From: Eric Dumazet Date: Fri, 15 May 2015 19:39:27 +0000 (-0700) Subject: tcp: introduce tcp_under_memory_pressure() X-Git-Tag: omap-for-v4.2/fixes-rc1^2~134^2~271^2~3 X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b8da51ebb1aa93908350f95efae73aecbc2e266c;p=pandora-kernel.git tcp: introduce tcp_under_memory_pressure() Introduce an optimized version of sk_under_memory_pressure() for TCP. Our intent is to use it in fast paths. Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- diff --git a/include/net/tcp.h b/include/net/tcp.h index 841691a296dc..0d85223efa4c 100644 --- a/include/net/tcp.h +++ b/include/net/tcp.h @@ -286,6 +286,14 @@ extern atomic_long_t tcp_memory_allocated; extern struct percpu_counter tcp_sockets_allocated; extern int tcp_memory_pressure; +/* optimized version of sk_under_memory_pressure() for TCP sockets */ +static inline bool tcp_under_memory_pressure(const struct sock *sk) +{ + if (mem_cgroup_sockets_enabled && sk->sk_cgrp) + return !!sk->sk_cgrp->memory_pressure; + + return tcp_memory_pressure; +} /* * The next routines deal with comparing 32 bit unsigned ints * and worry about wraparound (automatic with unsigned arithmetic). Reading git-diff-tree failed