On Friday 09 September 2005 20:01, you wrote:
> On Fri, 9 Sep 2005 19:38:17 +0200
>
> Bernd Schubert <bernd.schubert@xxxxxxxxxxxxxxxxxxxxx> wrote:
> > Hello,
> >
> > today we tried 2.6.13 on our server and also tried to use the skge
> > driver. Well, in principle it works fine, until I became curious about
> > the sysfs values. Stupid me, I was using the midnight commander to read
> > the values. When I opened
> > "/sys/bus/pci/drivers/skge/0000:01:01.0/resource0", the system
> > immediately rebooted. After the reboot we tested using cat to the
> > resource0 file, which gave an input/output error. Using again the mc, the
> > system again immediately rebooted.
> > Well, I guess I better don't use the midnight commander in the future,
> > but somehow I think it shouldn't cause the system to reboot, should it?
> > Is the i/o error of cat supposed to happen?
>
> Don't do that! resource0 is the pci space for the card and
> reading it directly accesses the memory mapped space. The
> register is sparse, and some places are unaccessable.
> Accessing non-existent memory will cause system to hang and if you
> are lucky a timeout and reboot.
>
> Sorry, this is not a driver bug.
Thanks, I better also won't read the resource values of the other pci-devices.
And I think I will search for some documentation of sysfs to know in the
future which values one should read and which not.
Thanks again,
Bernd
--
Bernd Schubert
Physikalisch Chemisches Institut / Theoretische Chemie
Universität Heidelberg
INF 229
69120 Heidelberg
e-mail: bernd.schubert@xxxxxxxxxxxxxxxxxxxxx
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