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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-11-11 07:14:07 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-11-11 10:29:40 -0800 |
| commit | 72cdd1d971c0deb1619c5c339270570c43647a78 (patch) | |
| tree | 15e3c63cf135818ae1b5cbc9d85ef2c48c03804c /drivers/infiniband/core/addr.c | |
| parent | 46b13fc5c0f239f36e84665c73087d5fa86bfd86 (diff) | |
| download | linux-72cdd1d971c0deb1619c5c339270570c43647a78.tar.gz linux-72cdd1d971c0deb1619c5c339270570c43647a78.tar.bz2 linux-72cdd1d971c0deb1619c5c339270570c43647a78.zip | |
net: get rid of rtable->idev
It seems idev field in struct rtable has no special purpose, but adding
extra atomic ops.
We hold refcounts on the device itself (using percpu data, so pretty
cheap in current kernel).
infiniband case is solved using dst.dev instead of idev->dev
Removal of this field means routing without route cache is now using
shared data, percpu data, and only potential contention is a pair of
atomic ops on struct neighbour per forwarded packet.
About 5% speedup on routing test.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Roland Dreier <rolandd@cisco.com>
Cc: Sean Hefty <sean.hefty@intel.com>
Cc: Hal Rosenstock <hal.rosenstock@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/infiniband/core/addr.c')
| -rw-r--r-- | drivers/infiniband/core/addr.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/infiniband/core/addr.c b/drivers/infiniband/core/addr.c index a5ea1bce9689..c15fd2ea56c1 100644 --- a/drivers/infiniband/core/addr.c +++ b/drivers/infiniband/core/addr.c @@ -200,7 +200,7 @@ static int addr4_resolve(struct sockaddr_in *src_in, src_in->sin_family = AF_INET; src_in->sin_addr.s_addr = rt->rt_src; - if (rt->idev->dev->flags & IFF_LOOPBACK) { + if (rt->dst.dev->flags & IFF_LOOPBACK) { ret = rdma_translate_ip((struct sockaddr *) dst_in, addr); if (!ret) memcpy(addr->dst_dev_addr, addr->src_dev_addr, MAX_ADDR_LEN); @@ -208,12 +208,12 @@ static int addr4_resolve(struct sockaddr_in *src_in, } /* If the device does ARP internally, return 'done' */ - if (rt->idev->dev->flags & IFF_NOARP) { - rdma_copy_addr(addr, rt->idev->dev, NULL); + if (rt->dst.dev->flags & IFF_NOARP) { + rdma_copy_addr(addr, rt->dst.dev, NULL); goto put; } - neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, rt->idev->dev); + neigh = neigh_lookup(&arp_tbl, &rt->rt_gateway, rt->dst.dev); if (!neigh || !(neigh->nud_state & NUD_VALID)) { neigh_event_send(rt->dst.neighbour, NULL); ret = -ENODATA; |