+ memcg-track-resource-index-in-cftype-private.patch added to -mm tree

[akpm@xxxxxxxxxxxxxxxxxxxx]

The patch titled
     Subject: memcg: track resource index in cftype private
has been added to the -mm tree.  Its filename is
     memcg-track-resource-index-in-cftype-private.patch

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------------------------------------------------------
From: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Subject: memcg: track resource index in cftype private

This patch adds a new charge type _MEMHUGETLB for tracking hugetlb
resources.  We also use cftype to encode the hugetlb resource index.  This
helps in using same memcg callbacks for hugetlb control files.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Hillf Danton <dhillf@xxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxx>
Cc: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 mm/memcontrol.c |   27 +++++++++++++++++++++------
 1 file changed, 21 insertions(+), 6 deletions(-)

diff -puN mm/memcontrol.c~memcg-track-resource-index-in-cftype-private mm/memcontrol.c
--- a/mm/memcontrol.c~memcg-track-resource-index-in-cftype-private
+++ a/mm/memcontrol.c
@@ -381,9 +381,14 @@ enum charge_type {
 #define _MEM			(0)
 #define _MEMSWAP		(1)
 #define _OOM_TYPE		(2)
-#define MEMFILE_PRIVATE(x, val)	(((x) << 16) | (val))
-#define MEMFILE_TYPE(val)	(((val) >> 16) & 0xffff)
-#define MEMFILE_ATTR(val)	((val) & 0xffff)
+#define _MEMHUGETLB		(3)
+
+/*  0 ... val ...16.... x...24...idx...32*/
+#define __MEMFILE_PRIVATE(idx, x, val)	(((idx) << 24) | ((x) << 16) | (val))
+#define MEMFILE_PRIVATE(x, val)		__MEMFILE_PRIVATE(0, x, val)
+#define MEMFILE_TYPE(val)		(((val) >> 16) & 0xff)
+#define MEMFILE_IDX(val)		(((val) >> 24) & 0xff)
+#define MEMFILE_ATTR(val)		((val) & 0xffff)
 /* Used for OOM nofiier */
 #define OOM_CONTROL		(0)
 
@@ -4003,7 +4008,7 @@ static ssize_t mem_cgroup_read(struct cg
 	struct mem_cgroup *memcg = mem_cgroup_from_cont(cont);
 	char str[64];
 	u64 val;
-	int type, name, len;
+	int type, name, len, idx;
 
 	type = MEMFILE_TYPE(cft->private);
 	name = MEMFILE_ATTR(cft->private);
@@ -4024,6 +4029,10 @@ static ssize_t mem_cgroup_read(struct cg
 		else
 			val = res_counter_read_u64(&memcg->memsw, name);
 		break;
+	case _MEMHUGETLB:
+		idx = MEMFILE_IDX(cft->private);
+		val = res_counter_read_u64(&memcg->hugepage[idx], name);
+		break;
 	default:
 		BUG();
 	}
@@ -4061,7 +4070,10 @@ static int mem_cgroup_write(struct cgrou
 			break;
 		if (type == _MEM)
 			ret = mem_cgroup_resize_limit(memcg, val);
-		else
+		else if (type == _MEMHUGETLB) {
+			int idx = MEMFILE_IDX(cft->private);
+			ret = res_counter_set_limit(&memcg->hugepage[idx], val);
+		} else
 			ret = mem_cgroup_resize_memsw_limit(memcg, val);
 		break;
 	case RES_SOFT_LIMIT:
@@ -4127,7 +4139,10 @@ static int mem_cgroup_reset(struct cgrou
 	case RES_MAX_USAGE:
 		if (type == _MEM)
 			res_counter_reset_max(&memcg->res);
-		else
+		else if (type == _MEMHUGETLB) {
+			int idx = MEMFILE_IDX(event);
+			res_counter_reset_max(&memcg->hugepage[idx]);
+		} else
 			res_counter_reset_max(&memcg->memsw);
 		break;
 	case RES_FAILCNT:
_
Subject: Subject: memcg: track resource index in cftype private

Patches currently in -mm which might be from aneesh.kumar@xxxxxxxxxxxxxxxxxx are

linux-next.patch
hugetlbfs-lockdep-annotate-root-inode-properly.patch
hugetlb-rename-max_hstate-to-hugetlb_max_hstate.patch
hugetlbfs-dont-use-err_ptr-with-vm_fault-values.patch
hugetlbfs-add-an-inline-helper-for-finding-hstate-index.patch
hugetlb-use-mmu_gather-instead-of-a-temporary-linked-list-for-accumulating-pages.patch
hugetlb-avoid-taking-i_mmap_mutex-in-unmap_single_vma-for-hugetlb.patch
hugetlb-simplify-migrate_huge_page.patch
memcg-add-hugetlb-extension.patch
hugetlb-add-charge-uncharge-calls-for-hugetlb-alloc-free.patch
memcg-track-resource-index-in-cftype-private.patch
hugetlbfs-add-memcg-control-files-for-hugetlbfs.patch
hugetlbfs-add-a-list-for-tracking-in-use-hugetlb-pages.patch
memcg-move-hugetlb-resource-count-to-parent-cgroup-on-memcg-removal.patch
hugetlb-migrate-memcg-info-from-oldpage-to-new-page-during-migration.patch
memcg-add-memory-controller-documentation-for-hugetlb-management.patch

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