On Friday 16 February 2007 05:30, Andy Speagle wrote:
> Hi all...
>
> Ok, so I'm having some rather MAJOR issues with system stability...
> I have a rather complicated setup... and am having DMA issues... big
> time.. and think perhaps I have some IRQ sharing issues. First,
> let's talk about my software and hardware...
>
> Running Gentoo 2.6.19-r5 ... with ivtv-0.10rc1 ... (have been using
> 0.9.1for a long time... with the same problems)
>
> Gigabyte GA-7VT600-L (VIA Chipset)
> Athlon XP 3200+
> 1GB RAM
> PDC20268 TX2 ATA-100 controller
> 2x PVR-350
> 1x PVR-500
> 4x WDC WD2500JB-00REA0 250GB disks...
> 1x ATAPI DVD-RW
>
> The disks are connected one each to the primary channels of the
> adapters... the DVD drive is connected as a slave on one channel..
> like this:
>
> hda - 250GB
> hdc - 250GB
> hdd - DVD
> hde - 250GB
> hdg - 250GB
>
> They are configured in various software RAID configurations... blah
> blah... when my system crashes, I typically see that the main RAID-5
> array on which my recordings reside.... goes through a resync...
> which leads me to some of the conclusions below...
<snip>
The cx23415/6 Conexant chips don't have a very good DMA engine and
certain situations can cause it to do strange things and ultimate hang.
Using a CPU frequency changer application is one know problem. RAID is
another. Whether or not it will affect you seems to depend on magic,
although VIA chipsets seem to be more prone to it than others.
Interestingly, the PVR500 is immune to these problems, almost certainly
because it has a PCI bridge, which seems to isolate the conexant chip
from any unpleasantness. (Immune provided you use the 0.10.0rc1 driver
or up, older drivers can still hang the PVR500).
I'm not sure whether interrupts are really a problem here. But I would
try to give the PVR350 an interrupt of its own (or at least, not
sharing any of the ide interrupts). To be honest, I think it is the
RAID array that is the culprit. Switching to using the harddisks 'as
is' would probably solve it.
Regards,
Hans
_______________________________________________
ivtv-users mailing list
[email protected]
http://ivtvdriver.org/mailman/listinfo/ivtv-users
