[PATCH] nve(4) locking cleanup
Matthew Dillon
dillon at apollo.backplane.com
Thu Nov 17 10:59:00 PST 2005
A side note on the work I did on nv (nve) for DragonFly.
I spent a very, very long time trying to fix the watchdog problems. I
was able to greatly reduce instances of the watchdog timeout, but it
still occurs under heavy load.
Even worse, I can wedge the hardware to the point where a reboot or
soft power-down does not fix the problem! I have to physically unplug
the power cable from the box to make the device work again. It only
takes ~30 min - 3 hours of testing to get the ethernet into this
hardware-wedged state.
At this point I believe that the remaining problems are entirely within
Nvidia's nvnet object module. I don't think there is anything we can do
about it short of NVidia coming out with an update (which isn't likely).
Now, linux *has* a native implementation of this driver that does not
use the Nvidia module, and I have gotten reports that it does not suffer
from the same problems.
I think the only way to solve the watchdog problems that nv (nve) has
is to throw it in the trash and do a fresh port from the native driver
in the linux tree.
-Matt
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