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From: Meelis Roos <mroos@linux.ee>
To: arne@schirmacher.de, linux-kernel@vger.kernel.org
Subject: Re: strange interaction between IDE and ieee1394 driver
In-Reply-To: <01C0532B.427002B0.arne@schirmacher.de>
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Message-Id: <E13xxfs-0000HO-00@roos.tartu-labor>
Date: Mon, 20 Nov 2000 22:36:24 +0200
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AS> When I user the ieee1394 subsystem to transmit data from a camcorder to an 
AS> IDE disk and the IDE driver is not using DMA, then there will be some data 
AS> lost in the ieee1394 driver. If I turn on DMA in the IDE driver (hdparm -d1 
AS> /dev/hda), I do not have any data loss in the ieee1394 driver. Also, on a 

IDE is blocking interrupts for too long in non-DMA mode? Try hdparm -u 1
in non-dma mode - this may help if interrupt latency is the issue.

-- 
Meelis Roos (mroos@linux.ee)
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