netdev - RT metric sharing...

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: <20091210.141438.78359022.davem@davemloft.net>
Date:	Thu, 10 Dec 2009 14:14:38 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	netdev@...r.kernel.org
Subject: RT metric sharing...

This topic has come up a few times, but I had a reason to
consider it again.

The routing metrics take up quite a bit of space in the
dst_entry and thus every routing cache entry.

We could save some space with indirection.

Basically my idea is:

1) dst_metrics are maintained in external structure

2) when cache entry is created, read-only dst_metrics object
   is allocated for it

3) any attempt to change the metrics of such a read-only dst_entry
   cow's it, all further writes proceed as normal

We currently have 13 (so 13 * sizeof(u32) == 52) and we're probably
about to get a 14th (for the initial receive window stuff).

--
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