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| author | Martin KaFai Lau <[email protected]> | 2015-07-24 16:57:43 +0000 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2015-07-27 08:08:25 +0000 |
| commit | 8d6c31bf574177c8de48dd1387d96e1ec3a8b8bc (patch) | |
| tree | f1ff57e6fb696f41ab3e48c4b07fbcc539d52a33 /net/ipv4/tcp_output.c | |
| parent | ipv6: Re-arrange code in rt6_probe() (diff) | |
| download | kernel-8d6c31bf574177c8de48dd1387d96e1ec3a8b8bc.tar.gz kernel-8d6c31bf574177c8de48dd1387d96e1ec3a8b8bc.zip | |
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 <[email protected]>
Cc: Hannes Frederic Sowa <[email protected]>
CC: Julian Anastasov <[email protected]>
CC: YOSHIFUJI Hideaki <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'net/ipv4/tcp_output.c')
0 files changed, 0 insertions, 0 deletions