Michael S. Tsirkin wrote:
The overhead will appear when you call the function, since you
will have to check the device type. I know its small, but lets not
set the wrong precedent.
Lets put it this way: we have e.g. in core/sysfs.c show_pma_counter:
I would think that sysfs would need to be updated to check for device types
anyway. The PMA is IB specific, as are several of the attributes: LID, GID,
GUID, SM SL, etc.
I'm not sure how often we'll be in transport neutral code with the need to call
a transport specific function without first checking the transport type. The
_right_ precedence may be to force the user to check the transport type before
doing so. Whether a function is optional for a given transport is up to each
transport to decide.
At this point, I'm still undecided on what approach to use.
- Sean
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