Re: CD-ROM Driver Design

From: David Balazic (david.balazic@uni-mb.si)
Date: Thu Jan 13 2000 - 15:08:39 EST


There are already two file-systems for CD-audio on Linux :
 - cdfs at http://www.elis.rug.ac.be/~ronsse/cdfs/
 - audiofs at http://fly.cc.fer.hr/~ptolomei/audiofs/

Are you sure there is a need for a third one ?

The audiofs uses the CDROMREADAUDIO for reading the data and uses the
page-cache for caching.
I personally added the page-cache code , but I don't believe it makes a lot
of sense,
because when ripping audio, you read data sequentially , so the cache just
eats all free RAM
( possibly throwing out other more usefull cached data ) and gives almost
no gain.

By the way , when there is a "normal" FS on a "normal" block device, does
the data get
cached twice, once in buffer-cache and once in page-cache ?

David Balazic

--
My sig is on my other account ...

- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.rutgers.edu Please read the FAQ at http://www.tux.org/lkml/



This archive was generated by hypermail 2b29 : Sat Jan 15 2000 - 21:00:22 EST