From: Geoff Levand <geoff@infradead.org>
To: Vivek Goyal <vgoyal@redhat.com>, Dave Young <dyoung@redhat.com>
Cc: panand@redhat.com, Simon Horman <horms@verge.net.au>,
kexec@lists.infradead.org, Petitboot@lists.ozlabs.org
Subject: Re: [PATCH] kexec: Add --lite option
Date: Thu, 22 Oct 2015 12:08:11 -0700 [thread overview]
Message-ID: <1445540891.30908.144.camel@infradead.org> (raw)
In-Reply-To: <20151022125012.GB20847@redhat.com>
Hi Vivek,
On Thu, 2015-10-22 at 08:50 -0400, Vivek Goyal wrote:
> On Thu, Oct 22, 2015 at 11:17:18AM +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.
>
> Right. Why are we trying to bypass sha256 hash verification of loaded
> segments at run time, that needs to be justified.
Please see my reply to Dave.
> Atleast on x86, this integrity verification was fast and we did not
> notice any siginificant delays in purgatory. And in that case extra knob
> like this is hard to justify.
I notice the difference on the my arm64 system, so I guess we
are even on that.
In general, faster boot times are desirable. This option allows
a faster system boot for kexec based bootloaders that use
kexec-tools.
-Geoff
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next prev parent reply other threads:[~2015-10-22 19:08 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-21 23:12 [PATCH] kexec: Add --lite option Geoff Levand
2015-10-22 0:02 ` Jeremy Kerr
2015-10-22 0:37 ` Geoff Levand
2015-11-05 6:20 ` Scott Wood
2015-10-22 3:17 ` Dave Young
2015-10-22 12:50 ` Vivek Goyal
2015-10-22 19:08 ` Geoff Levand [this message]
2015-11-05 5:56 ` Scott Wood
2015-12-07 11:45 ` Pratyush Anand
2015-12-07 11:48 ` Pratyush Anand
2015-12-07 13:16 ` James Morse
2015-12-07 14:07 ` Pratyush Anand
2015-12-08 1:03 ` Scott Wood
2015-12-08 16:00 ` James Morse
2015-12-09 9:28 ` Pratyush Anand
2016-01-11 12:46 ` Pratyush Anand
2016-01-12 1:06 ` Simon Horman
2015-10-22 18:57 ` Geoff Levand
2015-10-22 19:04 ` Vivek Goyal
2015-10-23 9:46 ` Dave Young
2015-10-23 18:49 ` Geoff Levand
2015-10-23 19:02 ` Eric W. Biederman
2018-04-11 18:30 ` [PATCH v2] kexec: Add --no-checks option Geoff Levand
2018-04-19 8:38 ` Simon Horman
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