Re: [PATCH] config: Enable CONFIG_MODVERSIONS

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On Wed, Nov 30, 2016 at 8:03 PM, Don Zickus <dzickus@xxxxxxxxxx> wrote:

> On Wed, Nov 30, 2016 at 04:25:30PM -0800, Laura Abbott wrote:
> > >  I don't think it would be a bad idea to enable in rawhide and see how
> it works out, from there it will trickle down as the stable releases get
> rebased.  While turning it on in theory shouldn't create a problem. I
> honestly don't get warm fuzzies making such a change without at least some
> time testing in rawhide. We are just a week or two away from 4.9 final now,
> so it isn't a huge delay.  The changes being proposed upstream are not even
> in next yet, so it has some time to be shaken out before it would ever see
> a stable release, though the feature would need to be enabled in rawhide
> for testing as that happens.
> > >
> > > Justin
> > >
> > >
> >
> > I'm not opposed to turning it on but I'm a little bit wary
> > of this causing unexpected problems for users. From
> > experience, how likely is it that a module passes the version
> > checks but something else has changed such that it no longer
> > works? Even if we can't officially support 3rd party modules,
> > I'd like to not make it too much worse within reason.
>
> Hi Laura,
>
> Thanks for the feedback!
>
> That can always be the case, static inlines for example.  But RHEL has been
> relying on this since RHEL-5 with many 3rd party drivers.  Various fixes
> have gone in to the genksyms tool to make this interface fairly reliable.
>

RHEL relying on this without major issues is very different than Fedora
relying on it.  Fedora 23 which will EOL this month released with a 4.2
kernel and is currently using 4.8.10.

Justin
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