Re: Divide error in bictcp_cong_avoid ?

[TB]

On 11-05-04 02:35 PM, Randy Dunlap wrote:
> On Wed, 4 May 2011 11:33:51 -0700 Stephen Hemminger wrote:
>
> > On Wed, 4 May 2011 10:49:40 -0700
> > Randy Dunlap<rdunlap@xxxxxxxxxxxx>  wrote:
> >
> > > [add cc to netdev]
> > >
> > >
> > > On Wed, 04 May 2011 12:03:31 -0400 TB wrote:
> > >
> > > > We're having this issue sporadically on a few servers and this is the
> > > > backtrace we get from netconsole.
> > > >
> > > >
> > > > [28522.642419] divide error: 0000 [#1] SMP
> > > > [28522.642457] last sysfs file:
> > > > /sys/devices/pci0000:00/0000:00:1f.2/host2/target2:0:0/2:0:0:0/vendor
> > > > [28522.642504] CPU 0
> > > > [28522.642511] Modules linked in:
> > > >    i2c_i801
> > > >    i2c_core
> > > >    evdev
> > > >    button
> > > > [28522.642570]
> > > > [28522.642590] Pid: 0, comm: swapper Not tainted 2.6.38.5 #6<<<<<<<<<<<<<<
> > > >
> > > >    Supermicro X8DTH-i/6/iF/6F
> > > > /
> > > >    X8DTH
> >
> > What kernel version? I suspect they are running something really old
> > kernel like RHEL 5 since BIC has not been the default congestion control for
> > several years.
>
> Please see about 6 lines above.... at the "<<<<<<<<<<<".

/proc/sys/net/ipv4/tcp_available_congestion_control
cubic reno

cat /proc/sys/net/ipv4/tcp_congestion_control
cubic

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