Re: [PATCH next-20130703] net: sock: Add ifdef CONFIG_MEMCG_KMEMfor mem_cgroup_sockets_{init,destroy}
From: Li Zefan
Date: Wed Jul 03 2013 - 08:51:39 EST
On 2013年7月3日 20:19, Sedat Dilek wrote:
>
When "CONFIG_MEMCG_KMEM=n" I see this in my build-log:
>
>
LD init/built-in.o
>
mm/built-in.o: In function `mem_cgroup_css_free':
>
memcontrol.c:(.text+0x5caa6): undefined reference to `mem_cgroup_sockets_destroy'
>
make[2]: *** [vmlinux] Error 1
>
>
Inspired by the ifdef for mem_cgroup_sockets_{init,destroy} here...
>
>
[ net/core/sock.c ]
>
>
#ifdef CONFIG_MEMCG_KMEM
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int mem_cgroup_sockets_init()
>
...
>
void mem_cgroup_sockets_destroy()
>
...
>
#endif
>
>
...I did the the same for both in "include/net/sock.h".
>
>
This fixes the issue for me in next-20130703.
>
>
Signed-off-by: Sedat Dilek <sedat.dilek@xxxxxxxxx>
Maybe it's better to add memcg_destroy_kmem(), to pair with
memcg_init_kmem().
This patch can be folded into "memcg: use css_get/put when charging/uncharging kmem"
=======================
[PATCH] memcg: fix build error if CONFIG_MEMCG_KMEM=n
Fix this build error:
mm/built-in.o: In function `mem_cgroup_css_free':
memcontrol.c:(.text+0x5caa6): undefined reference to
'mem_cgroup_sockets_destroy'
Reported-by: Fengguang Wu <fengguang.wu@xxxxxxxxx>
Reported-by: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Signed-off-by: Li Zefan <lizefan@xxxxxxxxxx>
---
mm/memcontrol.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 234f311..59ea6f9 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5876,6 +5876,11 @@ static int memcg_init_kmem(struct mem_cgroup *memcg, struct cgroup_subsys *ss)
return mem_cgroup_sockets_init(memcg, ss);
}
+static void memcg_destroy_kmem(struct mem_cgroup *memcg)
+{
+ mem_cgroup_sockets_destroy(memcg);
+}
+
static void kmem_cgroup_css_offline(struct mem_cgroup *memcg)
{
if (!memcg_kmem_is_active(memcg))
@@ -5915,6 +5920,10 @@ static int memcg_init_kmem(struct mem_cgroup *memcg, struct cgroup_subsys *ss)
return 0;
}
+static void memcg_destroy_kmem(struct mem_cgroup *memcg)
+{
+}
+
static void kmem_cgroup_css_offline(struct mem_cgroup *memcg)
{
}
@@ -6312,8 +6321,7 @@ static void mem_cgroup_css_free(struct cgroup *cont)
{
struct mem_cgroup *memcg = mem_cgroup_from_cont(cont);
- mem_cgroup_sockets_destroy(memcg);
-
+ memcg_destroy_kmem(memcg);
__mem_cgroup_free(memcg);
}
--
1.8.0.2
>
---
>
[ v2: git dislikes lines beginning with hash ('#'). ]
>
>
include/net/sock.h | 4 +++-
>
1 file changed, 3 insertions(+), 1 deletion(-)
>
>
diff --git a/include/net/sock.h b/include/net/sock.h
>
index ea6206c..ad4bf7f 100644
>
--- a/include/net/sock.h
>
+++ b/include/net/sock.h
>
@@ -71,6 +71,7 @@
>
struct cgroup;
>
struct cgroup_subsys;
>
#ifdef CONFIG_NET
>
+#ifdef CONFIG_MEMCG_KMEM
#if defined(CONFIG_NET) && defined(CONFIG_MEMCG_KMEM)
>
int mem_cgroup_sockets_init(struct mem_cgroup *memcg, struct cgroup_subsys *ss);
>
void mem_cgroup_sockets_destroy(struct mem_cgroup *memcg);
>
#else
>
@@ -83,7 +84,8 @@ static inline
>
void mem_cgroup_sockets_destroy(struct mem_cgroup *memcg)
>
{
>
}
>
-#endif
>
+#endif /* CONFIG_NET */
>
+#endif /* CONFIG_MEMCG_KMEM */
>
/*
>
* This structure really needs to be cleaned up.
>
* Most of it is for TCP, and not used by any of
>
--
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