Subject: IDE Performance Package V2.0
From: [email-masked] (Mark Lord)
Date: Tue, 26 Apr 1994 14:11:32 GMT
Newsgroups: comp.os.linux.announce

The patch below (gzip'd and uuencoded to get around the silly EBCDIC
email machine here) is the current version of the IDE Performance
Package for Linux, suitable for the 1.0 and 1.1 kernels.

By default, it operates exactly as if it hadn't been applied,
for backward compatibility with the tiny number of systems on which
issues are encountered.

For most systems with IDE disk drives, however, it can provide three
important advantages over the stock linux kernel:

1) vastly reduced interrupt latencies:  no more "serial port overruns"
   or choppy sound play-back etc..

2) a 30% reduction in CPU overhead for disk I/O (ie. old=62%, new=41%).

3) a 10 to 30% increase in disk data throughput on most systems.

This package consists of a kernel patch file, and also creates a new
program (hdparm.c) in linux/drivers/block, along with README.hd
in the same directory.  Check out the README.hd for more info on whether
and how to enable the performance features.

Enjoy!

[email-masked]

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