From: Brice Goglin <Brice.Goglin@inria.fr>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Boqun Feng <boqun.feng@linux.vnet.ibm.com>,
Srikar Dronamraju <srikar@linux.vnet.ibm.com>,
Nishanth Aravamudan <nacc@linux.vnet.ibm.com>,
linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
Anton Blanchard <anton@samba.org>,
linuxppc-dev@lists.ozlabs.org,
Anshuman Khandual <khandual@linux.vnet.ibm.com>
Subject: Re: Topology updates and NUMA-level sched domains
Date: Wed, 08 Apr 2015 12:32:01 +0200 [thread overview]
Message-ID: <552503A1.3050502@inria.fr> (raw)
In-Reply-To: <20150407194129.GT23123@twins.programming.kicks-ass.net>
Le 07/04/2015 21:41, Peter Zijlstra a écrit :
> No, that's very much not the same. Even if it were dealing with hotplug
> it would still assume the cpu to return to the same node.
>
> But mostly people do not even bother to handle hotplug.
>
You said userspace assumes the cpu<->node relation is a boot-time fixed
one, and hotplug breaks this. How do you expect userspace to handle
hotplug? Is there a convenient way to be notified when a CPU (or memory)
is unplugged?
thanks
Brice
next prev parent reply other threads:[~2015-04-08 10:42 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-06 21:45 Topology updates and NUMA-level sched domains Nishanth Aravamudan
2015-04-07 10:21 ` Peter Zijlstra
2015-04-07 17:14 ` Nishanth Aravamudan
2015-04-07 19:41 ` Peter Zijlstra
2015-04-08 10:32 ` Brice Goglin [this message]
2015-04-08 10:52 ` Peter Zijlstra
2015-04-09 22:40 ` Nishanth Aravamudan
2015-04-09 22:37 ` Nishanth Aravamudan
2015-04-09 22:29 ` Nishanth Aravamudan
2015-04-10 8:31 ` Peter Zijlstra
2015-04-10 9:08 ` Peter Zijlstra
2015-04-10 19:50 ` Nishanth Aravamudan
2015-04-10 20:30 ` Nishanth Aravamudan
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