Messages in this thread | | | Date | Thu, 18 Aug 2005 23:32:37 +0200 | From | Andi Kleen <> | Subject | Re: [Lse-tech] Re: idle task's task_t allocation on NUMA machines |
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On Thu, Aug 18, 2005 at 10:02:55PM +0200, Samuel Thibault wrote: > Samuel Thibault, le Thu 18 Aug 2005 21:49:41 +0200, a ?crit : > > Eric Dumazet, le Thu 18 Aug 2005 17:18:55 +0200, a ?crit : > > > I believe IRQ stacks are also allocated on node 0, that seems more serious. > > > > For the i386 architecture at least, yes: they are statically defined in > > arch/i386/kernel/irq.c, while they could be per_cpu. > > Hum, but the per_cpu areas for i386 are not numa-aware... I'm wondering: > isn't the current x86_64 numa-aware implementation of per_cpu generic > enough for any architecture?
Actually it's broken for many x86-64 configurations now that use SRAT because we assign the nodes to CPUs only after this code runs. I was considering to remove it.
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