The patch titled
Subject: net: tcp_memcontrol: simplify the per-memcg limit access
has been added to the -mm tree. Its filename is
net-tcp_memcontrol-simplify-the-per-memcg-limit-access.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/net-tcp_memcontrol-simplify-the-per-memcg-limit-access.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/net-tcp_memcontrol-simplify-the-per-memcg-limit-access.patch
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------------------------------------------------------
From: Johannes Weiner <hannes@xxxxxxxxxxx>
Subject: net: tcp_memcontrol: simplify the per-memcg limit access
tcp_memcontrol replicates the global sysctl_mem limit array per cgroup,
but it only ever sets these entries to the value of the memory_allocated
page_counter limit. Use the latter directly.
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
Reviewed-by: Vladimir Davydov <vdavydov@xxxxxxxxxxxxx>
Acked-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/memcontrol.h | 1 -
include/net/sock.h | 8 +++++---
net/ipv4/tcp_memcontrol.c | 8 --------
3 files changed, 5 insertions(+), 12 deletions(-)
diff -puN include/linux/memcontrol.h~net-tcp_memcontrol-simplify-the-per-memcg-limit-access include/linux/memcontrol.h
--- a/include/linux/memcontrol.h~net-tcp_memcontrol-simplify-the-per-memcg-limit-access
+++ a/include/linux/memcontrol.h
@@ -89,7 +89,6 @@ struct cg_proto {
struct page_counter memory_allocated; /* Current allocated memory. */
int memory_pressure;
bool active;
- long sysctl_mem[3];
/*
* memcg field is used to find which memcg we belong directly
* Each memcg struct can hold more than one cg_proto, so container_of
diff -puN include/net/sock.h~net-tcp_memcontrol-simplify-the-per-memcg-limit-access include/net/sock.h
--- a/include/net/sock.h~net-tcp_memcontrol-simplify-the-per-memcg-limit-access
+++ a/include/net/sock.h
@@ -1160,10 +1160,12 @@ static inline void sk_enter_memory_press
static inline long sk_prot_mem_limits(const struct sock *sk, int index)
{
- long *prot = sk->sk_prot->sysctl_mem;
+ long limit = sk->sk_prot->sysctl_mem[index];
+
if (mem_cgroup_sockets_enabled && sk->sk_cgrp)
- prot = sk->sk_cgrp->sysctl_mem;
- return prot[index];
+ limit = min_t(long, limit, sk->sk_cgrp->memory_allocated.limit);
+
+ return limit;
}
static inline void memcg_memory_allocated_add(struct cg_proto *prot,
diff -puN net/ipv4/tcp_memcontrol.c~net-tcp_memcontrol-simplify-the-per-memcg-limit-access net/ipv4/tcp_memcontrol.c
--- a/net/ipv4/tcp_memcontrol.c~net-tcp_memcontrol-simplify-the-per-memcg-limit-access
+++ a/net/ipv4/tcp_memcontrol.c
@@ -21,9 +21,6 @@ int tcp_init_cgroup(struct mem_cgroup *m
if (!cg_proto)
return 0;
- cg_proto->sysctl_mem[0] = sysctl_tcp_mem[0];
- cg_proto->sysctl_mem[1] = sysctl_tcp_mem[1];
- cg_proto->sysctl_mem[2] = sysctl_tcp_mem[2];
cg_proto->memory_pressure = 0;
cg_proto->memcg = memcg;
@@ -54,7 +51,6 @@ EXPORT_SYMBOL(tcp_destroy_cgroup);
static int tcp_update_limit(struct mem_cgroup *memcg, unsigned long nr_pages)
{
struct cg_proto *cg_proto;
- int i;
int ret;
cg_proto = tcp_prot.proto_cgroup(memcg);
@@ -65,10 +61,6 @@ static int tcp_update_limit(struct mem_c
if (ret)
return ret;
- for (i = 0; i < 3; i++)
- cg_proto->sysctl_mem[i] = min_t(long, nr_pages,
- sysctl_tcp_mem[i]);
-
if (!cg_proto->active) {
/*
* The active flag needs to be written after the static_key
_
Patches currently in -mm which might be from hannes@xxxxxxxxxxx are
maintainers-make-vladimir-co-maintainer-of-the-memory-controller.patch
mm-page_alloc-generalize-the-dirty-balance-reserve.patch
proc-meminfo-estimate-available-memory-more-conservatively.patch
mm-memcontrol-export-root_mem_cgroup.patch
net-tcp_memcontrol-properly-detect-ancestor-socket-pressure.patch
net-tcp_memcontrol-remove-bogus-hierarchy-pressure-propagation.patch
net-tcp_memcontrol-protect-all-tcp_memcontrol-calls-by-jump-label.patch
net-tcp_memcontrol-remove-dead-per-memcg-count-of-allocated-sockets.patch
net-tcp_memcontrol-simplify-the-per-memcg-limit-access.patch
net-tcp_memcontrol-sanitize-tcp-memory-accounting-callbacks.patch
net-tcp_memcontrol-simplify-linkage-between-socket-and-page-counter.patch
mm-memcontrol-generalize-the-socket-accounting-jump-label.patch
mm-memcontrol-do-not-account-memoryswap-on-unified-hierarchy.patch
mm-memcontrol-move-socket-code-for-unified-hierarchy-accounting.patch
mm-memcontrol-account-socket-memory-in-unified-hierarchy-memory-controller.patch
mm-memcontrol-hook-up-vmpressure-to-socket-pressure.patch
mm-memcontrol-switch-to-the-updated-jump-label-api.patch
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