Messages in this thread | | | Date | Wed, 27 Oct 2010 16:39:16 +0200 | From | Tejun Heo <> | Subject | Re: [PATCH] x86-32: Allocate irq stacks seperate from percpu area |
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On 10/27/2010 04:24 PM, Eric Dumazet wrote: > Le mercredi 27 octobre 2010 à 16:00 +0200, Tejun Heo a écrit : > >> Heh, interesting table. What does the same code say on 64bit? Is it >> the same? >> > > Yes this is the same
Weird, then why did the percpu code interleaved cpus 16-31 between node 0 and 1? Percpu layout code tries pretty hard to group cpus into percpu units according to NUMA mapping but if the nodes are too unbalanced that doing so would result in too big waste of address space, it gives up. I _think_ that's what happened with the weird 24:8 NUMA split on 32bit. So, the interesting part is cpus 16-31 not 0-15.
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