Re: [PATCH] deadline io scheduler

David S. Miller
2002-09-26T06:28:39Z

From: Andrew Morton <akpm@digeo.com>
Date: Wed, 25 Sep 2002 23:15:58 -0700

I'd like to gain a solid understanding of what these three knobs do.
Could you explain that a little more?

My basic understanding of fifo_batch is:

1) fifo_batch is how many contiguous requests can be in
a "set"

2) we send out one write "set" for every two read "sets"

3) a seek works out to "seek_cost" contiguous requests,
cost wise, this gets subtracted from how many requests
the current "set" has left that are allowed to be used