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net: tcp_memcontrol: remove dead per-memcg count of allocated sockets

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The number of allocated sockets is used for calculations in the soft
limit phase, where packets are accepted but the socket is under memory
pressure.
 Since there is no soft limit phase in tcp_memcontrol, and memory
pressure is only entered when packets are already dropped, this is
actually dead code.  Remove it.

As this is the last user of parent_cg_proto(), remove that too.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: David S. Miller <davem@davemloft.net>
Reviewed-by: Vladimir Davydov <vdavydov@virtuozzo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Johannes Weiner
2016-01-14 15:21:08 -08:00
committed by Linus Torvalds
parent 3d596f7b90
commit af95d7df40
3 changed files with 3 additions and 40 deletions
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include/linux/memcontrol.h
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@@ -87,7 +87,6 @@ enum mem_cgroup_events_target {
struct cg_proto {
struct page_counter memory_allocated; /* Current allocated memory. */
struct percpu_counter sockets_allocated; /* Current number of sockets. */
int memory_pressure;
bool active;
long sysctl_mem[3];