Hi, On Debian GNU/Linux 12 with default settings, the command:
make -j 70000 hangs. That's because make tries to fill a pipe with 70,000 '+' characters to act as a counting semaphore to limit the number of spawned processes, but the default capacity of a pipe is 64K. I recommend initially opening the pipe in non-blocking mode, and after writing each '+' check for a failure return of EAGAIN/EWOULDBLOCK, and quit with an error message if you get that. If all the '+' writes succeed, then put the pipe in blocking mode so it works as a counting semaphore. Yes, I realize this is a ridiculous edge-case, but I think it's still technically a bug. Regards, Dianne.
