diff options
| author | Eric Dumazet <edumazet@google.com> | 2012-06-20 05:02:19 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-06-22 21:47:33 -0700 |
| commit | 7586eceb0abc0ea1c2b023e3e5d4dfd4ff40930a (patch) | |
| tree | 79fc35a3afa23896ab3e6e00b4d9d1178bfee1df /net/ipv4/route.c | |
| parent | 24ea818e305b92ad1fadcca015ae3b0c1222c497 (diff) | |
| download | linux-7586eceb0abc0ea1c2b023e3e5d4dfd4ff40930a.tar.bz2 | |
ipv4: tcp: dont cache output dst for syncookies
Don't cache output dst for syncookies, as this adds pressure on IP route
cache and rcu subsystem for no gain.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Hans Schillstrom <hans.schillstrom@ericsson.com>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/route.c')
| -rw-r--r-- | net/ipv4/route.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index a91f6d33804c..8d62d85e68dc 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -1156,7 +1156,7 @@ restart: candp = NULL; now = jiffies; - if (!rt_caching(dev_net(rt->dst.dev))) { + if (!rt_caching(dev_net(rt->dst.dev)) || (rt->dst.flags & DST_NOCACHE)) { /* * If we're not caching, just tell the caller we * were successful and don't touch the route. The @@ -2582,6 +2582,9 @@ static struct rtable *__mkroute_output(const struct fib_result *res, rt_set_nexthop(rth, fl4, res, fi, type, 0); + if (fl4->flowi4_flags & FLOWI_FLAG_RT_NOCACHE) + rth->dst.flags |= DST_NOCACHE; + return rth; } |