diff options
| author | Martin KaFai Lau <kafai@fb.com> | 2015-07-24 09:57:43 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-07-27 01:08:25 -0700 |
| commit | 8d6c31bf574177c8de48dd1387d96e1ec3a8b8bc (patch) | |
| tree | f1ff57e6fb696f41ab3e48c4b07fbcc539d52a33 /net/ipv4/tcp_output.c | |
| parent | 990edb428c2c85c22ca770330437db7183cbe8b5 (diff) | |
ipv6: Avoid rt6_probe() taking writer lock in the fast path
The patch checks neigh->nud_state before acquiring the writer lock.
Note that rt6_probe() is only used in CONFIG_IPV6_ROUTER_PREF.
40 udpflood processes and a /64 gateway route are used.
The gateway has NUD_PERMANENT. Each of them is run for 30s.
At the end, the total number of finished sendto():
Before: 55M
After: 95M
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
CC: Julian Anastasov <ja@ssi.bg>
CC: YOSHIFUJI Hideaki <hideaki.yoshifuji@miraclelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_output.c')
0 files changed, 0 insertions, 0 deletions