From: Michael Ellerman <mpe@ellerman.id.au>
To: Zhen Lei <thunder.leizhen@huawei.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-api <linux-api@vger.kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Michal Hocko <mhocko@suse.com>, linux-mm <linux-mm@kvack.org>
Cc: Tianhong Ding <dingtianhong@huawei.com>,
Hanjun Guo <guohanjun@huawei.com>,
Libin <huawei.libin@huawei.com>,
Kefeng Wang <wangkefeng.wang@huawei.com>,
Zhen Lei <thunder.leizhen@huawei.com>
Subject: Re: [PATCH v2 1/1] mm: only dispaly online cpus of the numa node
Date: Tue, 03 Oct 2017 12:22:44 +1100 [thread overview]
Message-ID: <8760bxdnyz.fsf@concordia.ellerman.id.au> (raw)
In-Reply-To: <1506678805-15392-2-git-send-email-thunder.leizhen@huawei.com>
Zhen Lei <thunder.leizhen@huawei.com> writes:
> When I executed numactl -H(which read /sys/devices/system/node/nodeX/cpumap
> and display cpumask_of_node for each node), but I got different result on
> X86 and arm64. For each numa node, the former only displayed online CPUs,
> and the latter displayed all possible CPUs. Unfortunately, both Linux
> documentation and numactl manual have not described it clear.
FWIW powerpc happens to implement the x86 behaviour, online CPUs only.
cheers
WARNING: multiple messages have this Message-ID (diff)
From: Michael Ellerman <mpe-Gsx/Oe8HsFggBc27wqDAHg@public.gmane.org>
To: Catalin Marinas <catalin.marinas-5wv7dgnIgG8@public.gmane.org>,
Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>,
linux-kernel
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
linux-api <linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Greg Kroah-Hartman
<gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>,
Michal Hocko <mhocko-IBi9RG/b67k@public.gmane.org>,
linux-mm <linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org>
Cc: Tianhong Ding
<dingtianhong-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>,
Hanjun Guo <guohanjun-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>,
Libin <huawei.libin-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>,
Kefeng Wang
<wangkefeng.wang-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>,
Zhen Lei
<thunder.leizhen-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
Subject: Re: [PATCH v2 1/1] mm: only dispaly online cpus of the numa node
Date: Tue, 03 Oct 2017 12:22:44 +1100 [thread overview]
Message-ID: <8760bxdnyz.fsf@concordia.ellerman.id.au> (raw)
In-Reply-To: <1506678805-15392-2-git-send-email-thunder.leizhen-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
Zhen Lei <thunder.leizhen-hv44wF8Li93QT0dZR+AlfA@public.gmane.org> writes:
> When I executed numactl -H(which read /sys/devices/system/node/nodeX/cpumap
> and display cpumask_of_node for each node), but I got different result on
> X86 and arm64. For each numa node, the former only displayed online CPUs,
> and the latter displayed all possible CPUs. Unfortunately, both Linux
> documentation and numactl manual have not described it clear.
FWIW powerpc happens to implement the x86 behaviour, online CPUs only.
cheers
WARNING: multiple messages have this Message-ID (diff)
From: Michael Ellerman <mpe@ellerman.id.au>
To: Zhen Lei <thunder.leizhen@huawei.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
linux-api <linux-api@vger.kernel.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Michal Hocko <mhocko@suse.com>, linux-mm <linux-mm@kvack.org>
Cc: Tianhong Ding <dingtianhong@huawei.com>,
Hanjun Guo <guohanjun@huawei.com>,
Libin <huawei.libin@huawei.com>,
Kefeng Wang <wangkefeng.wang@huawei.com>
Subject: Re: [PATCH v2 1/1] mm: only dispaly online cpus of the numa node
Date: Tue, 03 Oct 2017 12:22:44 +1100 [thread overview]
Message-ID: <8760bxdnyz.fsf@concordia.ellerman.id.au> (raw)
In-Reply-To: <1506678805-15392-2-git-send-email-thunder.leizhen@huawei.com>
Zhen Lei <thunder.leizhen@huawei.com> writes:
> When I executed numactl -H(which read /sys/devices/system/node/nodeX/cpumap
> and display cpumask_of_node for each node), but I got different result on
> X86 and arm64. For each numa node, the former only displayed online CPUs,
> and the latter displayed all possible CPUs. Unfortunately, both Linux
> documentation and numactl manual have not described it clear.
FWIW powerpc happens to implement the x86 behaviour, online CPUs only.
cheers
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next prev parent reply other threads:[~2017-10-03 1:22 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-29 9:53 [PATCH v2 0/1] mm: only dispaly online cpus of the numa node Zhen Lei
2017-09-29 9:53 ` Zhen Lei
2017-09-29 9:53 ` [PATCH v2 1/1] " Zhen Lei
2017-09-29 9:53 ` Zhen Lei
2017-10-02 10:38 ` Will Deacon
2017-10-02 10:38 ` Will Deacon
2017-10-02 21:54 ` Andrew Morton
2017-10-02 21:54 ` Andrew Morton
2017-10-03 13:47 ` Will Deacon
2017-10-03 13:47 ` Will Deacon
2017-10-03 13:56 ` Michal Hocko
2017-10-03 13:56 ` Michal Hocko
2017-10-09 6:06 ` Leizhen (ThunderTown)
2017-10-09 6:06 ` Leizhen (ThunderTown)
2017-10-03 1:22 ` Michael Ellerman [this message]
2017-10-03 1:22 ` Michael Ellerman
2017-10-03 1:22 ` Michael Ellerman
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