GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-07-22 23:04:43 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

inet: frag: use seqlock for hash rebuild

Browse source 
rehash is rare operation, don't force readers to take
the read-side rwlock.

Instead, we only have to detect the (rare) case where
the secret was altered while we are trying to insert
a new inetfrag queue into the table.

If it was changed, drop the bucket lock and recompute
the hash to get the 'new' chain bucket that we have to
insert into.

Joint work with Nikolay Aleksandrov.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Nikolay Aleksandrov <nikolay@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Westphal 2014-07-24 16:50:36 +02:00 • committed by David S. Miller
parent e3a57d18b0
commit ab1c724f63
6 changed files with 62 additions and 44 deletions
Download patch file Download diff file Expand all files Collapse all files

1
net/ipv6/reassembly.c
View file

@ -190,7 +190,6 @@ fq_find(struct net *net, __be32 id, const struct in6_addr *src,
arg.dst = dst;
arg.ecn = ecn;
read_lock(&ip6_frags.lock);
hash = inet6_hash_frag(id, src, dst);
q = inet_frag_find(&net->ipv6.frags, &ip6_frags, &arg, hash);