From: Andrew Cooper <andrew.cooper3@citrix.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
"konrad.wilk@oracle.com" <konrad.wilk@oracle.com>,
Daniel Kiper <daniel.kiper@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>,
"jbeulich@suse.com" <jbeulich@suse.com>,
"H. Peter Anvin" <hpa@zytor.com>,
"maxim.uvarov@oracle.com" <maxim.uvarov@oracle.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: Wed, 2 Jan 2013 11:26:43 +0000 [thread overview]
Message-ID: <50E41973.9050705@citrix.com> (raw)
In-Reply-To: <874nj7qsor.fsf@xmission.com>
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?
~Andrew
_______________________________________________
kexec mailing list
kexec@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/kexec
WARNING: multiple messages have this Message-ID (diff)
From: Andrew Cooper <andrew.cooper3@citrix.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
"konrad.wilk@oracle.com" <konrad.wilk@oracle.com>,
Daniel Kiper <daniel.kiper@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>,
"jbeulich@suse.com" <jbeulich@suse.com>,
"H. Peter Anvin" <hpa@zytor.com>,
"maxim.uvarov@oracle.com" <maxim.uvarov@oracle.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: Wed, 2 Jan 2013 11:26:43 +0000 [thread overview]
Message-ID: <50E41973.9050705@citrix.com> (raw)
In-Reply-To: <874nj7qsor.fsf@xmission.com>
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?
~Andrew
WARNING: multiple messages have this Message-ID (diff)
From: Andrew Cooper <andrew.cooper3@citrix.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: "x86@kernel.org" <x86@kernel.org>,
"konrad.wilk@oracle.com" <konrad.wilk@oracle.com>,
Daniel Kiper <daniel.kiper@oracle.com>,
"H. Peter Anvin" <hpa@zytor.com>,
"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>,
"jbeulich@suse.com" <jbeulich@suse.com>,
"maxim.uvarov@oracle.com" <maxim.uvarov@oracle.com>,
"tglx@linutronix.de" <tglx@linutronix.de>,
"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
"vgoyal@redhat.com" <vgoyal@redhat.com>
Subject: Re: [Xen-devel] [PATCH v3 00/11] xen: Initial kexec/kdump implementation
Date: Wed, 2 Jan 2013 11:26:43 +0000 [thread overview]
Message-ID: <50E41973.9050705@citrix.com> (raw)
In-Reply-To: <874nj7qsor.fsf@xmission.com>
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?
~Andrew
next prev parent reply other threads:[~2013-01-02 11:26 UTC|newest]
Thread overview: 187+ 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
2012-12-27 2:18 ` Daniel Kiper
2012-12-27 2:18 ` [PATCH v3 01/11] kexec: introduce kexec firmware support Daniel Kiper
2012-12-27 2:18 ` Daniel Kiper
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
2012-12-27 2:18 ` Daniel Kiper
2012-12-27 2:18 ` Daniel Kiper
2012-12-27 2:18 ` [PATCH v3 03/11] xen: Introduce architecture independent data for kexec/kdump Daniel Kiper
2012-12-27 2:18 ` Daniel Kiper
2012-12-27 2:18 ` [PATCH v3 04/11] x86/xen: Introduce architecture dependent " Daniel Kiper
2012-12-27 2:18 ` Daniel Kiper
2012-12-27 2:18 ` Daniel Kiper
2012-12-27 2:18 ` [PATCH v3 05/11] x86/xen: Register resources required by kexec-tools Daniel Kiper
2012-12-27 2:18 ` Daniel Kiper
2012-12-27 2:18 ` Daniel Kiper
