FEX-Emu/linux
1
0
Fork 0
mirror of https://github.com/FEX-Emu/linux.git synced 2024-12-16 14:02:10 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

tcp_memcontrol: Cleanup/fix cg_proto->memory_pressure handling.

Browse Source 
kill memcg_tcp_enter_memory_pressure.  The only function of
memcg_tcp_enter_memory_pressure was to reduce deal with the
unnecessary abstraction that was tcp_memcontrol.  Now that struct
tcp_memcontrol is gone remove this unnecessary function, the
unnecessary function pointer, and modify sk_enter_memory_pressure to
set this field directly, just as sk_leave_memory_pressure cleas this
field directly.

This fixes a small bug I intruduced when killing struct tcp_memcontrol
that caused memcg_tcp_enter_memory_pressure to never be called and
thus failed to ever set cg_proto->memory_pressure.

Remove the cg_proto enter_memory_pressure function as it now serves
no useful purpose.

Don't test cg_proto->memory_presser in sk_leave_memory_pressure before
clearing it.  The test was originally there to ensure that the pointer
was non-NULL.  Now that cg_proto is not a pointer the pointer does not
matter.

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric W. Biederman 2013-12-04 20:12:04 -08:00 committed by David S. Miller
parent 86d9be263a
commit 7f2cbdc28c
2 changed files with 2 additions and 11 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
include/net/sock.h
View File

@ -1035,7 +1035,6 @@ enum cg_proto_flags {
};
struct cg_proto {
void (*enter_memory_pressure)(struct sock *sk);
struct res_counter memory_allocated; /* Current allocated memory. */
struct percpu_counter sockets_allocated; /* Current number of sockets. */
int memory_pressure;
@ -1155,8 +1154,7 @@ static inline void sk_leave_memory_pressure(struct sock *sk)
struct proto *prot = sk->sk_prot;
for (; cg_proto; cg_proto = parent_cg_proto(prot, cg_proto))
if (cg_proto->memory_pressure)
cg_proto->memory_pressure = 0;
cg_proto->memory_pressure = 0;
}
}
@ -1171,7 +1169,7 @@ static inline void sk_enter_memory_pressure(struct sock *sk)
struct proto *prot = sk->sk_prot;
for (; cg_proto; cg_proto = parent_cg_proto(prot, cg_proto))
cg_proto->enter_memory_pressure(sk);
cg_proto->memory_pressure = 1;
}
sk->sk_prot->enter_memory_pressure(sk);

7
net/ipv4/tcp_memcontrol.c
View File

@ -6,13 +6,6 @@
#include <linux/memcontrol.h>
#include <linux/module.h>
static void memcg_tcp_enter_memory_pressure(struct sock *sk)
{
if (sk->sk_cgrp->memory_pressure)
sk->sk_cgrp->memory_pressure = 1;
}
EXPORT_SYMBOL(memcg_tcp_enter_memory_pressure);
int tcp_init_cgroup(struct mem_cgroup *memcg, struct cgroup_subsys *ss)
{
/*