Re: [PATCH v2 03/14] notifiers: Assert that RCU is watching in notify_die

[Borislav Petkov]

On Tue, Jun 23, 2015 at 10:56:24AM +0200, Ingo Molnar wrote:
> So I think the theory is that crashes do happen, and that any RCU warning only 
> matters to (usually) small race windows.
> 
> So by the time a difficult crash truly happens, exactly in that race window, we'd 
> have fixed the RCU warning long ago.
> 
> I.e. the placement of the RCU warning isn't really relevant in the long run, as it 
> should not trigger.
> 
> In the short run it's probably more important to have it first, because if we have 
> that RCU race then we don't know whether we can trust anything that happens after 
> executing the (flawed) notifier chain.
> 
> Does that logic make sense to you?

Yap, it does actually. Nice :)

Thanks!

-- 
Regards/Gruss,
    Boris.

ECO tip #101: Trim your mails when you reply.
--
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/