From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: joe briggs <jbriggs@briggsmedia.com>
Cc: David Brodbeck <DavidB@mail.interclean.com>,
"'motion@lists.frogtown.com'" <motion@pdx.frogtown.com>,
andras@t-online.de,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
motion@frogtown.com
Subject: Re: [Motion] Re: IDE corruption during heavy bt878-induced interr upt load [LKM]
Date: 24 Apr 2003 19:57:28 +0100 [thread overview]
Message-ID: <1051210647.4017.20.camel@dhcp22.swansea.linux.org.uk> (raw)
In-Reply-To: <200304240631.49222.jbriggs@briggsmedia.com>
On Iau, 2003-04-24 at 11:31, joe briggs wrote:
> Specifically, if a PCI board is DMA'ing a block of data to main memory, how
> is the operation of the direct-connect IDE device impacted? When most PCI
> devices transfer data to main memory, don't they arbitrate the bus, become
> master, and blast it accross in chunks? Doesn't onboard IDE (legacy?) use
> the DMA controller (8237 derivate I gues) to transfer?
Onboard legacy mode IDE doing PCI DMA is doing it directly. How onboard
and southbridge IDE interact is a complicated field and chipset
dependant.
prev parent reply other threads:[~2003-04-24 19:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-04-23 19:22 David Brodbeck
2003-04-23 22:13 ` joe briggs
2003-04-23 22:11 ` Alan Cox
2003-04-24 10:31 ` joe briggs
2003-04-24 18:57 ` Alan Cox [this message]
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