Subject: Re: Disk scheduling policy (Re: NEW_BUFQ_STRATEGY)
To: Thor Lancelot Simon <>
From: Matthew Orgass <>
List: tech-kern
Date: 12/01/2003 23:54:50
On 2003-12-01 wrote:
> I can think of a reasonably simple way to tune "N" if we can
> characterize the seek time of the disk... but that seems dangerous.

  The seek time = 0 case at least should be considered since then you
actually want to jump around.  In particular, now that multi-gigabyte
compact flash drives are available (which are usually quite slow), it
should be possible to do a background compile and still be able to at
least edit and save a text file with minimal delay.  On the flip side,
DVD+RW can have very high seek times.  It seems to me like there should be
four or five different types of strategies (or adjustments), with the
appropriate one selected per disk (though I know almost nothing about this
part of NetBSD...).

Matthew Orgass