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From: ebiederm@xmission.com (Eric W. Biederman)
References: <20130321.115920.339923125.d.hatayama@jp.fujitsu.com>
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 <20130322.093042.393566604.d.hatayama@jp.fujitsu.com>
Date: Thu, 21 Mar 2013 17:41:51 -0700
In-Reply-To: <20130322.093042.393566604.d.hatayama@jp.fujitsu.com> (HATAYAMA
 Daisuke's message of "Fri, 22 Mar 2013 09:30:42 +0900 (JST)")
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Subject: Re: [PATCH v3 17/21] vmcore: check NT_VMCORE_PAD as a mark indicating
 the end of ELF note buffer
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To: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>
Cc: kexec@lists.infradead.org, heiko.carstens@de.ibm.com, linux-kernel@vger.kernel.org, lisa.mitchell@hp.com, kumagai-atsushi@mxc.nes.nec.co.jp, zhangyanfei@cn.fujitsu.com, akpm@linux-foundation.org, cpw@sgi.com, vgoyal@redhat.com

HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com> writes:

> From: Vivek Goyal <vgoyal@redhat.com>
> Subject: Re: [PATCH v3 17/21] vmcore: check NT_VMCORE_PAD as a mark indicating the end of ELF note buffer
> Date: Thu, 21 Mar 2013 10:36:56 -0400
>
>> And in our case we don't know the size of ELF note. Kernel is not
>> exporting the size. So kexec-tools is putting an upper limit of 1024
>> and putting that value in p_memsz and p_filesz fields.
>> 
>> Given the fact that we are reserving elf notes at boot. That means
>> we know the size of ELF notes. It should make sense to export it
>> to user space and let kexec-tools put right values.
>> 
>
> Anyway, I think of this issue as beyond the scope of what I'm working
> here...

Agreed.  It is independent and can be fixed independently.

Eric

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