Re: [REGRESSION] tcp/ipv4: kernel panic because of (possible) division by zero

Oleksandr Natalenko
2016-01-10T14:57:44Z

Yes, this is my next step. Then I'll try to move from YeAH.

On неділя, 10 січня 2016 р. 09:54:16 EET Neal Cardwell wrote:
> On Sun, Jan 10, 2016 at 9:48 AM, Neal Cardwell <ncardwell@google.com> wrote:
> > On Sun, Jan 10, 2016 at 5:23 AM, Oleksandr Natalenko
> >
> > <oleksandr@natalenko.name> wrote:
> >> With the patch queued for upstream and ECN enabled I get WARN_ON_ONCE()
> >> triggered. Here is the stacktrace:
> >>
> >> https://gist.github.com/89203e77bfcb051f269a
> >>
> >> It seems that tp->prior_cwnd is zero.
> >
> > Hmm. Interesting. Can you please confirm that you are using the cubic
> > congestion control module?
>
> Would you be able to do an experiment where you reboot, and then
> disable ECN upon startup, and then see if the warning still shows up
> without ECN?
>
> thanks,
> neal