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* [PATCH] Define vsyscall cache as blob to make clearer that user space ↵Andi Kleen2006-09-301-5/+7
| | | | | | shouldn't use it Signed-off-by: Andi Kleen <ak@suse.de>
* [PATCH] Add the vgetcpu vsyscallVojtech Pavlik2006-09-261-0/+16
This patch adds a vgetcpu vsyscall, which depending on the CPU RDTSCP capability uses either the RDTSCP or CPUID to obtain a CPU and node numbers and pass them to the program. AK: Lots of changes over Vojtech's original code: Better prototype for vgetcpu() It's better to pass the cpu / node numbers as separate arguments to avoid mistakes when going from SMP to NUMA. Also add a fast time stamp based cache using a user supplied argument to speed things more up. Use fast method from Chuck Ebbert to retrieve node/cpu from GDT limit instead of CPUID Made sure RDTSCP init is always executed after node is known. Drop printk Signed-off-by: Vojtech Pavlik <vojtech@suse.cz> Signed-off-by: Andi Kleen <ak@suse.de>