Messages in this thread | | | Date | Fri, 29 Aug 2008 18:22:16 +0200 | From | Andi Kleen <> | Subject | Re: [PATCH] seqlock: serialize against writers |
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> Im running it on a x86_64 box as we speak. How can I tell if there is a > certain mode that is permitting this?
If the boot up says you're running with PMtimer then it uses the fallback (usually happens on pre Fam10h AMD boxes). A typical Intel box would use the faster ring 3 only TSC path and then explode with your change I bet.
Or step with gdb through gettimeofday() and see if it does a syscall.
-Andi
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