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authorWei Wang2021-09-29 10:25:12 -0700
committerDavid S. Miller2021-09-30 13:36:46 +0100
commitca057051cf25a8c198af7b73daf922ef65a3c016 (patch)
tree3454d2e3c12770adc387078b79f9f0f8434b04b6 /include
parent2bb2f5fb21b0486ff69b7b4a1fe03a760527d133 (diff)
tcp: adjust sndbuf according to sk_reserved_mem
If user sets SO_RESERVE_MEM socket option, in order to fully utilize the reserved memory in memory pressure state on the tx path, we modify the logic in sk_stream_moderate_sndbuf() to set sk_sndbuf according to available reserved memory, instead of MIN_SOCK_SNDBUF, and adjust it when new data is acked. Signed-off-by: Wei Wang <weiwan@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
-rw-r--r--include/net/sock.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/net/sock.h b/include/net/sock.h
index 447fddb384a4..c3af696258fe 100644
--- a/include/net/sock.h
+++ b/include/net/sock.h
@@ -2378,6 +2378,7 @@ static inline void sk_stream_moderate_sndbuf(struct sock *sk)
return;
val = min(sk->sk_sndbuf, sk->sk_wmem_queued >> 1);
+ val = max_t(u32, val, sk_unused_reserved_mem(sk));
WRITE_ONCE(sk->sk_sndbuf, max_t(u32, val, SOCK_MIN_SNDBUF));
}