Subject: kern/3546: Not all disk I/O reported in statistics.
To: None <firstname.lastname@example.org>
From: Lennart Augustsson <email@example.com>
Date: 04/27/1997 00:10:36
>Synopsis: Not all disk I/O reported in statistics.
>Responsible: kern-bug-people (Kernel Bug People)
>Arrival-Date: Sat Apr 26 15:20:01 1997
>Originator: Lennart Augustsson
Department of Computing Science, Chalmers University
>Release: NetBSD-current 97-04-26
System: NetBSD calvin 1.2D NetBSD 1.2D (CALVIN) #32: Sat Apr 26 19:35:47 MEST 1997 augustss@calvin:/users/NetBSD/src/sys/arch/i386/compile/CALVIN i386
I/O on SCSI devices that are performed directly with the ioctl()
that executes SCSI commands are not counted in the disk statistics.
Run a program that does direct I/O (I have a program that reads audio
CDs) and check iostat.
Well, I guess some disk_busy(), disk_unbusy() calls need to be inserted,
but I'm not sure where.