Date: Sat, 3 Mar 2001 13:28:08 -0500 (EST) From: Zhiui Zhang <zzhang@cs.binghamton.edu> To: freebsd-hackers@freebsd.org Subject: Linux kiobuf stuff... Message-ID: <Pine.SOL.4.21.0103031313090.20802-100000@onyx>
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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 majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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