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

From: Borislav Petkov
Date: Tue Jun 23 2015 - 07:09:10 EST

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 :)



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