From: Ian Campbell <Ian.Campbell@citrix.com>
To: Daniel Kiper <daniel.kiper@oracle.com>
Cc: Jan Beulich <JBeulich@suse.com>,
"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
"konrad.wilk@oracle.com" <konrad.wilk@oracle.com>,
Andrew Cooper <Andrew.Cooper3@citrix.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>,
"H. Peter Anvin" <hpa@zytor.com>,
"tglx@linutronix.de" <tglx@linutronix.de>
Subject: Re: [Xen-devel] [PATCH v2 01/11] kexec: introduce kexec_ops struct
Date: Fri, 23 Nov 2012 10:51:08 +0000 [thread overview]
Message-ID: <1353667868.13542.218.camel@zakaz.uk.xensource.com> (raw)
In-Reply-To: <20121123103726.GB2921@host-192-168-1-59.local.net-space.pl>
On Fri, 2012-11-23 at 10:37 +0000, Daniel Kiper wrote:
> On Fri, Nov 23, 2012 at 09:53:37AM +0000, Jan Beulich wrote:
> > >>> On 23.11.12 at 02:56, Andrew Cooper <andrew.cooper3@citrix.com> wrote:
> > > The crash region (as specified by crashkernel= on the Xen command line)
> > > is isolated from dom0.
> > >[...]
> >
> > But all of this _could_ be done completely independent of the
> > Dom0 kernel's kexec infrastructure (i.e. fully from user space,
> > invoking the necessary hypercalls through the privcmd driver).
>
> No, this is impossible. kexec/kdump image lives in dom0 kernel memory
> until execution.
Are you sure? I could have sworn they lived in the hypervisor owned
memory set aside by the crashkernel= parameter as Andy suggested.
Ian.
next prev parent reply other threads:[~2012-11-23 10:51 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-20 15:04 [PATCH v2 00/11] xen: Initial kexec/kdump implementation Daniel Kiper
2012-11-20 15:04 ` [PATCH v2 01/11] kexec: introduce kexec_ops struct Daniel Kiper
2012-11-20 15:04 ` [PATCH v2 02/11] x86/kexec: Add extra pointers to transition page table PGD, PUD, PMD and PTE Daniel Kiper
2012-11-20 15:04 ` [PATCH v2 03/11] xen: Introduce architecture independent data for kexec/kdump Daniel Kiper
2012-11-20 15:04 ` [PATCH v2 04/11] x86/xen: Introduce architecture dependent " Daniel Kiper
2012-11-20 15:04 ` [PATCH v2 05/11] x86/xen: Register resources required by kexec-tools Daniel Kiper
2012-11-20 15:04 ` [PATCH v2 06/11] x86/xen: Add i386 kexec/kdump implementation Daniel Kiper
2012-11-20 15:04 ` [PATCH v2 07/11] x86/xen: Add x86_64 " Daniel Kiper
2012-11-20 15:04 ` [PATCH v2 08/11] x86/xen: Add kexec/kdump makefile rules Daniel Kiper
2012-11-20 15:04 ` [PATCH v2 09/11] x86/xen/enlighten: Add init and crash kexec/kdump hooks Daniel Kiper
2012-11-20 15:04 ` [PATCH v2 10/11] drivers/xen: Export vmcoreinfo through sysfs Daniel Kiper
2012-11-20 15:04 ` [PATCH v2 11/11] x86: Add Xen kexec control code size check to linker script Daniel Kiper
2012-11-20 15:52 ` [PATCH v2 02/11] x86/kexec: Add extra pointers to transition page table PGD, PUD, PMD and PTE Jan Beulich
2012-11-20 16:40 ` [PATCH v2 01/11] kexec: introduce kexec_ops struct Eric W. Biederman
2012-11-21 10:52 ` Daniel Kiper
2012-11-22 12:15 ` Eric W. Biederman
2012-11-22 17:37 ` H. Peter Anvin
2012-11-23 9:56 ` Jan Beulich
2012-11-23 10:53 ` [Xen-devel] " Ian Campbell
2012-11-22 17:47 ` H. Peter Anvin
2012-11-22 18:07 ` Andrew Cooper
2012-11-22 22:26 ` H. Peter Anvin
2014-03-31 10:50 ` Petr Tesarik
2012-11-23 0:12 ` Andrew Cooper
2012-11-23 1:34 ` H. Peter Anvin
2012-11-23 1:38 ` H. Peter Anvin
2012-11-23 1:56 ` Andrew Cooper
2012-11-23 9:53 ` Jan Beulich
2012-11-23 10:37 ` Daniel Kiper
2012-11-23 10:51 ` Ian Campbell [this message]
2012-11-23 11:13 ` [Xen-devel] " Daniel Kiper
2012-11-23 10:51 ` Jan Beulich
2012-11-23 11:08 ` Daniel Kiper
2012-11-23 9:47 ` Daniel Kiper
2012-11-23 20:24 ` Eric W. Biederman
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=1353667868.13542.218.camel@zakaz.uk.xensource.com \
--to=ian.campbell@citrix.com \
--cc=Andrew.Cooper3@citrix.com \
--cc=JBeulich@suse.com \
--cc=daniel.kiper@oracle.com \
--cc=ebiederm@xmission.com \
--cc=hpa@zytor.com \
--cc=kexec@lists.infradead.org \
--cc=konrad.wilk@oracle.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=tglx@linutronix.de \
--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).