Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
>
> Simon Graham explained an interesting effect when using scatter gather
> and DRBD and xen...
That seems to be this thread:
http://www.gossamer-threads.com/lists/drbd/users/16962
unfortunately, in that case, Valentin apparently reported good results with
protocol C and this tweak:
ethtool -K xenbr0 sg off
I can't get that. Even when using
for if in eth0 peth0 virbr0 xenbr0 ; do
ethtool -K $if rx off tx off sg off
done
I DO seem to get a slightly more stable config... in
fact, it sometimes seems to be stable until I bring the secondary back
online, at which point I get a crash that looks _very_ similar to the
initial one.
But, using protocol A is robust... (but slow?).
hhmm, yes. I just managed to crash the box during a resync
(proto C). I have the trace for that too if it is relevent.
(drbd.take4)
hhmm, I'm not convinced this test config is at all stable under
protocol C. I wanted to do a speed test, but can't keep it alive long
enough :(
Anyhow, I need to put this down for now, I'm seriously in need of some
exercise.
-Tom