Zdenek Kabelac wrote in part
> Robert Redelmeier wrote:
> > Or it could be something intrinsic about PCI busmastering
> > timings. I would try different PCI latencies in the BIOS.
> > Higher numbers mean a device can hog the bus for longer,
> > and dump buffers quicker but other devices might have to
> > wait. Lower numbers chop up each device's access so nobody
> > waits long, but total transfers are slower.
>
> Do you have BP6 board - are you sure you could select these values
> somewhere in BP6 BIOS ?
I have two BP6's. I thought it had PCI Latency in BIOS, but I checked
and it must have been a different mobo I'm remembered. Sorry.
> I've found only two things which are similir to this in Chipset Feature Menu
> Passive Release & Delayed Release - I've tried all 4 combination
> and the machine has always locked - however according to my experiments
> the longest surviving has been with both this option enabled.
> But I'm not that sure as I've not made that many test for this.
>
> Anyway is there a way that linux could set these numbers during the boot.
> (As maybe longer "Delayed Release" could possible make the machine more
> stable) ?
There should be a utility somewhere out there to change the PCI latency
of devices on the bus. It's programmed into one of the PCI config
registers for each device.
-- Robert
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