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Date:	Fri, 24 May 2013 20:01:36 -0700
From: (Eric W. Biederman)
To:	Zhang Yanfei <>
Cc:	Vivek Goyal <>,
	Michael Holzheu <>,
	HATAYAMA Daisuke <>,
	Jan Willeke <>,
	Martin Schwidefsky <>,
	Heiko Carstens <>,,,
	Andrew Morton <>
Subject: Re: [PATCH 0/2] kdump/mmap: Fix mmap of /proc/vmcore for s390

Zhang Yanfei <> writes:

> Hello Eric,
>> The function copy_oldmem_page also concerns me.  I don't have a clue why
>> we duplicate that function on every architecutre in a slightly different
>> form.  There should be enough abstractions in the kernel to make that
>> unnecessary.  I would be glad to see that function go, and remove the
>> possibility of confusion that happened on s390.
> You mean we should have a common copy_oldmem_page for all architectures? And
> just like vivek said above, for s390, we should put the swap info in the elf
> headers instead of doing that in copy_oldmem_page.


The user space change in /sbin/kexec should even be backwards compatible
for s390.  So fixing /sbin/kexec should probably come first.

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