Thread (8 messages) 8 messages, 3 authors, 2017-11-01

Re: [Patch net 00/16] net_sched: fix races with RCU callbacks

From: Cong Wang <hidden>
Date: 2017-10-31 22:10:19

Possibly related (same subject, not in this thread)

On Tue, Oct 31, 2017 at 12:13 PM, Lucas Bates [off-list ref] wrote:
On Tue, Oct 31, 2017 at 2:55 PM, Lucas Bates [off-list ref] wrote:
quoted
Unfortunately it doesn't seem to have had any effect, I'm still seeing
the same bug as yesterday. At Jamal's suggestion I put in a delay
As I replied to you privately, it is probably because idrinfo is freed
before action itself. So just RTNL is not enough.

quoted
after tdc completed running the tests but before it deleted the
container - and I didn't run into the bug after many runs. I had no
luck getting serial console access on any of our other systems so I
have another stack trace photo which I'll send to you directly.
I forgot to mention: it appears the bug appears to be related to
deleting the container. Test d052 is the last to run before tdc does
its teardown and deletes the container; if I add the sleep the bug
never gets triggered.
This almost rules out the guilty of this patchset.

I will provide a patch for you to test, since I can't reproduce it here.

Thanks!
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