From: Tang Chen <tangchen@cn.fujitsu.com>
To: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
linux-kernel@vger.kernel.org, x86@kernel.org,
linux-numa@vger.kernel.org, wency@cn.fujitsu.com,
mingo@kernel.org, Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH] Update sched_domains_numa_masks when new cpus are onlined.
Date: Tue, 25 Sep 2012 10:39:40 +0800 [thread overview]
Message-ID: <5061196C.8090702@cn.fujitsu.com> (raw)
In-Reply-To: <50602E75.1010304@linux.vnet.ibm.com>
On 09/24/2012 05:57 PM, Srivatsa S. Bhat wrote:
> On 09/24/2012 03:08 PM, Peter Zijlstra wrote:
>>> + hotcpu_notifier(sched_domains_numa_masks_update, CPU_PRI_SCHED_ACTIVE);
>>> hotcpu_notifier(cpuset_cpu_active, CPU_PRI_CPUSET_ACTIVE);
>>> hotcpu_notifier(cpuset_cpu_inactive, CPU_PRI_CPUSET_INACTIVE);
>>
>> OK, so you really want your notifier to run before cpuset_cpu_active
>> because otherwise you get that crash, yet you fail with the whole order
>> thing.. You should not _ever_ rely on registration order.
>>
>
> IMHO he isn't relying on registration order.. He uses the CPU_PRI_SCHED_ACTIVE
> priority to ensure that the ordering of callbacks is right, isn't it?
Yes, that's right. Thanks. :)
>
> Regards,
> Srivatsa S. Bhat
>
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next prev parent reply other threads:[~2012-09-25 2:39 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-18 10:12 [PATCH] Update sched_domains_numa_masks when new cpus are onlined Tang Chen
2012-09-24 5:52 ` Tang Chen
2012-09-24 9:38 ` Peter Zijlstra
2012-09-24 9:57 ` Srivatsa S. Bhat
2012-09-24 10:12 ` Peter Zijlstra
2012-09-24 10:17 ` Srivatsa S. Bhat
2012-09-25 2:39 ` Tang Chen [this message]
2012-09-25 2:39 ` Tang Chen
2012-09-25 10:33 ` Peter Zijlstra
2012-09-25 11:45 ` Tang Chen
2012-09-25 11:50 ` Peter Zijlstra
2012-09-25 12:02 ` Tang Chen
2012-09-25 11:07 ` Peter Zijlstra
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