On Fri, 29 Jul 2005, Robert Watson wrote:
On Fri, 29 Jul 2005, Alexander S. Usov wrote:
I got a few similar panics.
It looks that I managet to get rid of them by setting mpsafenet=0, but I
am not sure -- I have to monitor it for a bit longer.
I have managed to get a few dumps, so the traces are:
Unfortunately I don't have these dumps anymore, I will try to switch
mpsafenet back on and wait for a new ones. They were quite reproducable for
me.
Thanks. I will be away this weekend, but hope to have a chance to look
into this early next week. If you could send me the dmesg of the box
also, and the output of "sysctl -a", that would be helpful. Probably
out of band rather than via the list (or if you could put it on a web
page I could reach).
Two quetions:
- Is there substantial IPv6 traffic on this system? I've had at least one
report that this panic happens on a system only in the context of IPv6.
- Is it possible for you to try running with a latest 5-STABLE kernel?
Mohan at Yahoo!, who did the TCP SACK work, has been investigating the
problem but has been unable to reproduce it either. Fortunately, it
sounds like Geore Neville-Neil is able to reprodeuce it in a test
environment, albeit only with IPv6, so we'll see what we can do. Mohan
may shortly have a diagnostic patch to run with.
Thanks,
Robert N M Watson
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