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| author | Vlastimil Babka <vbabka@suse.cz> | 2021-02-24 12:01:22 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-02-24 13:38:27 -0800 |
| commit | fe2cce15d6821aea1766708a1cf031071cec815f (patch) | |
| tree | 7848e549b3ef42c9b1346bc3b138bea5f65ad6c5 | |
| parent | d930ff03c4d12621443f2d1c56d2f80745469021 (diff) | |
| download | linux-fe2cce15d6821aea1766708a1cf031071cec815f.tar.gz linux-fe2cce15d6821aea1766708a1cf031071cec815f.tar.bz2 linux-fe2cce15d6821aea1766708a1cf031071cec815f.zip | |
mm, slub: remove slub_memcg_sysfs boot param and CONFIG_SLUB_MEMCG_SYSFS_ON
The boot param and config determine the value of memcg_sysfs_enabled,
which is unused since commit 10befea91b61 ("mm: memcg/slab: use a single
set of kmem_caches for all allocations") as there are no per-memcg kmem
caches anymore.
Link: https://lkml.kernel.org/r/20210127124745.7928-1-vbabka@suse.cz
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: David Hildenbrand <david@redhat.com>
Acked-by: Roman Gushchin <guro@fb.com>
Acked-by: David Rientjes <rientjes@google.com>
Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 8 | ||||
| -rw-r--r-- | init/Kconfig | 14 | ||||
| -rw-r--r-- | mm/slub.c | 16 |
3 files changed, 0 insertions, 38 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 0ac883777318..19cfa8b9eb60 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -4899,14 +4899,6 @@ last alloc / free. For more information see Documentation/vm/slub.rst. - slub_memcg_sysfs= [MM, SLUB] - Determines whether to enable sysfs directories for - memory cgroup sub-caches. 1 to enable, 0 to disable. - The default is determined by CONFIG_SLUB_MEMCG_SYSFS_ON. - Enabling this can lead to a very high number of debug - directories and files being created under - /sys/kernel/slub. - slub_max_order= [MM, SLUB] Determines the maximum allowed order for slabs. A high setting may cause OOMs due to memory diff --git a/init/Kconfig b/init/Kconfig index ba8bd5256980..8f3a6c4fc0b4 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1861,20 +1861,6 @@ config SLUB_DEBUG SLUB sysfs support. /sys/slab will not exist and there will be no support for cache validation etc. -config SLUB_MEMCG_SYSFS_ON - default n - bool "Enable memcg SLUB sysfs support by default" if EXPERT - depends on SLUB && SYSFS && MEMCG - help - SLUB creates a directory under /sys/kernel/slab for each - allocation cache to host info and debug files. If memory - cgroup is enabled, each cache can have per memory cgroup - caches. SLUB can create the same sysfs directories for these - caches under /sys/kernel/slab/CACHE/cgroup but it can lead - to a very high number of debug files being created. This is - controlled by slub_memcg_sysfs boot parameter and this - config option determines the parameter's default value. - config COMPAT_BRK bool "Disable heap randomization" default y diff --git a/mm/slub.c b/mm/slub.c index 13e5821ce3e2..49d10e0afb76 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -4943,22 +4943,6 @@ enum slab_stat_type { #define SO_OBJECTS (1 << SL_OBJECTS) #define SO_TOTAL (1 << SL_TOTAL) -#ifdef CONFIG_MEMCG -static bool memcg_sysfs_enabled = IS_ENABLED(CONFIG_SLUB_MEMCG_SYSFS_ON); - -static int __init setup_slub_memcg_sysfs(char *str) -{ - int v; - - if (get_option(&str, &v) > 0) - memcg_sysfs_enabled = v; - - return 1; -} - -__setup("slub_memcg_sysfs=", setup_slub_memcg_sysfs); -#endif - static ssize_t show_slab_objects(struct kmem_cache *s, char *buf, unsigned long flags) { |