linux-kernel - Re: [PATCH 1/2] arm64: avoid alloc memory on offline node

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Message-ID: <20180612152057.GA13364@dhcp22.suse.cz>
Date:   Tue, 12 Jun 2018 17:20:57 +0200
From:   Michal Hocko <mhocko@...nel.org>
To:     Punit Agrawal <punit.agrawal@....com>
Cc:     Bjorn Helgaas <helgaas@...nel.org>,
        Xie XiuQi <xiexiuqi@...wei.com>,
        Hanjun Guo <guohanjun@...wei.com>, tnowicki@...iumnetworks.com,
        linux-pci@...r.kernel.org,
        Catalin Marinas <catalin.marinas@....com>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Will Deacon <will.deacon@....com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        linux-mm@...ck.org, wanghuiqiang@...wei.com,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        zhongjiang <zhongjiang@...wei.com>,
        linux-arm <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 1/2] arm64: avoid alloc memory on offline node

On Tue 12-06-18 16:08:03, Punit Agrawal wrote:
> Michal Hocko <mhocko@...nel.org> writes:
[...]
> > Well, the standard way to handle memory less NUMA nodes is to simply
> > fallback to the closest NUMA node. We even have an API for that
> > (numa_mem_id).
> 
> CONFIG_HAVE_MEMORYLESS node is not enabled on arm64 which means we end
> up returning the original node in the fallback path.

Yes this makes more sense.
-- 
Michal Hocko
SUSE Labs