Re: [PATCH v7 0/5] kdump: Allow ELF header creation in new kernel

From: Michael Holzheu <holzheu@linux.vnet.ibm.com>
To: Vivek Goyal <vgoyal@redhat.com>
Cc: kexec@lists.infradead.org,
	Heiko Carstens <heiko.carstens@de.ibm.com>,
	linux-kernel@vger.kernel.org, Jan Willeke <willeke@de.ibm.com>,
	HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>,
	Martin Schwidefsky <schwidefsky@de.ibm.com>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH v7 0/5] kdump: Allow ELF header creation in new kernel
Date: Thu, 18 Jul 2013 12:40:04 +0200	[thread overview]
Message-ID: <20130718124004.098b85f4@holzheu> (raw)
In-Reply-To: <20130717214207.GB27633@redhat.com>

On Wed, 17 Jul 2013 17:42:07 -0400
Vivek Goyal <vgoyal@redhat.com> wrote:
> On Wed, Jul 17, 2013 at 06:00:49PM +0200, Michael Holzheu wrote:

[snip]

> > But this is all additional effort now and would not be necessary if we
> > integrate this patch series in 3.11.
> > 
> > Perhaps we should let Andrew decide here.
> 
> Hi Michael,
> 
> Given the fact that andrew too prefers a fix to get s390 working at this
> stage can we modify s390 copy_from_oldmem() to be able to copy to 
> vmalloc() memory area.
> 
> For mmap(), let us disable it on s390. And rest of the cleanups w.r.t
> ELF header swap etc, let us now target that for 3.12.
> 
> Sounds reasonable?

Hi Vivek,

Ok this is not our preferred solution but we can't expect that life is
always easy ;-)

Our s390 kernel maintainer Martin Schwidefsky agreed to send the following
two patches upstream for 3.11:

 * s390/kdump: Disable mmap for s390
 * s390/kdump: Allow copy_oldmem_page() copy to virtual memory

@Andrew:

Would you then take the "ELF header in new memory" patch series for 3.12?

Regards,
Michael

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