linux-kernel - [PATCH v2 2/7] hugetlb: support migrate charging for surplus hugepages

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Date:   Fri, 18 May 2018 13:32:41 +0900
From:   TSUKADA Koutaro <tsukada@...ade.co.jp>
To:     Johannes Weiner <hannes@...xchg.org>,
        Michal Hocko <mhocko@...nel.org>,
        Vladimir Davydov <vdavydov.dev@...il.com>,
        Jonathan Corbet <corbet@....net>,
        "Luis R. Rodriguez" <mcgrof@...nel.org>,
        Kees Cook <keescook@...omium.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Roman Gushchin <guro@...com>,
        David Rientjes <rientjes@...gle.com>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
        Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
        Anshuman Khandual <khandual@...ux.vnet.ibm.com>,
        Marc-Andre Lureau <marcandre.lureau@...hat.com>,
        Punit Agrawal <punit.agrawal@....com>,
        Dan Williams <dan.j.williams@...el.com>,
        Vlastimil Babka <vbabka@...e.cz>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-mm@...ck.org, cgroups@...r.kernel.org, tsukada@...ade.co.jp
Subject: [PATCH v2 2/7] hugetlb: support migrate charging for surplus
 hugepages

Surplus hugepages allocated for migration also charge to memory cgroup.

Signed-off-by: TSUKADA Koutaro <tsukada@...ade.co.jp>
---
 hugetlb.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 679c151f..2e7b543 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1687,6 +1687,8 @@ static struct page *alloc_migrate_huge_page(struct hstate *h, gfp_t gfp_mask,
 	if (!page)
 		return NULL;

+	surplus_hugepage_set_charge(h, page);
+
 	/*
 	 * We do not account these pages as surplus because they are only
 	 * temporary and will be released properly on the last reference

-- 
Tsukada