minphys
Adjust a buffer's count to be no more than maximum physical I/O transfer size for the host architecture.
Declaration
u_int minphys(buf_t bp);Parameters
- bp:
The buffer whose byte count to modify.
Return Value
New byte count.
Discussion
physio() takes as a parameter a function to bound transfer sizes for each VNOP_STRATEGY() call. minphys() is a default implementation. It calls buf_setcount() to make the buffer's count the min() of its current count and the max I/O size for the host architecture.