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Date: Fri, 23 Oct 2015 17:46:20 +0800
From: Dave Young <dyoung@redhat.com>
Subject: Re: [PATCH] kexec: Add --lite option
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To: Geoff Levand <geoff@infradead.org>
Cc: panand@redhat.com, Simon Horman <horms@verge.net.au>, kexec@lists.infradead.org, Petitboot@lists.ozlabs.org, vgoyal@redhat.com

Hi, Geoff

On 10/22/15 at 11:57am, Geoff Levand wrote:
> Hi Dave,
> 
> On Thu, 2015-10-22 at 11:17 +0800, Dave Young wrote:
> > On 10/21/15 at 04:12pm, Geoff Levand wrote:
> > > Add a new option --lite to kexec that allows for a fast reboot
> > > by avoiding the purgatory integrity checks.  This option is
> > > intended for use by kexec based bootloaders that load a new
> > > image and then immediately transfer control to it.
> > 
> > I think Vivek was rejecting this --lite since kdump need the purgatory
> > integrity checks. Ccing him.
> 
> As stated, this is not intended for use by kdump.
> 
> This is an optional feature.  It does not remove the integrity
> checks, but provides the user a way to bypass them if they so
> desire.

Problem is why they so desire to skip purgatory? what is the background?
If the only problem is the performace issue without cache enabled then
I think it is not a strong one. We have a design to verify the image and it
works why can't we maintain it and fix the issue instead of introducing
the --lite? 

Thanks
Dave

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