Oops on i686, 4.2.0-0.rc8, was: Summary/Minutes from...

[Richard W.M. Jones]

On Sun, Aug 30, 2015 at 01:07:36PM -0600, Chris Murphy wrote:
> On Sun, Aug 30, 2015 at 12:39 PM, Richard W.M. Jones <rjones at redhat.com> wrote:
> > https://bugzilla.redhat.com/show_bug.cgi?id=1258223
> 
> I have i686 hardware (ancient Dell laptop) running
> 4.2.0-0.rc8.git0.1.fc23.i686 for over 24 hours with some heavy btrfs +
> rsync stuff, and no oopses. What would I need to run to try to
> reproduce? And is there a meaningful difference this is an fc23
> kernel, not fc24?

It happens during the first second of boot, and seems to happen inside
the 8250 serial driver, so unless you're repeatedly booting the laptop
and it is attached to a serial console you wouldn't see this.

To try reproducing it, this is probably the easiest way:

# yum install libguestfs

$ export LIBGUESTFS_BACKEND=direct
$ while libguestfs-test-tool >/tmp/log 2>&1; do echo -n .; done

After (possibly many many) 100s of iterations, it may exit and you can
examine the log file (/tmp/log) to see if the failure was this bug or
some other thing.

It may (or may not) help to have some other source of load on the
laptop at the same time.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
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