While looking at Linux 2.4 code, I see the kiobuf stuff. They implement it because Linux 2.2 lacks raw device support. I am wondering whether FreeBSD has a similar mechanism already in place. My reasonings: (1) FreeBSD's buffer is variable sized while Linux's buffer is fixed sized. So in the case of FreeBSD, a buffer can easily be associated with many pages. The kiobuf in Linux seems to limit the max I/O to 64KB. (2) We have physical buffers, they can be used separately (like in physio() and swapping) or they can be built on top of regular buffers (like in clustering I/O). Thanks for any enlightment. -Zhihui To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
