Now with the previous patch, __sk_mem_raise_allocated() considers
the memory pressure of both global and the socket's memcg on a func-
wide level, making the condition of memcg's pressure in question
redundant.
Signed-off-by: Abel Wu <wuyun.abel@xxxxxxxxxxxxx>
---
net/core/sock.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/net/core/sock.c b/net/core/sock.c
index 801df091e37a..86735ad2f903 100644
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -3020,9 +3020,15 @@ int __sk_mem_raise_allocated(struct sock *sk, int size, int amt, int kind)
if (sk_has_memory_pressure(sk)) {
u64 alloc;
- if (!sk_under_memory_pressure(sk))
+ if (!sk_under_global_memory_pressure(sk))
return 1;
+
alloc = sk_sockets_allocated_read_positive(sk);
+
+ /* If under global pressure, allow the sockets that are below
+ * average memory usage to raise, trying to be fair among all
+ * the sockets under global constrains.
+ */
if (sk_prot_mem_limits(sk, 2) > alloc *
sk_mem_pages(sk->sk_wmem_queued +
atomic_read(&sk->sk_rmem_alloc) +
--
2.37.3
