Re: IDE corruption during heavy bt878-induced interrupt load [LKM]

Re: IDE corruption during heavy bt878-induced interrupt load [LKM]

[joe briggs]

I forgot to mention 2.4.19 on Debian Woody, GigaByte GA-7VAXP/Athlon 
MX2500/512 MB (and several other Intel motherboards).

I am glad that you mentioned ext3 because while I curse ReiserFS, I really 
don't think that it is part of the problem. Definately PCI-dma related, but 
does onboard IDE (i.e., my system disk) use DMA in the same way that a PCI 
adapter such as Promise does? 

On Tuesday 22 April 2003 02:48 pm, you wrote:
> >I create multi-channel digital surveillance systems using cards with 4 or
> > more multiplexed bt878 framegrabbers; each one capturing 5 or more frames
> > per second on each of its two input channels (total 4 * 2 * 5 = 40 fps).
> > Typically I run using either a Promise or Adaptec HPT370 IDE-RAID
> > controller with 2 WD-120GB/8MB-cache drives striped in RAID-0, with
> > another IDE as hda for my system drive. What happens is that every few
> > seconds I get a "BTTV: RISC ERROR - resetting" from the frame grabber
> > driver. After a few days of this I have corruption on my Reiser file
> > system; which usually I am able to clean up with mkreiserfs --fix-fixable
> > or --rebuild-tree. The corruption is both on my RAID and my system drive.
> > Missing doing this maintenance action can really ruin my day.
> >
> >All comments/suggestions/etc. appreciated.
> >
> >Joe
>
> Hi,
>
> I'm seeing the same type of corruption (kernel 2.4.21pre7-ac1+acpi) when
> mencoding from BT878 to ext3 on ide raid1 (VIA 8233A on-board ide) with
> single 25 FPS. The kernel even oopsed on umount of the array, showing signs
> of memory corruption.
> I haven't come far with investigation, since I cannot affort to ruin that
> (production) system, however it seems clear to me that the v4l driver is
> the culprit. We also thought of dma contention, so my next test will be to
> switch the drives to PIO, to see if the dma traffic reduction helps.
>
> If you find some solution, please let me know
>
> Best Regards
> Andy

-- 
Joe Briggs
Briggs Media Systems
105 Burnsen Ave.
Manchester NH 01304 USA
TEL/FAX 603-232-3115 MOBILE 603-493-2386
www.briggsmedia.com