netdev - [NETLINK] periodically rehash table, why?

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <877itju408.fsf@kruemel.my-eitzenberger.de>
Date:	Wed, 14 Mar 2007 18:30:31 +0100
From:	Holger Eitzenberger <holger@...eitzenberger.de>
To:	netdev@...r.kernel.org
Subject: [NETLINK] periodically rehash table, why?

Hi,

in nl_pid_hash_dilute() there is:

   if (unlikely(avg > 1) && nl_pid_hash_rehash(hash, 1))
      return 1;

      if (unlikely(len > avg) && time_after(jiffies, hash->rehash_time)) {
         nl_pid_hash_rehash(hash, 0);
         return 1;
      }

I don't see a reason why periodically rehashing might help in any way
(without resizing).  Is there a reason for that?

Thanks.  /holger

-
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