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From: Simon Horman <horms@verge.net.au>
To: Mohan Kumar M <mohan@in.ibm.com>
Cc: ppcdev <linuxppc-dev@ozlabs.org>,
	kexec@lists.infradead.org, paulus@samba.org,
	Maneesh Soni <maneesh@in.ibm.com>
Subject: Re: [PATCH] Relocatable kdump kernel support in kexec-tools
Date: Wed, 8 Oct 2008 17:11:25 +1100	[thread overview]
Message-ID: <20081008061123.GE22396@verge.net.au> (raw)
In-Reply-To: <20080930125621.GC1945@in.ibm.com>

On Tue, Sep 30, 2008 at 06:26:21PM +0530, Mohan Kumar M wrote:
> Relocatable kdump kernel support in kexec-tools
> 
> This patch adds relocatable kernel support for kdump in the kexec-tools
> code. A signature (0xfeed1234) is passed in r6 from panic code to the
> purgatory code through kexec_sequence function. The signature is used to
> differentiate between relocatable kdump kernel and non-kdump kernels.
> 
> The purgatory code compares the signature and sets the __kdump_flag in
> head_64.S by using the offset with respect to next kernel load address.
> During the boot up, kernel code checks __kdump_flag and if it is set, the
> kernel will behave as relocatable kdump kernel.

Thanks Mohan, applied.

-- 
Simon Horman
  VA Linux Systems Japan K.K., Sydney, Australia Satellite Office
  H: www.vergenet.net/~horms/             W: www.valinux.co.jp/en


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WARNING: multiple messages have this Message-ID (diff)
From: Simon Horman <horms@verge.net.au>
To: Mohan Kumar M <mohan@in.ibm.com>
Cc: ppcdev <linuxppc-dev@ozlabs.org>,
	kexec@lists.infradead.org, paulus@samba.org
Subject: Re: [PATCH] Relocatable kdump kernel support in kexec-tools
Date: Wed, 8 Oct 2008 17:11:25 +1100	[thread overview]
Message-ID: <20081008061123.GE22396@verge.net.au> (raw)
In-Reply-To: <20080930125621.GC1945@in.ibm.com>

On Tue, Sep 30, 2008 at 06:26:21PM +0530, Mohan Kumar M wrote:
> Relocatable kdump kernel support in kexec-tools
> 
> This patch adds relocatable kernel support for kdump in the kexec-tools
> code. A signature (0xfeed1234) is passed in r6 from panic code to the
> purgatory code through kexec_sequence function. The signature is used to
> differentiate between relocatable kdump kernel and non-kdump kernels.
> 
> The purgatory code compares the signature and sets the __kdump_flag in
> head_64.S by using the offset with respect to next kernel load address.
> During the boot up, kernel code checks __kdump_flag and if it is set, the
> kernel will behave as relocatable kdump kernel.

Thanks Mohan, applied.

-- 
Simon Horman
  VA Linux Systems Japan K.K., Sydney, Australia Satellite Office
  H: www.vergenet.net/~horms/             W: www.valinux.co.jp/en

  reply	other threads:[~2008-10-08  6:11 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-09-30 12:56 [PATCH] Relocatable kdump kernel support in kexec-tools Mohan Kumar M
2008-09-30 12:56 ` Mohan Kumar M
2008-10-08  6:11 ` Simon Horman [this message]
2008-10-08  6:11   ` Simon Horman

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