Messages in this thread | | | Date | Thu, 2 Jun 2005 14:25:04 -0600 (MDT) | From | Zwane Mwaikambo <> | Subject | Re: [patch 0/5] x86_64 CPU hotplug patch series. |
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On Thu, 2 Jun 2005, Ashok Raj wrote:
> Andrew: Could you help test staging in -mm so we can get some wider testing > from those interested. > > *Sore Point*: Andi doesnt agree with one patch that removes ipi-broadcast > and uses only online map cpus receive IPI's. This is much simpler approach to > handle instead of trying to remove the ill effects of IPI broadcast to CPUs in > offline state. > > Initial concern from Andi was IPI performance, but some primitive test with a > good number of samples doesnt seem to indicate any degration at all, infact the > results seem identical. (Barring any operator errors :-( ). > > It would be nice to hear other opinions as well, hopefuly we can close on > what what the right approach in this case. Link to an earlier discussion > on the topic.
I don't think it's worth the extra boot time complexity to use the boot workaround and i'm not convinced the extra mask against cpu_online_map slows down that path enough to show up compared to waiting for remote processor IPI handling to commence/complete.
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