Re: [RFC v2 3/6] kthread: warn on kill signal if not OOM

[Dmitry Torokhov]

On Sat, Sep 06, 2014 at 07:31:39AM +0900, Tejun Heo wrote:
> On Sat, Sep 06, 2014 at 07:29:56AM +0900, Tejun Heo wrote:
> > It is for storage devices which always have guaranteed synchronous
> > probing on module load and well-defined probing order.

Agree about probing order (IIRC that is why we had to revert the
wholesale asynchronous probing a few years back) but totally disagree
about synchronous module loading.

Anyway, I just posted a patch that I think preserves module loading
behavior and solves my issue with built-in modules. It does not help
Luis' issue though (but then I think the main problem is with systemd
being stupid there).

> > Sure, modern
> > setups are a lot more dynamic but I'm quite certain that there are
> > setups in the wild which depend on storage driver loading being
> > synchronous.  We can't simply declare one day that such behavior is
> > broken and break, most likely, their boots.
> 
> To add a bit, if the argument here is that dependency on such behavior
> shouldn't exist and module loading and device probing should always be
> asynchronous, the right approach is implementing "synchronous_probing"
> flag not the other way around.  I actually wouldn't hate to see that
> change happening but whoever submits and routes such a change should
> be ready for a major shitstorm, I'm afraid.

I think we already had this storm and that is why here we have opt-in
behavior for the drivers.

Thanks.

-- 
Dmitry
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