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(parent: 60b173c) | patch
tcp: annotate lockless access to tcp_memory_pressure
authorEric Dumazet <edumazet@google.com>
Wed, 9 Oct 2019 22:10:15 +0000 (15:10 -0700)
committerJakub Kicinski <jakub.kicinski@netronome.com>
Thu, 10 Oct 2019 04:35:00 +0000 (21:35 -0700)
commit1f142c17d19a5618d5a633195a46f2c8be9bf232
treeb64b0a41ac143b7a2eefa20d06eab67a5c4f16datree | snapshot
parent60b173ca3d1cd1782bd0096dc17298ec242f6fb1commit | diff
tcp: annotate lockless access to tcp_memory_pressure

tcp_memory_pressure is read without holding any lock,
and its value could be changed on other cpus.

Use READ_ONCE() to annotate these lockless reads.

The write side is already using atomic ops.

Fixes: b8da51ebb1aa ("tcp: introduce tcp_under_memory_pressure()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
include/net/tcp.h diff | blob | history
net/ipv4/tcp.c diff | blob | history
Domain: System / Kernel;