netdev - neighbour table RCU

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 31 Aug 2009 15:04:53 -0700
From:	Stephen Hemminger <shemminger@...tta.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	netdev@...r.kernel.org
Subject: neighbour table RCU

Looking at the neighbour table, it should be possible to get
rid of the two reader/writer locks.  The hash table lock is pretty
amenable to RCU, but the dynamic resizing makes it non-trivial.
Thinking of using a combination of RCU and sequence counts so that the
reader would just rescan if resize was in progress.

The reader/writer lock on the neighbour entry is more of a problem.
Probably would be simpler/faster to change it into a spinlock and
be done with it.

The reader/writer lock is also used for the proxy list hash table,
but that can just be a simple spinlock.

-- 
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html