Messages in this thread | | | Date | Wed, 21 May 2014 23:50:49 +0200 (CEST) | From | Jiri Kosina <> | Subject | Re: [RFC] x86_64: A real proposal for iret-less return to kernel |
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On Wed, 21 May 2014, H. Peter Anvin wrote:
> > I certainly like this way of handling it. We can even issue a nice > > banner saying something like "You're f*cked - go change hw." > > Actually, it would be a lot better to panic than deadlock (HA systems > tend to have something in place to catch the panic and/or reboot). Any > way we can see if the CPU is already holding that lock and panic in that > case?
Well, spin_trylock() and then either spin_unlock() and proceed sending the signal, otherwise panic().
-- Jiri Kosina SUSE Labs
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