From: Tejun Heo <tj@kernel.org>
To: David Rientjes <rientjes@google.com>
Cc: Nishanth Aravamudan <nacc@linux.vnet.ibm.com>,
Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>,
Paul Mackerras <paulus@samba.org>,
Anton Blanchard <anton@samba.org>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [RFC PATCH] powerpc/numa: reset node_possible_map to only node_online_map
Date: Thu, 5 Mar 2015 17:18:07 -0500 [thread overview]
Message-ID: <20150305221807.GH23912@htj.duckdns.org> (raw)
In-Reply-To: <20150305220804.GF23912@htj.duckdns.org>
On Thu, Mar 05, 2015 at 05:08:04PM -0500, Tejun Heo wrote:
> It can be argued that we should always stick to the online masks for
> allocation and iteration; however, that usually requires more
> complexity and the only cases where this mattered have been when the
> boot code got it wrong and failed to set the possible masks correctly,
> which also seems to be the case here. I don't see any reason to
> deviate here.
Hmm... but yeah, as you wrote, keeping the allocation local could be a
reason but let's please not do this just to reduce memory consumption.
If memory locality of the field affects performance noticeably, sure.
Thanks.
--
tejun
next prev parent reply other threads:[~2015-03-05 22:18 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-03-05 18:05 [RFC PATCH] powerpc/numa: reset node_possible_map to only node_online_map Nishanth Aravamudan
2015-03-05 21:16 ` David Rientjes
2015-03-05 21:48 ` Michael Ellerman
2015-03-05 21:58 ` David Rientjes
2015-03-05 22:08 ` Tejun Heo
2015-03-05 22:18 ` Tejun Heo [this message]
2015-03-05 23:21 ` Nishanth Aravamudan
2015-03-05 23:24 ` Tejun Heo
2015-03-05 23:20 ` Nishanth Aravamudan
2015-03-05 23:17 ` Nishanth Aravamudan
2015-03-05 23:15 ` Nishanth Aravamudan
2015-03-05 23:29 ` David Rientjes
2015-03-06 5:27 ` [PATCH v2] powerpc/numa: set node_possible_map to only node_online_map during boot Nishanth Aravamudan
2015-03-06 11:29 ` Raghavendra K T
2015-03-09 23:55 ` Michael Ellerman
2015-03-10 23:50 ` [PATCH v3] " Nishanth Aravamudan
2015-03-05 22:13 ` [RFC PATCH] powerpc/numa: reset node_possible_map to only node_online_map Tejun Heo
2015-03-05 23:27 ` Nishanth Aravamudan
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