From: Yinghai Lu <yinghai@kernel.org>
To: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
linux-kernel@vger.kernel.org, mingo@redhat.com, hpa@zytor.com,
x86@kernel.org, eric.dumazet@gmail.com, brgerst@gmail.com,
gorcunov@gmail.com, penberg@kernel.org
Subject: Re: [PATCH 13/16] x86: Unify cpu/apicid <-> NUMA node mapping between 32 and 64bit
Date: Fri, 10 Dec 2010 13:17:04 -0800 [thread overview]
Message-ID: <4D0298D0.20303@kernel.org> (raw)
In-Reply-To: <4D029389.1050402@kernel.org>
On 12/10/2010 12:54 PM, Tejun Heo wrote:
> On 12/10/2010 09:45 PM, Tejun Heo wrote:
>> I can change srat_detect_node() and nearby_node() to index by cpu but
>> as I have no idea what kind of broken configurations this is supposed
>> to deal with, I'm concerned that this may lead to different outcome by
>> walking the table in a different order. I can implement an apicid ->
>> numa node mapping function for this but this is something which is
>> inherently ugly, so maybe it's best to leave it ugly.
>
> Oh, right, another problem. It's possible that apicid <-> numa
> mapping exists when apicid <-> cpu doesn't. Again, this is a corner
> case which might not matter but I have no idea what kind of brokeness
> is being worked around and it would also be difficult to test whether
> the change is okay.
>
that could happen...when SRAT and MADT is in different order. and your are booting nr_cpus=<less....> in SRAT...
should be fixed in
https://lkml.org/lkml/2010/11/22/5
Thanks
Yinghai
next prev parent reply other threads:[~2010-12-10 21:19 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-11-27 15:21 [PATCHSET] x86: unify x86_32 and 64 NUMA init paths, take#2 Tejun Heo
2010-11-27 15:21 ` [PATCH 01/16] x86: Kill unused static boot_cpu_logical_apicid in smpboot.c Tejun Heo
2010-11-27 15:21 ` [PATCH 02/16] x86: Rename x86_32 MAX_APICID to MAX_LOCAL_APIC Tejun Heo
2010-11-27 15:21 ` [PATCH 03/16] x86: Make default_send_IPI_mask_sequence/allbutself_logical() 32bit only Tejun Heo
2010-11-27 15:21 ` [PATCH 04/16] x86: Use local variable to cache smp_processor_id() in setup_local_APIC() Tejun Heo
2010-11-27 21:32 ` Cyrill Gorcunov
2010-11-30 16:17 ` [PATCH UPDATED " Tejun Heo
2010-11-30 18:11 ` [PATCH UPDATED#2 " Tejun Heo
2010-11-30 18:22 ` Cyrill Gorcunov
2010-11-30 19:42 ` Tejun Heo
2010-11-30 20:52 ` Cyrill Gorcunov
2010-12-09 9:37 ` Pekka Enberg
2010-12-09 10:47 ` [PATCH UPDATED#3 04/16] x86: setup_local_APIC() must always be called with preemption disabled Tejun Heo
2010-12-09 16:17 ` Cyrill Gorcunov
2010-12-09 16:18 ` Pekka Enberg
2010-12-09 21:56 ` Thomas Gleixner
2010-12-10 11:09 ` Tejun Heo
2010-12-10 11:10 ` Thomas Gleixner
2010-12-10 12:48 ` [tip:x86/apic-cleanups] x86: apic: Cleanup and simplify setup_local_APIC() tip-bot for Tejun Heo
2010-11-27 15:21 ` [PATCH 05/16] x86: Replace cpu_2_logical_apicid[] with early percpu variable Tejun Heo
2010-11-27 15:21 ` [PATCH 06/16] x86: Always use x86_cpu_to_logical_apicid for cpu -> logical apic id Tejun Heo
2010-11-27 15:21 ` [PATCH 07/16] x86: Remove custom apic->cpu_to_logical_apicid() implementations Tejun Heo
2010-12-09 21:28 ` Thomas Gleixner
2010-12-10 11:12 ` Tejun Heo
2010-12-10 11:18 ` Thomas Gleixner
2010-11-27 15:21 ` [PATCH 08/16] x86: Use apic->cpu_to_logical_apicid() to find out logical apic id mapping early during boot Tejun Heo
2010-11-27 15:21 ` [PATCH 09/16] x86: Implement cpu_to_logical_apicid() for bigsmp_32 Tejun Heo
2010-11-27 15:21 ` [PATCH 10/16] x86: Implement cpu_to_logical_apicid() for summit_32 Tejun Heo
2010-11-27 15:22 ` [PATCH 11/16] x86: Implement cpu_to_logical_apicid() for numaq_32 Tejun Heo
2010-11-27 15:22 ` [PATCH 12/16] x86: Replace apic->apicid_to_node() with ->numa_cpu_node() Tejun Heo
2010-11-27 15:22 ` [PATCH 13/16] x86: Unify cpu/apicid <-> NUMA node mapping between 32 and 64bit Tejun Heo
2010-12-09 21:43 ` Thomas Gleixner
2010-12-10 20:45 ` Tejun Heo
2010-12-10 20:54 ` Tejun Heo
2010-12-10 21:17 ` Yinghai Lu [this message]
2010-11-27 15:22 ` [PATCH 14/16] x86: Unify CPU -> " Tejun Heo
2010-12-09 21:49 ` Thomas Gleixner
2010-12-10 11:13 ` Tejun Heo
2010-11-27 15:22 ` [PATCH 15/16] x86: Unify node_to_cpumask_map handling " Tejun Heo
2010-11-27 15:22 ` [PATCH 16/16] x86: Unify NUMA initialization " Tejun Heo
2010-12-07 16:22 ` [PATCHSET] x86: unify x86_32 and 64 NUMA init paths, take#2 Tejun Heo
-- strict thread matches above, loose matches on Subject: below --
2010-12-28 11:48 [PATCHSET REPOST] x86: unify x86_32 and 64 NUMA init paths, take#3 Tejun Heo
2010-12-28 11:48 ` [PATCH 13/16] x86: Unify cpu/apicid <-> NUMA node mapping between 32 and 64bit Tejun Heo
2010-12-28 20:35 ` David Rientjes
2010-12-29 10:52 ` Tejun Heo
2010-12-29 19:36 ` H. Peter Anvin
2010-12-29 22:05 ` H. Peter Anvin
2010-12-30 11:33 ` Tejun Heo
2010-12-30 17:49 [PATCHSET] x86: unify x86_32 and 64 NUMA init paths, take#4 Tejun Heo
2010-12-30 17:49 ` [PATCH 13/16] x86: Unify cpu/apicid <-> NUMA node mapping between 32 and 64bit Tejun Heo
2011-01-23 13:37 [PATCHSET] x86: unify x86_32 and 64 NUMA init paths, take#5 Tejun Heo
2011-01-23 13:37 ` [PATCH 13/16] x86: Unify cpu/apicid <-> NUMA node mapping between 32 and 64bit Tejun Heo
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