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From: Vivek Goyal <vgoyal@redhat.com>
To: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: keir@xen.org, keescook@chromium.org,
	Daniel Kiper <daniel.kiper@oracle.com>,
	kexec@lists.infradead.org, linux-kernel@vger.kernel.org,
	xen-devel@lists.xen.org, hbabu@us.ibm.com, ebiederm@xmission.com,
	jbeulich@suse.com, hpa@linux.intel.com, david.vrabel@citrix.com
Subject: Re: kexec: Clearing registers just before jumping into purgatory
Date: Fri, 11 Oct 2013 11:44:50 -0400	[thread overview]
Message-ID: <20131011154450.GB2772@redhat.com> (raw)
In-Reply-To: <20131011153727.GA30181@srcf.ucam.org>

On Fri, Oct 11, 2013 at 04:37:27PM +0100, Matthew Garrett wrote:
> On Fri, Oct 11, 2013 at 08:52:06AM -0400, Vivek Goyal wrote:
> > On Fri, Oct 11, 2013 at 01:04:55PM +0200, Daniel Kiper wrote:
> > 
> > [..]
> > > > In theory you can swap between to kernels with the preserve_context
> > > > case.  Technically I like the ability but I don't know that it has ever
> > > > achieved much uptake.
> > > 
> > > I think that this is nice idea too. However, I have not seen its usage in real.
> > > Even once there was an idea to remove that stuff from Linux Kernel.
> > 
> > I have not seen anybody using it. I don't even know if it works or not.
> 
> It works. I'm using it.

Hi Matthew,

Just Curious. How is it useful. IOW, what's your use case of booting a new
kernel and then jumping back.

Thanks
Vivek

_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec

WARNING: multiple messages have this Message-ID (diff)
From: Vivek Goyal <vgoyal@redhat.com>
To: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Daniel Kiper <daniel.kiper@oracle.com>,
	ebiederm@xmission.com, hbabu@us.ibm.com, hpa@linux.intel.com,
	keescook@chromium.org, kexec@lists.infradead.org,
	linux-kernel@vger.kernel.org, david.vrabel@citrix.com,
	jbeulich@suse.com, keir@xen.org, xen-devel@lists.xen.org
Subject: Re: kexec: Clearing registers just before jumping into purgatory
Date: Fri, 11 Oct 2013 11:44:50 -0400	[thread overview]
Message-ID: <20131011154450.GB2772@redhat.com> (raw)
In-Reply-To: <20131011153727.GA30181@srcf.ucam.org>

On Fri, Oct 11, 2013 at 04:37:27PM +0100, Matthew Garrett wrote:
> On Fri, Oct 11, 2013 at 08:52:06AM -0400, Vivek Goyal wrote:
> > On Fri, Oct 11, 2013 at 01:04:55PM +0200, Daniel Kiper wrote:
> > 
> > [..]
> > > > In theory you can swap between to kernels with the preserve_context
> > > > case.  Technically I like the ability but I don't know that it has ever
> > > > achieved much uptake.
> > > 
> > > I think that this is nice idea too. However, I have not seen its usage in real.
> > > Even once there was an idea to remove that stuff from Linux Kernel.
> > 
> > I have not seen anybody using it. I don't even know if it works or not.
> 
> It works. I'm using it.

Hi Matthew,

Just Curious. How is it useful. IOW, what's your use case of booting a new
kernel and then jumping back.

Thanks
Vivek

  reply	other threads:[~2013-10-11 15:45 UTC|newest]

Thread overview: 63+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-10-11  9:28 kexec: Clearing registers just before jumping into purgatory Daniel Kiper
2013-10-11  9:28 ` Daniel Kiper
2013-10-11 10:08 ` Eric W. Biederman
2013-10-11 10:08 ` Eric W. Biederman
2013-10-11 10:08   ` Eric W. Biederman
2013-10-11 11:04   ` Daniel Kiper
2013-10-11 11:04     ` Daniel Kiper
2013-10-11 12:52     ` Vivek Goyal
2013-10-11 12:52       ` Vivek Goyal
2013-10-11 15:37       ` Matthew Garrett
2013-10-11 15:37       ` Matthew Garrett
2013-10-11 15:37         ` Matthew Garrett
2013-10-11 15:44         ` Vivek Goyal [this message]
2013-10-11 15:44           ` Vivek Goyal
2013-10-11 15:48           ` Matthew Garrett
2013-10-11 15:48           ` Matthew Garrett
2013-10-11 15:48             ` Matthew Garrett
2013-10-11 16:33             ` Richard Weinberger
2013-10-11 16:33               ` Richard Weinberger
2013-10-11 16:39               ` Matthew Garrett
2013-10-11 16:39               ` Matthew Garrett
2013-10-11 16:39                 ` Matthew Garrett
2013-10-11 16:42                 ` Richard Weinberger
2013-10-11 16:42                   ` Richard Weinberger
2013-10-11 16:44                   ` Matthew Garrett
2013-10-11 16:44                   ` Matthew Garrett
2013-10-11 16:44                     ` Matthew Garrett
2013-10-11 16:47                     ` Richard Weinberger
2013-10-11 16:47                       ` Richard Weinberger
2013-10-11 16:55                       ` Matthew Garrett
2013-10-11 16:55                         ` Matthew Garrett
2013-10-11 16:59                         ` Richard Weinberger
2013-10-11 16:59                         ` Richard Weinberger
2013-10-11 16:59                           ` Richard Weinberger
2013-10-11 17:01                           ` Matthew Garrett
2013-10-11 17:01                           ` Matthew Garrett
2013-10-11 17:01                             ` Matthew Garrett
2013-10-11 20:44                             ` Eric W. Biederman
2013-10-11 20:44                               ` Eric W. Biederman
2013-10-11 20:50                               ` Matthew Garrett
2013-10-11 20:50                                 ` Matthew Garrett
2013-10-11 20:50                               ` Matthew Garrett
2013-10-11 20:44                             ` Eric W. Biederman
2013-10-11 16:55                       ` Matthew Garrett
2013-10-11 16:47                     ` Richard Weinberger
2013-10-11 16:53                     ` Vivek Goyal
2013-10-11 16:53                       ` Vivek Goyal
2013-10-11 16:56                       ` Matthew Garrett
2013-10-11 16:56                       ` Matthew Garrett
2013-10-11 16:56                         ` Matthew Garrett
2013-10-11 16:53                     ` Vivek Goyal
2013-10-11 16:42                 ` Richard Weinberger
2013-10-11 16:33             ` Richard Weinberger
2013-10-11 15:44         ` Vivek Goyal
2013-10-11 12:52     ` Vivek Goyal
2013-10-11 22:15     ` Eric W. Biederman
2013-10-11 22:15     ` Eric W. Biederman
2013-10-11 22:15       ` Eric W. Biederman
2013-10-14 18:24       ` Daniel Kiper
2013-10-14 18:24       ` Daniel Kiper
2013-10-14 18:24         ` Daniel Kiper
2013-10-11 11:04   ` Daniel Kiper
  -- strict thread matches above, loose matches on Subject: below --
2013-10-11  9:28 Daniel Kiper

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