (PDT) From: David Rientjes Subject: [patch] mm, hugetlb_cgroup: round limit_in_bytes down to hugepage size Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Andrew Morton Cc: Michal Hocko , Johannes Weiner , "Kirill A. Shutemov" , linux-kernel@vger.kernel.org, linux-mm@kvack.org The page_counter rounds limits down to page size values. This makes sense, except in the case of hugetlb_cgroup where it's not possible to charge partial hugepages. Round the hugetlb_cgroup limit down to hugepage size. Signed-off-by: David Rientjes --- mm/hugetlb_cgroup.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/hugetlb_cgroup.c b/mm/hugetlb_cgroup.c --- a/mm/hugetlb_cgroup.c +++ b/mm/hugetlb_cgroup.c @@ -288,6 +288,7 @@ static ssize_t hugetlb_cgroup_write(struct kernfs_open_file *of, switch (MEMFILE_ATTR(of_cft(of)->private)) { case RES_LIMIT: + nr_pages &= ~((1 << huge_page_order(&hstates[idx])) - 1); mutex_lock(&hugetlb_limit_mutex); ret = page_counter_limit(&h_cg->hugepage[idx], nr_pages); mutex_unlock(&hugetlb_limit_mutex); -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org