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Network Interface: Bus Master Problem ?



I am experiencing similar problems as well: I am running 2.4.3 and
applied your hint below, too.  

But still the problem exists for -- I assume -- Network Traffic:
I make use of two 3c59x.  When I create a lot of network traffic without
writing to the discs -- therefore my assumption -- some driver write
onto the console:

Flags; bus-master 1, dirty NNNNNNNNNN(M) OOOOOOOOOOO(P)
Every sixteen Transmission.  (where Ns, M, Os, and P are some figures).

This occurs only when carrying out bulk transfers -- I am running NPtcp
to test this issue.

Probably, someone knows how to dissable something for the network card
driver -- or for some other stuff the error can be created by -- such
that the error disappears.

Thanks in advance!

Lukas

On Tue, 24 Apr 2001, Stephen E. Hargrove wrote:

> On Tue, 24 Apr 2001, Lex McPhail wrote:
> >
> > I had a similar message come up with hdc:
> >
> > hdc: timeout waiting for DMA
> > hdc: irq timeout: status=0x58 { DriveReady SeekComplete DataRequest }
> >
> > Finally worked out that the system had been working fine (no timeouts) prior to
> > me compiling up a firewall enabled kernel.  I initally installed Debian
> > 2.2.18pre21-compact.  Comparing the config- files I found that I had set the
> > option CONFIG_IDEDMA_AUTO to Y in my new kernel.  make menuconfig lists this
> > option under: Block Devices -> Use DMA by default when availble.  Removing this
> > option (ie setting it to N) has fixed my system - havent had the timeout message
> > since.
> 
> i find this very odd, considering that i haven't made any modifications to
> this particular system in several months. however
> 
> hdparm -d 0 /dev/hda
> 
> and the message has stopped appearing.  this particular drive shouldn't
> have been configured to use dma anyway, so disabling dma makes perfect
> sense.
> 
> -- 
> steve
> *****
> linux : http://exitwound.org
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> buck  : http://www.BuckOwensFan.com
> *****
> 
> 
> 
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-- 
Lukas Ruf                        Swiss Federal Institute of Technology
Office: ETZ-G61.2                             Computer Engineering and
Phone: +41/1/632 7312                        Networks Laboratory (TIK)
Fax:   +41/1/632 1035                                      ETH Zentrum
PGP 2.6: ID D20BA2ED;                                    Gloriastr. 35
Fingerprint 6323 B9BC 9C8E 6563  B477 BADD FEA6 E6B7    CH-8092 Zurich



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