Messages in this thread |  | | | Date | Wed, 23 Feb 2011 12:15:34 -0800 | | From | "Paul E. McKenney" <> | | Subject | Re: [PATCH RFC tip/core/rcu 11/11] rcu: move TREE_RCU from softirq to kthread |
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On Wed, Feb 23, 2011 at 08:23:50PM +0100, Peter Zijlstra wrote: > On Wed, 2011-02-23 at 13:19 -0600, Christoph Lameter wrote: > > > this_cpu_inc is already percpu atomic. On x86 it is an instruction that > > cannot be interrupted nor preempted while in progress. > > On x86, yes, but is this true for all architectures? I guess the > fallback is implemented with local_irq_disable() which might be good > enough for some but not for NMI usage.
Good point! Thankfully, no worries about NMI usage in this piece of code. ;-)
Thanx, Paul
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