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authorYang Shi <yang.s@alibaba-inc.com>2017-11-15 17:32:03 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-15 18:21:01 -0800
commit5b36577109be007a6ecf4b65b54cbc9118463c2b (patch)
treec202e5652fab426a6214c3259fbdf0586564a066
parent7ad3f188aac15772c97523dc4ca3e8e5b6294b9c (diff)
downloadlinux-5b36577109be007a6ecf4b65b54cbc9118463c2b.tar.bz2
mm: slabinfo: remove CONFIG_SLABINFO
According to discussion with Christoph (https://marc.info/?l=linux-kernel&m=150695909709711&w=2), it sounds like it is pointless to keep CONFIG_SLABINFO around. This patch removes the CONFIG_SLABINFO config option, but /proc/slabinfo is still available. [yang.s@alibaba-inc.com: v11] Link: http://lkml.kernel.org/r/1507656303-103845-3-git-send-email-yang.s@alibaba-inc.com Link: http://lkml.kernel.org/r/1507152550-46205-3-git-send-email-yang.s@alibaba-inc.com Signed-off-by: Yang Shi <yang.s@alibaba-inc.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Christoph Lameter <cl@linux.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Pekka Enberg <penberg@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--init/Kconfig6
-rw-r--r--mm/memcontrol.c2
-rw-r--r--mm/slab.c2
-rw-r--r--mm/slab_common.c7
-rw-r--r--mm/slub.c4
5 files changed, 6 insertions, 15 deletions
diff --git a/init/Kconfig b/init/Kconfig
index 2431e0504479..9b8c187873fe 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1664,12 +1664,6 @@ config HAVE_GENERIC_DMA_COHERENT
bool
default n
-config SLABINFO
- bool
- depends on PROC_FS
- depends on SLAB || SLUB_DEBUG
- default y
-
config RT_MUTEXES
bool
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 661f046ad318..50e6906314f8 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -4049,7 +4049,7 @@ static struct cftype mem_cgroup_legacy_files[] = {
.write = mem_cgroup_reset,
.read_u64 = mem_cgroup_read_u64,
},
-#ifdef CONFIG_SLABINFO
+#if defined(CONFIG_SLAB) || defined(CONFIG_SLUB_DEBUG)
{
.name = "kmem.slabinfo",
.seq_start = memcg_slab_start,
diff --git a/mm/slab.c b/mm/slab.c
index b7095884fd93..1a6797eec828 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -4097,7 +4097,6 @@ out:
schedule_delayed_work(work, round_jiffies_relative(REAPTIMEOUT_AC));
}
-#ifdef CONFIG_SLABINFO
void get_slabinfo(struct kmem_cache *cachep, struct slabinfo *sinfo)
{
unsigned long active_objs, num_objs, active_slabs;
@@ -4405,7 +4404,6 @@ static int __init slab_proc_init(void)
return 0;
}
module_init(slab_proc_init);
-#endif
#ifdef CONFIG_HARDENED_USERCOPY
/*
diff --git a/mm/slab_common.c b/mm/slab_common.c
index 0d7fe71ff5e4..9357353bcb64 100644
--- a/mm/slab_common.c
+++ b/mm/slab_common.c
@@ -1184,8 +1184,7 @@ void cache_random_seq_destroy(struct kmem_cache *cachep)
}
#endif /* CONFIG_SLAB_FREELIST_RANDOM */
-#ifdef CONFIG_SLABINFO
-
+#if defined(CONFIG_SLAB) || defined(CONFIG_SLUB_DEBUG)
#ifdef CONFIG_SLAB
#define SLABINFO_RIGHTS (S_IWUSR | S_IRUSR)
#else
@@ -1281,7 +1280,7 @@ static int slab_show(struct seq_file *m, void *p)
return 0;
}
-#if defined(CONFIG_MEMCG) && !defined(CONFIG_SLOB)
+#if defined(CONFIG_MEMCG)
void *memcg_slab_start(struct seq_file *m, loff_t *pos)
{
struct mem_cgroup *memcg = mem_cgroup_from_css(seq_css(m));
@@ -1355,7 +1354,7 @@ static int __init slab_proc_init(void)
return 0;
}
module_init(slab_proc_init);
-#endif /* CONFIG_SLABINFO */
+#endif /* CONFIG_SLAB || CONFIG_SLUB_DEBUG */
static __always_inline void *__do_krealloc(const void *p, size_t new_size,
gfp_t flags)
diff --git a/mm/slub.c b/mm/slub.c
index 1efbb8123037..025bbb540f3d 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -5852,7 +5852,7 @@ __initcall(slab_sysfs_init);
/*
* The /proc/slabinfo ABI
*/
-#ifdef CONFIG_SLABINFO
+#ifdef CONFIG_SLUB_DEBUG
void get_slabinfo(struct kmem_cache *s, struct slabinfo *sinfo)
{
unsigned long nr_slabs = 0;
@@ -5884,4 +5884,4 @@ ssize_t slabinfo_write(struct file *file, const char __user *buffer,
{
return -EIO;
}
-#endif /* CONFIG_SLABINFO */
+#endif /* CONFIG_SLUB_DEBUG */