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mm: slabinfo: remove CONFIG_SLABINFO

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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>
This commit is contained in:
Yang Shi 2017-11-15 17:32:03 -08:00 committed by Linus Torvalds
parent 7ad3f188aa
commit 5b36577109
5 changed files with 6 additions and 15 deletions
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6
init/Kconfig
View File

@ -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

2
mm/memcontrol.c
View File

@ -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,

2
mm/slab.c
View File

@ -4097,7 +4097,6 @@ static void cache_reap(struct work_struct *w)
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
/*

7
mm/slab_common.c
View File

@ -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)

4
mm/slub.c
View File

@ -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 */