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70f82cfbaf
fdgrowtable() now only reallocates fd_map when necessary. This fixes fdgrowtable() to use the same logic as fdescfree() for when to free the fd_map. The logic in fdescfree() is intended to not free the initial static allocation, however the fd_map grows at a slower rate than the table does. The table is intended to hold 20 fd, but its initial map has many more slots than 20. The slot sizing causes NDSLOTS(20) through NDSLOTS(63) to be 1 which matches NDSLOTS(20), so fdescfree() was assuming that the fd_map was still the initial allocation and not freeing it. This partially reverts r244510 by reintroducing some of the logic it removed in fdgrowtable(). Reviewed by: mjg Approved by: bapt (mentor) MFC after: 2 weeks
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