From: drew@kinglear.cs.colorado.edu (Drew Eckhardt) Subject: Re: Adaptec 1542B & > 16mb Date: Mon, 9 Aug 1993 05:17:19 GMT
In article <1.9768.2381.0N278FFB@satalink.com> john.will@satalink.com (John Will) writes:
>I've read the FAQ, but I can't seem to find anything about Adaptec 1542B
>HA's and memory sizes greater than 16mb on the ISA bus. Is this a problem
>with the pl12 kernel, or has this been addressed?
The Linux SCSI code will double-buffer for addresses > 16M if the
low level driver requests it, as is the case for the 1542 and
other ISA dma using low-level drivers.
>If this is possible, how much of a performance hit do you take with the
>double-buffering for processes in the 16-32mb range?
Not a noticeable one.
-- Boycott USL/Novell for their absurd anti-BSDI lawsuit. | Condemn Colorado for Amendment Two. | Drew Eckhardt Use Linux, the fast, flexible, and free 386 unix | drew@cs.Colorado.EDU Will administer Unix for food |