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

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Message-ID: <4BF0FBB0.1080707@linux.intel.com>
Date:	Mon, 17 May 2010 16:17:52 +0800
From:	Haicheng Li <haicheng.li@...ux.intel.com>
To:	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>
CC:	"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: [PATCH 0/3] Fix boot_pageset sharing issue for new populated zones
 of hotadded nodes

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.

---
  include/linux/memory_hotplug.h |    8 +++++
  include/linux/mmzone.h         |    2 +-
  init/main.c                    |    2 +-
  mm/memory_hotplug.c            |   27 +++++++++++-----
  mm/page_alloc.c                |   66 +++++++++++++++++++++++++++-------------
  5 files changed, 74 insertions(+), 31 deletions(-)
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