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From: terry@cs.weber.edu (A Wizard of Earth C)
Subject: Re: Device Drivers
Message-ID: <1993Feb4.035711.24791@fcom.cc.utah.edu>
Sender: news@fcom.cc.utah.edu
Organization: Weber State University (Ogden, UT)
References: <1993Feb1.165559@axion.bt.co.uk>
Date: Thu, 4 Feb 93 03:57:11 GMT
Lines: 26
In article <1993Feb1.165559@axion.bt.co.uk> lessen@axion.bt.co.uk (Lee Essen) writes:
>
>I've just been trolling through some of the source for 386bsd, specifically
>the floppy driver and the VFS code.
>
>I'm aware of the standard *open, *close, *read etc routines, but what
>is the function of the *strategy routines?
The strategy routine is used for block device drivers; "read" and family are
for character drivers.
Generally, the VFS code uses the paged memory routines to cause I/O to be
scheduled (bread/bwrite) rather than doing the I/O itself.
Terry Lambert
terry@icarus.weber.edu
terry_lambert@novell.com
---
Any opinions in this posting are my own and not those of my present
or previous employers.
--
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