Messages in this thread | | | Date | Sat, 13 Jun 2009 13:25:54 -0700 (PDT) | From | Linus Torvalds <> | Subject | Re: [PATCH 1/2] lib: Provide generic atomic64_t implementation |
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On Sat, 13 Jun 2009, Linus Torvalds wrote: > > On Sat, 13 Jun 2009, Paul Mackerras wrote: > > > > Linus, Andrew: OK if this goes in via the powerpc tree? > > Ok by me.
Btw, do 32-bit architectures really necessarily want 64-bit performance counters?
I realize that 32-bit counters will overflow pretty easily, but I do wonder about the performance impact of doing things like hashed spinlocks for 64-bit counters. Maybe the downsides of 64-bit perf counters on such architectures might outweight the upsides?
Linus
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