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From: Alan Cox <>
To: joe briggs <>
Cc: David Brodbeck <>,
	"''" <>,,
	Linux Kernel Mailing List <>,
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: <> (raw)
In-Reply-To: <>

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

      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 [Motion] Re: IDE corruption during heavy bt878-induced interr upt load [LKM] 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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