linux-kernel - Re: [PATCH 0/3] Fix boot_pageset sharing issue for new populated zones of hotadded nodes

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Message-ID: <20100517103434.GC20761@basil.fritz.box>
Date:	Mon, 17 May 2010 12:34:34 +0200
From:	Andi Kleen <andi@...stfloor.org>
To:	Haicheng Li <haicheng.li@...ux.intel.com>
Cc:	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Wu, Fengguang" <fengguang.wu@...el.com>,
	Andi Kleen <andi@...stfloor.org>, Mel Gorman <mel@....ul.ie>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Tejun Heo <tj@...nel.org>
Subject: Re: [PATCH 0/3] Fix boot_pageset sharing issue for new populated
	zones of hotadded nodes

On Mon, May 17, 2010 at 04:17:52PM +0800, Haicheng Li wrote:
> In our recent cpu/memory hotadd testing, with multiple nodes hotadded,
> kernel easily panics under stress workload like kernel building.
>
> The root cause is that the new populated zones of hotadded nodes are
> sharing same per_cpu_pageset, i.e. boot strapping boot_pageset, which
> finally causes page state wrong.
>
> The following three patches will setup the pagesets for hotadded nodes
> with dynamically allocated per_cpu_pageset struct.

Patches look good, thanks.

-Andi
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