memcg: enable accounting of ipc resources

When user creates IPC objects it forces kernel to allocate memory for
these long-living objects.

It makes sense to account them to restrict the host's memory consumption
from inside the memcg-limited container.

This patch enables accounting for IPC shared memory segments, messages
semaphores and semaphore's undo lists.

Link: https://lkml.kernel.org/r/d6507b06-4df6-78f8-6c54-3ae86e3b5339@virtuozzo.com
Signed-off-by: Vasily Averin <vvs@virtuozzo.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Andrei Vagin <avagin@gmail.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bp@suse.de>
Cc: Christian Brauner <christian.brauner@ubuntu.com>
Cc: Dmitry Safonov <0x7f454c46@gmail.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Jeff Layton <jlayton@kernel.org>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Jiri Slaby <jirislaby@kernel.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Kirill Tkhai <ktkhai@virtuozzo.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Roman Gushchin <guro@fb.com>
Cc: Serge Hallyn <serge@hallyn.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Yutian Yang <nglaive@gmail.com>
Cc: Zefan Li <lizefan.x@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/ipc/msg.c b/ipc/msg.c
index 6810276..a0d0577 100644 (file)
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -147,7 +147,7 @@ static int newque(struct ipc_namespace *ns, struct ipc_params *params)
        key_t key = params->key;
        int msgflg = params->flg;
 
-       msq = kmalloc(sizeof(*msq), GFP_KERNEL);
+       msq = kmalloc(sizeof(*msq), GFP_KERNEL_ACCOUNT);
        if (unlikely(!msq))
                return -ENOMEM;
 

diff --git a/ipc/sem.c b/ipc/sem.c
index 971e75d..1a8b9f0 100644 (file)
--- a/ipc/sem.c
+++ b/ipc/sem.c
@@ -514,7 +514,7 @@ static struct sem_array *sem_alloc(size_t nsems)
        if (nsems > (INT_MAX - sizeof(*sma)) / sizeof(sma->sems[0]))
                return NULL;
 
-       sma = kvzalloc(struct_size(sma, sems, nsems), GFP_KERNEL);
+       sma = kvzalloc(struct_size(sma, sems, nsems), GFP_KERNEL_ACCOUNT);
        if (unlikely(!sma))
                return NULL;
 
@@ -1855,7 +1855,7 @@ static inline int get_undo_list(struct sem_undo_list **undo_listp)
 
        undo_list = current->sysvsem.undo_list;
        if (!undo_list) {
-               undo_list = kzalloc(sizeof(*undo_list), GFP_KERNEL);
+               undo_list = kzalloc(sizeof(*undo_list), GFP_KERNEL_ACCOUNT);
                if (undo_list == NULL)
                        return -ENOMEM;
                spin_lock_init(&undo_list->lock);
@@ -1941,7 +1941,7 @@ static struct sem_undo *find_alloc_undo(struct ipc_namespace *ns, int semid)
 
        /* step 2: allocate new undo structure */
        new = kvzalloc(sizeof(struct sem_undo) + sizeof(short)*nsems,
-                      GFP_KERNEL);
+                      GFP_KERNEL_ACCOUNT);
        if (!new) {
                ipc_rcu_putref(&sma->sem_perm, sem_rcu_free);
                return ERR_PTR(-ENOMEM);
@@ -2005,7 +2005,8 @@ static long do_semtimedop(int semid, struct sembuf __user *tsops,
        if (nsops > ns->sc_semopm)
                return -E2BIG;
        if (nsops > SEMOPM_FAST) {
-               sops = kvmalloc_array(nsops, sizeof(*sops), GFP_KERNEL);
+               sops = kvmalloc_array(nsops, sizeof(*sops),
+                                     GFP_KERNEL_ACCOUNT);
                if (sops == NULL)
                        return -ENOMEM;
        }

diff --git a/ipc/shm.c b/ipc/shm.c
index 748933e..ab749be 100644 (file)
--- a/ipc/shm.c
+++ b/ipc/shm.c
@@ -619,7 +619,7 @@ static int newseg(struct ipc_namespace *ns, struct ipc_params *params)
                        ns->shm_tot + numpages > ns->shm_ctlall)
                return -ENOSPC;
 
-       shp = kmalloc(sizeof(*shp), GFP_KERNEL);
+       shp = kmalloc(sizeof(*shp), GFP_KERNEL_ACCOUNT);
        if (unlikely(!shp))
                return -ENOMEM;