The patch titled
memory controller: soft limit refactor reclaim flags
has been added to the -mm tree. Its filename is
memory-controller-soft-limit-refactor-reclaim-flags-v9.patch
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See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: memory controller: soft limit refactor reclaim flags
From: Balbir Singh <balbir@xxxxxxxxxxxxxxxxxx>
Refactor mem_cgroup_hierarchical_reclaim()
Refactor the arguments passed to mem_cgroup_hierarchical_reclaim() into
flags, so that new parameters don't have to be passed as we make the
reclaim routine more flexible
Signed-off-by: Balbir Singh <balbir@xxxxxxxxxxxxxxxxxx>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx>
Cc: Li Zefan <lizf@xxxxxxxxxxxxxx>
Cc: KOSAKI Motohiro <kosaki.motohiro@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 25 +++++++++++++++++++------
1 file changed, 19 insertions(+), 6 deletions(-)
diff -puN mm/memcontrol.c~memory-controller-soft-limit-refactor-reclaim-flags-v9 mm/memcontrol.c
--- a/mm/memcontrol.c~memory-controller-soft-limit-refactor-reclaim-flags-v9
+++ a/mm/memcontrol.c
@@ -252,6 +252,14 @@ enum charge_type {
#define MEMFILE_TYPE(val) (((val) >> 16) & 0xffff)
#define MEMFILE_ATTR(val) ((val) & 0xffff)
+/*
+ * Reclaim flags for mem_cgroup_hierarchical_reclaim
+ */
+#define MEM_CGROUP_RECLAIM_NOSWAP_BIT 0x0
+#define MEM_CGROUP_RECLAIM_NOSWAP (1 << MEM_CGROUP_RECLAIM_NOSWAP_BIT)
+#define MEM_CGROUP_RECLAIM_SHRINK_BIT 0x1
+#define MEM_CGROUP_RECLAIM_SHRINK (1 << MEM_CGROUP_RECLAIM_SHRINK_BIT)
+
static void mem_cgroup_get(struct mem_cgroup *mem);
static void mem_cgroup_put(struct mem_cgroup *mem);
static struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *mem);
@@ -1031,11 +1039,14 @@ mem_cgroup_select_victim(struct mem_cgro
* If shrink==true, for avoiding to free too much, this returns immedieately.
*/
static int mem_cgroup_hierarchical_reclaim(struct mem_cgroup *root_mem,
- gfp_t gfp_mask, bool noswap, bool shrink)
+ gfp_t gfp_mask,
+ unsigned long reclaim_options)
{
struct mem_cgroup *victim;
int ret, total = 0;
int loop = 0;
+ bool noswap = reclaim_options & MEM_CGROUP_RECLAIM_NOSWAP;
+ bool shrink = reclaim_options & MEM_CGROUP_RECLAIM_SHRINK;
/* If memsw_is_minimum==1, swap-out is of-no-use. */
if (root_mem->memsw_is_minimum)
@@ -1173,7 +1184,7 @@ static int __mem_cgroup_try_charge(struc
while (1) {
int ret;
- bool noswap = false;
+ unsigned long flags = 0;
ret = res_counter_charge(&mem->res, PAGE_SIZE, &fail_res,
&soft_fail_res);
@@ -1186,7 +1197,7 @@ static int __mem_cgroup_try_charge(struc
break;
/* mem+swap counter fails */
res_counter_uncharge(&mem->res, PAGE_SIZE, NULL);
- noswap = true;
+ flags |= MEM_CGROUP_RECLAIM_NOSWAP;
mem_over_limit = mem_cgroup_from_res_counter(fail_res,
memsw);
} else
@@ -1198,7 +1209,7 @@ static int __mem_cgroup_try_charge(struc
goto nomem;
ret = mem_cgroup_hierarchical_reclaim(mem_over_limit, gfp_mask,
- noswap, false);
+ flags);
if (ret)
continue;
@@ -2010,7 +2021,7 @@ static int mem_cgroup_resize_limit(struc
break;
progress = mem_cgroup_hierarchical_reclaim(memcg, GFP_KERNEL,
- false, true);
+ MEM_CGROUP_RECLAIM_SHRINK);
curusage = res_counter_read_u64(&memcg->res, RES_USAGE);
/* Usage is reduced ? */
if (curusage >= oldusage)
@@ -2062,7 +2073,9 @@ static int mem_cgroup_resize_memsw_limit
if (!ret)
break;
- mem_cgroup_hierarchical_reclaim(memcg, GFP_KERNEL, true, true);
+ mem_cgroup_hierarchical_reclaim(memcg, GFP_KERNEL,
+ MEM_CGROUP_RECLAIM_NOSWAP |
+ MEM_CGROUP_RECLAIM_SHRINK);
curusage = res_counter_read_u64(&memcg->memsw, RES_USAGE);
/* Usage is reduced ? */
if (curusage >= oldusage)
_
Patches currently in -mm which might be from balbir@xxxxxxxxxxxxxxxxxx are
linux-next.patch
cgroup-avoid-permanent-sleep-at-rmdir-v7.patch
memcg-remove-the-overhead-associated-with-the-root-cgroup.patch
memcg-remove-the-overhead-associated-with-the-root-cgroup-fix.patch
memcg-remove-the-overhead-associated-with-the-root-cgroup-fix-2.patch
memcg-add-comments-explaining-memory-barriers.patch
memory-controller-soft-limit-documentation-v9.patch
memory-controller-soft-limit-interface-v9.patch
memory-controller-soft-limit-organize-cgroups-v9.patch
memory-controller-soft-limit-refactor-reclaim-flags-v9.patch
memory-controller-soft-limit-reclaim-on-contention-v9.patch
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