Messages in this thread | | | Date | Wed, 28 Apr 2004 07:52:55 -0700 | From | Ashok Raj <> | Subject | Re: ia64-cpu-hotplug-cpu_present.patch? |
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On Tue, Apr 27, 2004 at 10:57:41PM -0700, Paul Jackson wrote:
Hi Paul,
sorry for the trouble. I will try to address them, and will try to resolve the compile problem you are having.
> I cannot find any mention of it on lkml or any other email list that > either Google or I track. > > Is there some backdoor path to Andrew's patch directory I don't know of ;)?
I sent the patch to linux-ia64, but forgot to copy lkml. No... i did not buy crispy cream for andrew.. although that did cross my mine :-)
Some of the points you raise, i will look into, but here is a quick summary fo Paul's top 10 list!.
cpu_present is required so that when cpu_up is called in smp_init() we dont call for all possible cpu's but just for cpu's physically present.
cpu_possible - indicates cpu may be available, but may not be present in the system. Hence different from phys_cpu_present_mask
cpu_possible wont change dynamically but present_map can change depending on the arrival of cpu's in a system. I implemented it for only ia64, and expection is that ACPI or its equilvalent would populate cpu_present_map dynamically.
In architectures that dont have cpu_hotplug capability, i have kept cpu_present and possible the same.
Once i take a look at the failures, i will send you an updated patch. again really sorry for the inconvenience.
Cheers, ashok - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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