8 Mar
2023
8 Mar
'23
2:10 p.m.
In PWB1, support for 'huge' files appears to have been removed. If one
compares bmap() in PWB1'S subr.c with V6's, the "'huge' fetch of
double
indirect block" code is gone. I guess PWB didn't need very large (>
8*256*512
= 1,048,576 bytes) files? I'm not sure what the _benefits_ of removing it
were, though - unless PWB was generating lots of files of between 7*256*512
and 8*256*512 bytes in length, and they wanted to avoid the overhead of the
double-indirect block? (The savings in code space are derisory - unlike in
LSX/MINI-UNIX.) Anyone know?
Noel