From: Lin Feng <linfeng@cn.fujitsu.com>
To: Will Deacon <will.deacon@arm.com>
Cc: "akpm@linux-foundation.org" <akpm@linux-foundation.org>,
"cl@linux.com" <cl@linux.com>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"mingo@redhat.com" <mingo@redhat.com>,
"hpa@zytor.com" <hpa@zytor.com>,
"yinghai@kernel.org" <yinghai@kernel.org>,
Catalin Marinas <Catalin.Marinas@arm.com>,
"arnd@arndb.de" <arnd@arndb.de>,
"tony@atomide.com" <tony@atomide.com>,
"ben@decadent.org.uk" <ben@decadent.org.uk>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"x86@kernel.org" <x86@kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"isimatu.yasuaki@jp.fujitsu.com" <isimatu.yasuaki@jp.fujitsu.com>
Subject: Re: [PATCH 2/2] mm: vmemmap: arm64: add vmemmap_verify check for hot-add node case
Date: Tue, 09 Apr 2013 10:07:11 +0800 [thread overview]
Message-ID: <516377CF.2080004@cn.fujitsu.com> (raw)
In-Reply-To: <20130408105556.GB17476@mudshark.cambridge.arm.com>
Hi will,
On 04/08/2013 06:55 PM, Will Deacon wrote:
> Given that we don't have NUMA support or memory-hotplug on arm64 yet, I'm
> not sure that this change makes much sense at the moment. early_pfn_to_nid
> will always return 0 and we only ever have one node.
>
> To be honest, I'm not sure what that vmemmap_verify check is trying to
> achieve anyway. ia64 does some funky node affinity initialisation early on
> but, for the rest of us, it looks like we always just check the distance
> from node 0.
Sorry for my noise to arm people.
Yes, not everyone cares about vmemmap_verify(), as you described it's not
necessary to arm64 at all.
thanks,
linfeng
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next prev parent reply other threads:[~2013-04-09 2:05 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-08 9:56 [PATCH 0/2] mm: vmemmap: add vmemmap_verify check for hot-add node/memory case Lin Feng
2013-04-08 9:56 ` [PATCH 1/2] mm: vmemmap: x86: add vmemmap_verify check for hot-add node case Lin Feng
2013-04-08 10:23 ` Lin Feng
2013-04-08 9:56 ` [PATCH 2/2] mm: vmemmap: arm64: " Lin Feng
2013-04-08 10:55 ` Will Deacon
2013-04-09 2:07 ` Lin Feng [this message]
2013-04-08 18:40 ` [PATCH 0/2] mm: vmemmap: add vmemmap_verify check for hot-add node/memory case Yinghai Lu
2013-04-08 20:55 ` Andrew Morton
2013-04-09 1:58 ` Lin Feng
2013-04-09 2:02 ` Lin Feng
2013-04-11 7:41 ` Tang Chen
2013-04-11 15:10 ` Yinghai Lu
2013-04-12 1:13 ` Tang Chen
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