Projects/replay_cache_collision_avoidance and replay cache uses

[Nicolas Williams]

On Tue, Jan 13, 2009 at 01:18:42PM -0500, Jeffrey Hutzelman wrote:
> --On Tuesday, January 13, 2009 11:17:07 AM -0600 Nicolas Williams 
> <Nicolas.Williams at sun.com> wrote:
> >But NOT having such a header entry (naming a hash funciton, or rcache
> >version, or something) WILL complicate hash agility later.
> 
> Is there currently any kind of header?  I guess I sort of assumed there was 
> an extensible header there.

We can use rcache entries as headers (or trailers, given the order
reversal during expunge...).

Such a thing could be done to record an rcache creation timestamp and
initial time skew for that rcache.