From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: Daniel Kiper <daniel.kiper@oracle.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
"maxim.uvarov@oracle.com" <maxim.uvarov@oracle.com>,
"x86@kernel.org" <x86@kernel.org>,
"kexec@lists.infradead.org" <kexec@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"virtualization@lists.linux-foundation.org"
<virtualization@lists.linux-foundation.org>,
"mingo@redhat.com" <mingo@redhat.com>,
"Eric W. Biederman" <ebiederm@xmission.com>,
"jbeulich@suse.com" <jbeulich@suse.com>,
"H. Peter Anvin" <hpa@zytor.com>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"vgoyal@redhat.com" <vgoyal@redhat.com>
Subject: Re: [Xen-devel] [PATCH v3 00/11] xen: Initial kexec/kdump implementation
Date: Fri, 4 Jan 2013 09:34:12 -0500 [thread overview]
Message-ID: <20130104143412.GB3334@phenom.dumpdata.com> (raw)
In-Reply-To: <20130104142257.GC3346@host-192-168-1-59.local.net-space.pl>
On Fri, Jan 04, 2013 at 03:22:57PM +0100, Daniel Kiper wrote:
> On Wed, Jan 02, 2013 at 11:26:43AM +0000, Andrew Cooper wrote:
> > On 27/12/12 18:02, Eric W. Biederman wrote:
> > >Andrew Cooper<andrew.cooper3@citrix.com> writes:
> > >
> > >>On 27/12/2012 07:53, Eric W. Biederman wrote:
> > >>>The syscall ABI still has the wrong semantics.
> > >>>
> > >>>Aka totally unmaintainable and umergeable.
> > >>>
> > >>>The concept of domU support is also strange. What does domU support even mean, when the dom0 support is loading a kernel to pick up Xen when Xen falls over.
> > >>There are two requirements pulling at this patch series, but I agree
> > >>that we need to clarify them.
> > >It probably make sense to split them apart a little even.
> > >
> > >
> >
> > Thinking about this split, there might be a way to simply it even more.
> >
> > /sbin/kexec can load the "Xen" crash kernel itself by issuing
> > hypercalls using /dev/xen/privcmd. This would remove the need for
> > the dom0 kernel to distinguish between loading a crash kernel for
> > itself and loading a kernel for Xen.
> >
> > Or is this just a silly idea complicating the matter?
>
> This is impossible with current Xen kexec/kdump interface.
> It should be changed to do that. However, I suppose that
> Xen community would not be interested in such changes.
Why not? What is involved in it? IMHO I believe anybody would
welcome a new clean design that solves this thorny problem?
next prev parent reply other threads:[~2013-01-04 14:34 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-27 2:18 [PATCH v3 00/11] xen: Initial kexec/kdump implementation Daniel Kiper
[not found] ` <1356574740-6806-1-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 01/11] kexec: introduce kexec firmware support Daniel Kiper
[not found] ` <1356574740-6806-2-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 02/11] x86/kexec: Add extra pointers to transition page table PGD, PUD, PMD and PTE Daniel Kiper
[not found] ` <1356574740-6806-3-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 03/11] xen: Introduce architecture independent data for kexec/kdump Daniel Kiper
[not found] ` <1356574740-6806-4-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 04/11] x86/xen: Introduce architecture dependent " Daniel Kiper
[not found] ` <1356574740-6806-5-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 05/11] x86/xen: Register resources required by kexec-tools Daniel Kiper
[not found] ` <1356574740-6806-6-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 06/11] x86/xen: Add i386 kexec/kdump implementation Daniel Kiper
[not found] ` <1356574740-6806-7-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 07/11] x86/xen: Add x86_64 " Daniel Kiper
[not found] ` <1356574740-6806-8-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 08/11] x86/xen: Add kexec/kdump Kconfig and makefile rules Daniel Kiper
[not found] ` <1356574740-6806-9-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 09/11] x86/xen/enlighten: Add init and crash kexec/kdump hooks Daniel Kiper
