Re: [PATCH 0/2] mm: vmemmap: add vmemmap_verify check for hot-addnode/memory case

From: Andrew Morton
Date: Mon Apr 08 2013 - 16:55:59 EST

On Mon, 8 Apr 2013 11:40:11 -0700 Yinghai Lu <yinghai@xxxxxxxxxx> wrote:

> On Mon, Apr 8, 2013 at 2:56 AM, Lin Feng <linfeng@xxxxxxxxxxxxxx> wrote:
> > In hot add node(memory) case, vmemmap pages are always allocated from other
> > node,
> that is broken, and should be fixed.
> vmemmap should be on local node even for hot add node.

That would be nice.

I don't see much value in the added warnings, really. Because there's
nothing the user can *do* about them, apart from a) stop using NUMA, b)
stop using memory hotplug, c) become a kernel MM developer or d) switch
to Windows.

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