Stephen Hemminger wrote:
I want to take all the function pointers of 'struct net_device' and
move them to 'struct net_device_ops'. This will save memory for the
case of lots of devices, as well as reduce initialization code.
Rough plan:
1. Introduce inline accessors so protocols don't dereference dev->XXX directly.
2. Fix protocols to use #1
3. Add ops field to net_device, and netdevice_register will fill in old values
in 'struct net_device'.
4...1300 Fix all network devices to use ops field
1301 Change accessors to use ops, get rid of old 'struct net_device' function
pointers.
It isn't rocket science just another code exercise. I'll patch bomb it into
something
like 2.6.23-mm first.
This should really help the people who like to do 1000's of vlans etc.
Vlan code uses several of the methods, so I'm not sure how it will save
any memory unless
you will somehow have a variable sized net_device_ops structure, or
maybe only move a
certain subset of methods into the ops struct?
Also, this will be a new chunk of memory to keep in cache and
allocate/deallocate..wouldn't it be more efficient to
keep it local to the netdevice struct?
And there is an extra cost to dereference the point to the ops before
calling methods?
Thanks,
Ben
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Ben Greear <[EMAIL PROTECTED]>
Candela Technologies Inc http://www.candelatech.com
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