Re: [PATCH] An RCU for SMP with a single CPU garbage collector

[Joe Korty]

On Mon, Mar 07, 2011 at 04:16:13PM -0500, Joe Korty wrote:
> On Mon, Mar 07, 2011 at 04:01:57PM -0500, Paul E. McKenney wrote:
>> But I would really prefer leveraging the existing RCU implementations
>> to the extent possible.  Are the user-dedicated CPUs able to invoke
>> system calls?  If so, something like Frederic's approach should permit
>> the existing RCU implementations to operate normally.  If not, what is
>> doing the RCU read-side critical sections on the dedicated CPUs?
> 
> I thought about the system call approach but rejected it.
> Some (maybe many) customers needing dedicated CPUs will
> have apps that never make any system calls at all.

Hi Paul,
Thinking about it some more, the tap-into-syscall approach might
work in my implementation, in which case the tap-into-preempt-enable
code could go away.

Nice thing about RCU, the algorithms are infinitely mallable :)

Joe
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