On Wed, Sep 21, 2016 at 05:33:41PM +0200, gregkh@linuxfoundation.org wrote:
> On Wed, Sep 21, 2016 at 11:23:15PM +0800, Alex Shi wrote:

> > Or which enterprise distro kernel keep rebasing to upstream?

> Both SuSE and Oracle do this for their releases.

There's some other distros out there...

> > Thus base layer software update need long time testing for
> > compatibility and stability.

> Why isn't that happening constantly?  Why wait a few years to do this
> for new versions?  Why is the test frameworks that people have not
> always churning away at this type of thing to find our bugs as soon as
> possible?

We've had plenty of talks at KS from the enterprise vendors about the
challenges with doing detailed performance testing on upstream on a
constant basis, the same issues apply.  It's not a case of waiting years
to start, it's a case of tests that take a very long time or lots of
other resources to perform and often some skill in knowing how to
interpret the results.