Messages in this thread |  | | Subject | Re: Calling current() from interrupt context | Date | Mon, 9 Oct 2000 23:52:56 +0100 (BST) | From | Alan Cox <> |
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> > I dont actually know a CPU that doesnt have one in SMP mode. Its just often > > behind an I/O interface that is slower than ideal > > Where would you put it for IA32 ? I don't know any free MSR that could > be abused for that, and acessing MSRs is insanely slow anyways. Any > other ideas ?
The CPU identifier is in the APIC in SMP IA32. 2.0 reads it off the APIC each time. Its a few cycles so the 2.2 approach is nicer
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