Messages in this thread | | | Subject | Re: [PATCH 08/13] xen/pvticketlock: disable interrupts while blocking | From | Peter Zijlstra <> | Date | Fri, 02 Sep 2011 22:47:48 +0200 |
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On Fri, 2011-09-02 at 12:29 -0700, Jeremy Fitzhardinge wrote: > > > I know that its generally considered bad form, but there's at least one > > spinlock that's only taken from NMI context and thus hasn't got any > > deadlock potential. > > Which one?
arch/x86/kernel/traps.c:nmi_reason_lock
It serializes NMI access to the NMI reason port across CPUs.
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