From: Patrick McHardy Date: Thu, 31 Jan 2008 12:41:44 +0000 (-0800) Subject: [NETFILTER]: nf_conntrack: don't inline early_drop() X-Git-Tag: v2.6.25-rc1~1089^2~59 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=76eb946040a7b4c797979a9c22464b9a07890ba5;p=linux-2.6 [NETFILTER]: nf_conntrack: don't inline early_drop() early_drop() is only called *very* rarely, unfortunately gcc inlines it into the hotpath because there is only a single caller. Explicitly mark it noinline. Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- diff --git a/net/netfilter/nf_conntrack_core.c b/net/netfilter/nf_conntrack_core.c index 4a2cce1e1c..120588333c 100644 --- a/net/netfilter/nf_conntrack_core.c +++ b/net/netfilter/nf_conntrack_core.c @@ -420,7 +420,7 @@ EXPORT_SYMBOL_GPL(nf_conntrack_tuple_taken); /* There's a small race here where we may free a just-assured connection. Too bad: we're in trouble anyway. */ -static int early_drop(unsigned int hash) +static noinline int early_drop(unsigned int hash) { /* Use oldest entry, which is roughly LRU */ struct nf_conntrack_tuple_hash *h; @@ -472,8 +472,8 @@ struct nf_conn *nf_conntrack_alloc(const struct nf_conntrack_tuple *orig, /* We don't want any race condition at early drop stage */ atomic_inc(&nf_conntrack_count); - if (nf_conntrack_max - && atomic_read(&nf_conntrack_count) > nf_conntrack_max) { + if (nf_conntrack_max && + unlikely(atomic_read(&nf_conntrack_count) > nf_conntrack_max)) { unsigned int hash = hash_conntrack(orig); if (!early_drop(hash)) { atomic_dec(&nf_conntrack_count);