>This implies that PIPE_BUF should be equal to the kernel's configured >page size on ia64. I modified my test to report on PIPE_BUF's returned >value, and it is 4096 on all my tested architectures, including ia64 on >2.6.8 and 2.6.12. Hmmph. According to strace, there are no system calls resulting from the fpathconf() call. How does it come up with the magic 4096 value? -Tony