The patch titled
Subject: fs, mm: account filp and names caches to kmemcg
has been added to the -mm tree. Its filename is
fs-mm-account-filp-and-names-caches-to-kmemcg.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/fs-mm-account-filp-and-names-caches-to-kmemcg.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/fs-mm-account-filp-and-names-caches-to-kmemcg.patch
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From: Shakeel Butt <shakeelb@xxxxxxxxxx>
Subject: fs, mm: account filp and names caches to kmemcg
The allocations from filp and names kmem caches can be directly triggered
by user space applications. A buggy application can consume a significant
amount of unaccounted system memory. Though we have not noticed such
buggy applications in our production but upon close inspection, we found
that a lot of machines spend very significant amount of memory on these
caches. So, these caches should be accounted to kmemcg.
Link: http://lkml.kernel.org/r/20171005222144.123797-1-shakeelb@xxxxxxxxxx
Signed-off-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
Cc: Alexander Viro <viro@xxxxxxxxxxxxxxxxxx>
Cc: Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Greg Thelen <gthelen@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/dcache.c | 2 +-
fs/file_table.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
diff -puN fs/dcache.c~fs-mm-account-filp-and-names-caches-to-kmemcg fs/dcache.c
--- a/fs/dcache.c~fs-mm-account-filp-and-names-caches-to-kmemcg
+++ a/fs/dcache.c
@@ -3641,7 +3641,7 @@ void __init vfs_caches_init_early(void)
void __init vfs_caches_init(void)
{
names_cachep = kmem_cache_create("names_cache", PATH_MAX, 0,
- SLAB_HWCACHE_ALIGN|SLAB_PANIC, NULL);
+ SLAB_HWCACHE_ALIGN|SLAB_PANIC|SLAB_ACCOUNT, NULL);
dcache_init();
inode_init();
diff -puN fs/file_table.c~fs-mm-account-filp-and-names-caches-to-kmemcg fs/file_table.c
--- a/fs/file_table.c~fs-mm-account-filp-and-names-caches-to-kmemcg
+++ a/fs/file_table.c
@@ -312,7 +312,7 @@ void put_filp(struct file *file)
void __init files_init(void)
{
filp_cachep = kmem_cache_create("filp", sizeof(struct file), 0,
- SLAB_HWCACHE_ALIGN | SLAB_PANIC, NULL);
+ SLAB_HWCACHE_ALIGN | SLAB_PANIC | SLAB_ACCOUNT, NULL);
percpu_counter_init(&nr_files, 0, GFP_KERNEL);
}
_
Patches currently in -mm which might be from shakeelb@xxxxxxxxxx are
kvm-mm-account-kvm-related-kmem-slabs-to-kmemcg.patch
fs-mm-account-filp-and-names-caches-to-kmemcg.patch
epoll-account-epitem-and-eppoll_entry-to-kmemcg.patch
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