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Re: [PATCH 15/16] x86: Unify node_to_cpumask_map handling between 32 and 64bit

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From: David Rientjes
Subject: Re: [PATCH 15/16] x86: Unify node_to_cpumask_map handling between 32 and 64bit
Date: Thursday, December 30, 2010 - 11:43 am

On Thu, 30 Dec 2010, Tejun Heo wrote:


There's nothing new about NUMA emulation on x86_64, it's existed for well 
over four years (we've been using it at Google since 2.6.18, see 
Documentation/x86/x86_64/fake-numa-for-cpusets).  Shaohui's patches are 
completely seperate and add hotplug emulation.  You _could_ boot with a 
very minimal amount of memory and then hotplug all the emulated nodes like 
numa=fake does, but you may find it difficult to parse the e820 and 
interleave the nodes appropriately over the set of physical nodes in 
userspace.
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Messages in current thread:
[PATCHSET REPOST] x86: unify x86_32 and 64 NUMA init paths ..., Tejun Heo, (Tue Dec 28, 4:48 am)
[PATCH 01/16] x86: Kill unused static boot_cpu_logical_api ..., Tejun Heo, (Tue Dec 28, 4:48 am)
[PATCH 02/16] x86: Rename x86_32 MAX_APICID to MAX_LOCAL_APIC, Tejun Heo, (Tue Dec 28, 4:48 am)
[PATCH 03/16] x86: Make default_send_IPI_mask_sequence/all ..., Tejun Heo, (Tue Dec 28, 4:48 am)
[PATCH 04/16] x86: Replace cpu_2_logical_apicid[] with ear ..., Tejun Heo, (Tue Dec 28, 4:48 am)
[PATCH 05/16] x86: Always use x86_cpu_to_logical_apicid fo ..., Tejun Heo, (Tue Dec 28, 4:48 am)
[PATCH 06/16] x86: Kill apic->cpu_to_logical_apicid(), Tejun Heo, (Tue Dec 28, 4:48 am)
[PATCH 07/16] x86: Add apic->x86_32_early_logical_apicid(), Tejun Heo, (Tue Dec 28, 4:48 am)
[PATCH 08/16] x86: Implement the default x86_32_early_logi ..., Tejun Heo, (Tue Dec 28, 4:48 am)
[PATCH 09/16] x86: Implement x86_32_early_logical_apicid() ..., Tejun Heo, (Tue Dec 28, 4:48 am)
[PATCH 10/16] x86: Implement x86_32_early_logical_apicid() ..., Tejun Heo, (Tue Dec 28, 4:48 am)
[PATCH 11/16] x86: Implement x86_32_early_logical_apicid() ..., Tejun Heo, (Tue Dec 28, 4:48 am)
[PATCH 12/16] x86: Replace apic->apicid_to_node() with ->x ..., Tejun Heo, (Tue Dec 28, 4:48 am)
[PATCH 13/16] x86: Unify cpu/apicid <-> NUMA node mapping ..., Tejun Heo, (Tue Dec 28, 4:48 am)
[PATCH 14/16] x86: Unify CPU -> NUMA node mapping between ..., Tejun Heo, (Tue Dec 28, 4:48 am)
[PATCH 15/16] x86: Unify node_to_cpumask_map handling betw ..., Tejun Heo, (Tue Dec 28, 4:48 am)
[PATCH 16/16] x86: Unify NUMA initialization between 32 an ..., Tejun Heo, (Tue Dec 28, 4:48 am)
Re: [PATCH 13/16] x86: Unify cpu/apicid <-> NUMA node mapp ..., David Rientjes, (Tue Dec 28, 1:35 pm)
Re: [PATCH 14/16] x86: Unify CPU -> NUMA node mapping betw ..., David Rientjes, (Tue Dec 28, 1:39 pm)
Re: [PATCH 15/16] x86: Unify node_to_cpumask_map handling ..., David Rientjes, (Tue Dec 28, 1:43 pm)
Re: [PATCH 13/16] x86: Unify cpu/apicid <-> NUMA node mapp ..., Tejun Heo, (Wed Dec 29, 3:52 am)
Re: [PATCH 13/16] x86: Unify cpu/apicid <-> NUMA node mapp ..., H. Peter Anvin, (Wed Dec 29, 12:36 pm)
Re: [PATCH 13/16] x86: Unify cpu/apicid <-> NUMA node mapp ..., H. Peter Anvin, (Wed Dec 29, 3:05 pm)
Re: [PATCH 13/16] x86: Unify cpu/apicid <-> NUMA node mapp ..., Tejun Heo, (Thu Dec 30, 4:33 am)
Re: [PATCH 15/16] x86: Unify node_to_cpumask_map handling ..., Tejun Heo, (Thu Dec 30, 5:48 am)
Re: [PATCH 15/16] x86: Unify node_to_cpumask_map handling ..., Tejun Heo, (Thu Dec 30, 7:58 am)
Re: [PATCH 15/16] x86: Unify node_to_cpumask_map handling ..., David Rientjes, (Thu Dec 30, 11:40 am)
Re: [PATCH 15/16] x86: Unify node_to_cpumask_map handling ..., David Rientjes, (Thu Dec 30, 11:43 am)
Re: [PATCH 15/16] x86: Unify node_to_cpumask_map handling ..., Tejun Heo, (Fri Dec 31, 6:20 am)
Re: [PATCH 15/16] x86: Unify node_to_cpumask_map handling ..., David Rientjes, (Fri Dec 31, 4:09 pm)