Messages in this thread | | | Date | Thu, 10 Jul 2008 14:01:46 -0400 | From | "H. Peter Anvin" <> | Subject | Re: [RFC 00/15] x86_64: Optimize percpu accesses |
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Mike Travis wrote: > > The discussion that followed was very emphatic that the size of the space should > not be fixed, but instead be dynamically growable. Since the offset needs to be > fixed for each cpu, then virtual (I think) is the only way to go. The use of a > 2MB page just conserves map entries. (Of course, if we just reserved 2MB in the > first place it might not need to be virtual...? But the concern was for systems > with hundreds of (say) network interfaces using even more than 2MB.) >
I'm much more concerned about wasting an average of 1 MB of memory per CPU.
-hpa
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