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    Subject[PATCH v6 09/16] memcg: enable accounting for file lock caches
    Date
    User can create file locks for each open file and force kernel
    to allocate small but long-living objects per each open file.

    It makes sense to account for these objects to limit the host's memory
    consumption from inside the memcg-limited container.

    Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
    ---
    fs/locks.c | 6 ++++--
    1 file changed, 4 insertions(+), 2 deletions(-)

    diff --git a/fs/locks.c b/fs/locks.c
    index 74b2a1d..1bc7ede 100644
    --- a/fs/locks.c
    +++ b/fs/locks.c
    @@ -3056,10 +3056,12 @@ static int __init filelock_init(void)
    int i;

    flctx_cache = kmem_cache_create("file_lock_ctx",
    - sizeof(struct file_lock_context), 0, SLAB_PANIC, NULL);
    + sizeof(struct file_lock_context), 0,
    + SLAB_PANIC | SLAB_ACCOUNT, NULL);

    filelock_cache = kmem_cache_create("file_lock_cache",
    - sizeof(struct file_lock), 0, SLAB_PANIC, NULL);
    + sizeof(struct file_lock), 0,
    + SLAB_PANIC | SLAB_ACCOUNT, NULL);

    for_each_possible_cpu(i) {
    struct file_lock_list_struct *fll = per_cpu_ptr(&file_lock_list, i);
    --
    1.8.3.1
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