Message-ID: <559161EF.7050405@intel.com>
Date: Mon, 29 Jun 2015 08:19:11 -0700
From: Dave Hansen <dave.hansen@intel.com>
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To: Xishi Qiu <qiuxishi@huawei.com>, Andrew Morton <akpm@linux-foundation.org>,
        "H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@kernel.org>,
        "Luck, Tony" <tony.luck@intel.com>, Hanjun Guo <guohanjun@huawei.com>,
        Xiexiuqi <xiexiuqi@huawei.com>, leon@leon.nu,
        Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
        Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
        Vlastimil Babka <vbabka@suse.cz>, Mel Gorman <mgorman@suse.de>
CC: Linux MM <linux-mm@kvack.org>, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [RFC v2 PATCH 0/8] mm: mirrored memory support for page buddy
 allocations
References: <558E084A.60900@huawei.com>
In-Reply-To: <558E084A.60900@huawei.com>
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On 06/26/2015 07:19 PM, Xishi Qiu wrote:
>  drivers/base/node.c      |  17 ++++---
>  fs/proc/meminfo.c        |   6 +++
>  include/linux/memblock.h |  29 ++++++++++--
>  include/linux/mmzone.h   |  10 ++++
>  include/linux/vmstat.h   |   2 +
>  mm/Kconfig               |   8 ++++
>  mm/memblock.c            |  33 +++++++++++--
>  mm/nobootmem.c           |   3 ++
>  mm/page_alloc.c          | 117 ++++++++++++++++++++++++++++++++++++-----------
>  mm/vmstat.c              |   4 ++
>  10 files changed, 190 insertions(+), 39 deletions(-)

Has there been any performance analysis done on this code?  I'm always
nervous when I see page_alloc.c churn.


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