[not found] ` <1356574740-6806-10-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:18 ` [PATCH v3 10/11] drivers/xen: Export vmcoreinfo through sysfs Daniel Kiper
[not found] ` <1356574740-6806-11-git-send-email-daniel.kiper-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2012-12-27 2:19 ` [PATCH v3 11/11] x86: Add Xen kexec control code size check to linker script Daniel Kiper
2012-12-27 18:53 ` [PATCH v3 09/11] x86/xen/enlighten: Add init and crash kexec/kdump hooks H. Peter Anvin
2012-12-27 4:00 ` [PATCH v3 06/11] x86/xen: Add i386 kexec/kdump implementation H. Peter Anvin
2012-12-27 3:33 ` [PATCH v3 02/11] x86/kexec: Add extra pointers to transition page table PGD, PUD, PMD and PTE H. Peter Anvin
2013-01-03 9:34 ` Jan Beulich
[not found] ` <50E55ECF02000078000B2A13@nat28.tlf.novell.com>
2013-01-04 15:15 ` Daniel Kiper
[not found] ` <20130104151542.GD3346@host-192-168-1-59.local.net-space.pl>
2013-01-04 16:12 ` Jan Beulich
[not found] ` <50E70D8002000078000B336D@nat28.tlf.novell.com>
2013-01-04 17:25 ` Daniel Kiper
[not found] ` <20130104172538.GC3472@host-192-168-1-59.local.net-space.pl>
2013-01-07 9:48 ` Jan Beulich
[not found] ` <50EAA7F402000078000B34C3@nat28.tlf.novell.com>
2013-01-07 12:52 ` Daniel Kiper
[not found] ` <20130107125211.GB2927@host-192-168-1-59.local.net-space.pl>
2013-01-07 13:05 ` Jan Beulich
[not found] ` <50EAD61602000078000B36A0@nat28.tlf.novell.com>
2013-01-09 18:42 ` Daniel Kiper
2013-01-10 14:07 ` David Vrabel
[not found] ` <50EECB23.4090603@citrix.com>
2013-01-11 13:36 ` Daniel Kiper
2012-12-27 4:46 ` [PATCH v3 01/11] kexec: introduce kexec firmware support Eric W. Biederman
2012-12-27 4:02 ` [PATCH v3 00/11] xen: Initial kexec/kdump implementation H. Peter Anvin
2012-12-27 7:53 ` Eric W. Biederman
2012-12-27 14:18 ` Andrew Cooper
2012-12-27 18:02 ` Eric W. Biederman
2013-01-02 11:26 ` [Xen-devel] " Andrew Cooper
2013-01-02 11:47 ` Eric W. Biederman
2013-01-03 9:31 ` Jan Beulich
2013-01-04 14:22 ` Daniel Kiper
2013-01-04 14:34 ` Konrad Rzeszutek Wilk [this message]
2013-01-04 14:34 ` Ian Campbell
2013-01-04 14:38 ` David Vrabel
2013-01-04 17:01 ` Daniel Kiper
2013-01-10 14:19 ` David Vrabel
2013-01-11 13:22 ` Daniel Kiper
2013-01-11 15:22 ` David Vrabel
2013-01-11 17:34 ` Daniel Kiper
2013-01-11 20:05 ` Eric W. Biederman
2013-01-04 14:41 ` Jan Beulich
[not found] ` <50E6F81D02000078000B3245-ce6RLXgGx+vWGUEhTRrCg1aTQe2KTcn/@public.gmane.org>
2013-01-04 17:07 ` Daniel Kiper
2013-01-04 19:11 ` Konrad Rzeszutek Wilk
[not found] ` <20130104191146.GC6721-6K5HmflnPlqSPmnEAIUT9EEOCMrvLtNR@public.gmane.org>
2013-01-07 10:25 ` Ian Campbell
2013-01-07 10:46 ` Andrew Cooper
2013-01-07 10:54 ` Ian Campbell
2013-01-07 12:34 ` Daniel Kiper
[not found] ` <20130107123404.GA2927-UojuW/CpjwpdUOLzJiIvSsFoITBeLw/klGfBN0aaEZ+lPcVs/6D9LQ@public.gmane.org>
2013-01-07 13:49 ` Ian Campbell
2013-01-11 13:47 ` Daniel Kiper
2013-01-07 16:20 ` Konrad Rzeszutek Wilk
2013-01-11 4:16 ` Eric W. Biederman
2013-01-11 16:55 ` Konrad Rzeszutek Wilk
2013-01-11 20:26 ` H. Peter Anvin
2013-01-11 20:43 ` Vivek Goyal
2013-01-11 20:26 ` Eric W. Biederman
2013-01-11 20:52 ` Vivek Goyal
[not found] ` <20130111205232.GC17126-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2013-01-11 21:03 ` H. Peter Anvin
[not found] ` <50F07E2D.6010602-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2013-01-11 21:08 ` Vivek Goyal
2013-01-11 21:14 ` H. Peter Anvin
[not found] ` <50DC58C4.3000307-Sxgqhf6Nn4DQT0dZR+AlfA@public.gmane.org>
2013-01-02 15:27 ` Ian Campbell
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20130104143412.GB3334@phenom.dumpdata.com \
--to=konrad.wilk@oracle.com \
--cc=andrew.cooper3@citrix.com \
--cc=daniel.kiper@oracle.com \
--cc=ebiederm@xmission.com \
--cc=hpa@zytor.com \
--cc=jbeulich@suse.com \
--cc=kexec@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=maxim.uvarov@oracle.com \
--cc=mingo@redhat.com \
--cc=tglx@linutronix.de \
--cc=vgoyal@redhat.com \
--cc=virtualization@lists.linux-foundation.org \
--cc=x86@kernel.org \
--cc=xen-devel@lists.xensource.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).