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Date:   Mon, 8 Jul 2019 20:26:08 +0200 (CEST)
From:   Thomas Gleixner <tglx@linutronix.de>
To:     Andy Lutomirski <luto@amacapital.net>
cc:     Pingfan Liu <kernelfans@gmail.com>, x86@kernel.org,
        Michal Hocko <mhocko@suse.com>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Mike Rapoport <rppt@linux.ibm.com>,
        Tony Luck <tony.luck@intel.com>,
        Andy Lutomirski <luto@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
        "H. Peter Anvin" <hpa@zytor.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Vlastimil Babka <vbabka@suse.cz>,
        Oscar Salvador <osalvador@suse.de>,
        Pavel Tatashin <pavel.tatashin@microsoft.com>,
        Mel Gorman <mgorman@techsingularity.net>,
        Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Stephen Rothwell <sfr@canb.auug.org.au>, Qian Cai <cai@lca.pw>,
        Barret Rhoden <brho@google.com>,
        Bjorn Helgaas <bhelgaas@google.com>,
        David Rientjes <rientjes@google.com>, linux-mm@kvack.org,
        LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 2/2] x86/numa: instance all parsed numa node
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On Mon, 8 Jul 2019, Andy Lutomirski wrote:
> > On Jul 8, 2019, at 3:35 AM, Thomas Gleixner <tglx@linutronix.de> wrote:
> > Anything less than the actual number of present CPUs is problematic except
> > you use the 'let's hope nothing happens' approach. We could add an option
> > to stop the bringup at the early online state similar to what we do for
> > 'nosmt'.
> > 
> How about we change nr_cpus to do that instead so we never have to have
> this conversation again?

Actually not the worst idea. We have all the infrastructure already.

Thanks,

	tglx