On 06/02/2010 05:06 PM, Dan Magenheimer wrote:

It is intended that there be different flavours but only
one can be used in any running kernel.  A driver file/module
claims the cleancache_ops pointer (and should check to ensure
it is not already claimed).  And if nobody claims cleancache_ops,
the hooks should be as non-intrusive as possible.

Also note that the operations occur on the order of the number
of I/O's, so definitely a lot, but "zillion" may be a bit high. :-)

If you think this is a showstoppper, it could be changed
to be bound only at compile-time, but then (I think) the claimer
could never be a dynamically-loadable module.
  

Andrew is suggesting that rather than making cleancache_ops a pointer to
a structure, just make it a structure, so that calling a function is a
matter of cleancache_ops.func rather than cleancache_ops->func, thereby
avoiding a pointer dereference.

    J

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