Via C3-2 stepping 6.9.5 + VT8235 ide/dma/network hang

Via C3-2 stepping 6.9.5 + VT8235 ide/dma/network hang

[Jason Mancini]

Hi, I'm using Mandrake cooker kernel 2.6.7-0rc3.1 on a Via Epia/Eden M10000N
Nehemiah board with 512MB ram and a udma5-capable harddrive.  Looks like the
active drivers are vt82cxxx 3.38 and via-rhine.

1) heavy disk activity: works great for hours (hdparm -m16 -c1 -u1 -d1 -X66)
2) heavy disk activity + network load: hangs and resets, or hangs hard, 
generally within minutes.

Syslog shows dma timeouts, then interrupts lost (machine is dead at that 
point).

Was this ever resolved for other people who were having dma problems with 
the vt8235
southbridge chipset?  I can patch/hack/compile/test if someone wants me to 
try things.

Many Thanks!
Jason Mancini

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Re: Via C3-2 stepping 6.9.5 + VT8235 ide/dma/network hang

[Jason Mancini]

>Hi, I'm using Mandrake cooker kernel 2.6.7-0rc3.1 on a
>Via Epia/Eden M10000N Nehemiah board with 512MB ram
>and a udma5-capable harddrive.  Looks like the
>active drivers are vt82cxxx 3.38 and via-rhine.
>
>1) heavy disk activity: works great for hours (hdparm -m16 -c1 -u1 -d1 
>-X66)
>2) heavy disk activity + network load: hangs and resets, or hangs hard,
>generally within minutes.

Ok, I did *5* things and one of them must be the culprit, place your bets!  
;-)

1) used gcc 3.3.2-7mdk instead of 3.4.1-0.3mdk
2) enabled regparm
3) enabled preempt
4) -fomit_frame_pointer (config_frame_pointer=no)
5) changed cpu from i586 to C3-2 (i686)

The stock devel RPM kernel seems to work wonderfully, I'm just a few 
compiles away...

Many Thanks!
Jason Mancini

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