On Thursday 20 November 2008, Trent Piepho wrote: > > > > Did you actually check the size increase? struct i2c_driver is added > > one pointer, so 4 or 8 bytes, hardly worth mentioning. struct > > i2c_adapter is added 72 bytes on x86-64, to 1360 bytes initially so an > > increase of less than 6%. Is this really such a big issue? I doubt it. > > You don't have that many i2c_adapters registered on any given system > > for it to really matter, methinks. > > Except every other subsystem in the kernel does the same thing. ?Each release > of 2.6 is significantly more bloated than the last and this is how it happens. > One "it's not that much wasted" change at a time. I do recall the "4 MByte performance problem" morphing into the "8 MByte" problem, and then into the "16 MByte" version then "32 MByte" -- for UNIX workstations, including GUI. Today's handhelds are more powerful than those! And the embedded boards I get lately have 128 MB of RAM. The real counter-argument is that memory isn't *that* tight, especially since the hardware capacity is growing. That said, maybe you have a patch to propose which would address the problem of how to *cleanly* make this infrastructure optional? - Dave
