linux-kernel - Re: [patch 0/9] kdump: Patch series for s390 support

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Date:	Wed, 20 Jul 2011 16:24:29 -0400
From:	Vivek Goyal <vgoyal@...hat.com>
To:	Michael Holzheu <holzheu@...ux.vnet.ibm.com>
Cc:	Martin Schwidefsky <schwidefsky@...ibm.com>, ebiederm@...ssion.com,
	hbabu@...ibm.com, mahesh@...ux.vnet.ibm.com,
	oomichi@....nes.nec.co.jp, horms@...ge.net.au,
	heiko.carstens@...ibm.com, kexec@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org
Subject: Re: [patch 0/9] kdump: Patch series for s390 support

On Wed, Jul 20, 2011 at 11:28:35AM +0200, Michael Holzheu wrote:

[..]
> > > What you as kdump framework maintainer would have to accept with this
> > > solution is that it is allowed now to start kdump directly via purgatory
> > > without using code from the old kernel (e.g. crash_kexec). This has as
> > > implication that all things that the old kernel has to initialize for
> > > kdump has to be done before the system crashes. Currently this is only
> > > the initialization of vmcoreinfo.
> > 
> > when would you save vmcoreinfo? I guess I shall have to look at the
> > patches.
> 
> patch #4: We have to save vmcoreinfo at startup time of the production
> kernel.
> 
> Perhaps it would be best to send you a new patch series with our latest
> proposal.

This patch 4 looks reasonable. So you will prepare notes after boot and
refresh it after adding CRASHTIME if crash_kexec() is executed.

Vivek
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