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Date: Wed, 20 Feb 2013 09:38:16 +0800
From: Xishi Qiu <qiuxishi@huawei.com>
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To: Tony Luck <tony.luck@gmail.com>
CC: Matt Fleming <matt.fleming@intel.com>, <fenghua.yu@intel.com>,
        Liujiang <jiang.liu@huawei.com>,
        Andrew Morton <akpm@linux-foundation.org>,
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        <linux-efi@vger.kernel.org>, <linux-mm@kvack.org>,
        Hanjun Guo <guohanjun@huawei.com>, WuJianguo <wujianguo@huawei.com>
Subject: Re: [PATCH V3] ia64/mm: fix a bad_page bug when crash kernel booting
References: <51074786.5030007@huawei.com> <1359995565.7515.178.camel@mfleming-mobl1.ger.corp.intel.com> <51131248.3080203@huawei.com> <5113450C.1080109@huawei.com> <CA+8MBbKuBheEj9t8whJBc=S7NdxCF8MvuD2Ajm7suP=7JC01fg@mail.gmail.com>
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On 2013/2/20 5:56, Tony Luck wrote:

> Foolishly sent an earlier reply from Outlook which appears
> to have mangled/lost it. Trying again ...
> 
>> In efi_init() memory aligns in IA64_GRANULE_SIZE(16M). If set "crashkernel=1024M-:600M"
> 
> Is this where the real problem begins?  Should we insist that users

Hi Tony, I think this is the real problem begins and it only appears when use Sparse-Memory.

> provide crashkernel
> parameters rounded to GRANULE boundaries?
> 

Seems like a good idea, should we modify "\linux\Documentation\kernel-parameters.txt"?

Thanks,
Xishi Qiu

> -Tony
>