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| author | Martin KaFai Lau <kafai@fb.com> | 2015-05-22 20:56:06 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-05-25 13:25:35 -0400 |
| commit | d52d3997f843ffefaa8d8462790ffcaca6c74192 (patch) | |
| tree | e7ad34bdd077c3af7d75acb6b6de7199c9672091 /net/ipv6/ip6_fib.c | |
| parent | 83a09abd1a8badbbb715f928d07c65ac47709c47 (diff) | |
| download | linux-d52d3997f843ffefaa8d8462790ffcaca6c74192.tar.gz linux-d52d3997f843ffefaa8d8462790ffcaca6c74192.tar.bz2 linux-d52d3997f843ffefaa8d8462790ffcaca6c74192.zip | |
ipv6: Create percpu rt6_info
After the patch
'ipv6: Only create RTF_CACHE routes after encountering pmtu exception',
we need to compensate the performance hit (bouncing dst->__refcnt).
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: Julian Anastasov <ja@ssi.bg>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6_fib.c')
| -rw-r--r-- | net/ipv6/ip6_fib.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c index 83341b3a248d..55d19861ab20 100644 --- a/net/ipv6/ip6_fib.c +++ b/net/ipv6/ip6_fib.c @@ -154,10 +154,32 @@ static void node_free(struct fib6_node *fn) kmem_cache_free(fib6_node_kmem, fn); } +static void rt6_free_pcpu(struct rt6_info *non_pcpu_rt) +{ + int cpu; + + if (!non_pcpu_rt->rt6i_pcpu) + return; + + for_each_possible_cpu(cpu) { + struct rt6_info **ppcpu_rt; + struct rt6_info *pcpu_rt; + + ppcpu_rt = per_cpu_ptr(non_pcpu_rt->rt6i_pcpu, cpu); + pcpu_rt = *ppcpu_rt; + if (pcpu_rt) { + dst_free(&pcpu_rt->dst); + *ppcpu_rt = NULL; + } + } +} + static void rt6_release(struct rt6_info *rt) { - if (atomic_dec_and_test(&rt->rt6i_ref)) + if (atomic_dec_and_test(&rt->rt6i_ref)) { + rt6_free_pcpu(rt); dst_free(&rt->dst); + } } static void fib6_link_table(struct net *net, struct fib6_table *tb) |