2012-12-27 2:18 ` [PATCH v3 06/11] x86/xen: Add i386 kexec/kdump implementation Daniel Kiper
2012-12-27 2:18 ` Daniel Kiper
2012-12-27 2:18 ` [PATCH v3 07/11] x86/xen: Add x86_64 " Daniel Kiper
2012-12-27 2:18 ` Daniel Kiper
2012-12-27 2:18 ` Daniel Kiper
2012-12-27 2:18 ` [PATCH v3 08/11] x86/xen: Add kexec/kdump Kconfig and makefile rules Daniel Kiper
2012-12-27 2:18 ` Daniel Kiper
2012-12-27 2:18 ` Daniel Kiper
2012-12-27 2:18 ` [PATCH v3 09/11] x86/xen/enlighten: Add init and crash kexec/kdump hooks Daniel Kiper
2012-12-27 2:18 ` Daniel Kiper
2012-12-27 2:18 ` Daniel Kiper
2012-12-27 2:18 ` [PATCH v3 10/11] drivers/xen: Export vmcoreinfo through sysfs Daniel Kiper
2012-12-27 2:18 ` Daniel Kiper
2012-12-27 2:18 ` Daniel Kiper
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 2:19 ` Daniel Kiper
2012-12-27 2:19 ` 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 18:53 ` H. Peter Anvin
2012-12-27 18:53 ` 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 4:00 ` H. Peter Anvin
2012-12-27 4:00 ` H. Peter Anvin
2012-12-27 2:18 ` Daniel Kiper
2012-12-27 2:18 ` [PATCH v3 03/11] xen: Introduce architecture independent data for kexec/kdump Daniel Kiper
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
2012-12-27 3:33 ` H. Peter Anvin
2013-01-03 9:34 ` Jan Beulich
2013-01-03 9:34 ` Jan Beulich
2013-01-03 9:34 ` Jan Beulich
2013-01-04 15:15 ` Daniel Kiper
2013-01-04 15:15 ` Daniel Kiper
2013-01-04 15:15 ` Daniel Kiper
2013-01-04 16:12 ` Jan Beulich
2013-01-04 16:12 ` Jan Beulich
2013-01-04 16:12 ` Jan Beulich
2013-01-04 17:25 ` Daniel Kiper
2013-01-04 17:25 ` Daniel Kiper
2013-01-04 17:25 ` Daniel Kiper
2013-01-07 9:48 ` Jan Beulich
2013-01-07 9:48 ` Jan Beulich
2013-01-07 12:52 ` Daniel Kiper
2013-01-07 12:52 ` Daniel Kiper
2013-01-07 12:52 ` Daniel Kiper
2013-01-07 13:05 ` Jan Beulich
2013-01-07 13:05 ` Jan Beulich
2013-01-07 13:05 ` Jan Beulich
2013-01-09 18:42 ` Daniel Kiper
2013-01-09 18:42 ` Daniel Kiper
2013-01-09 18:42 ` Daniel Kiper
2013-01-07 9:48 ` Jan Beulich
2013-01-10 14:07 ` [Xen-devel] " David Vrabel
2013-01-10 14:07 ` David Vrabel
2013-01-10 14:07 ` David Vrabel
2013-01-11 13:36 ` Daniel Kiper
2013-01-11 13:36 ` Daniel Kiper
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 4:46 ` Eric W. Biederman
2012-12-27 4:46 ` Eric W. Biederman
2012-12-27 2:18 ` Daniel Kiper
2012-12-27 4:02 ` [PATCH v3 00/11] xen: Initial kexec/kdump implementation H. Peter Anvin
2012-12-27 4:02 ` H. Peter Anvin
2012-12-27 4:02 ` H. Peter Anvin
2012-12-27 7:53 ` Eric W. Biederman
2012-12-27 7:53 ` Eric W. Biederman
2012-12-27 7:53 ` Eric W. Biederman
2012-12-27 14:18 ` Andrew Cooper
2012-12-27 14:18 ` Andrew Cooper
2012-12-27 14:18 ` Andrew Cooper
2012-12-27 18:02 ` Eric W. Biederman
2012-12-27 18:02 ` Eric W. Biederman
2012-12-27 18:02 ` Eric W. Biederman
2013-01-02 11:26 ` Andrew Cooper [this message]
2013-01-02 11:26 ` [Xen-devel] " Andrew Cooper
2013-01-02 11:26 ` Andrew Cooper
2013-01-02 11:47 ` Eric W. Biederman
2013-01-02 11:47 ` Eric W. Biederman
2013-01-02 11:47 ` Eric W. Biederman
2013-01-03 9:31 ` Jan Beulich
2013-01-03 9:31 ` Jan Beulich
2013-01-03 9:31 ` Jan Beulich
2013-01-04 14:22 ` Daniel Kiper
2013-01-04 14:22 ` Daniel Kiper
2013-01-04 14:22 ` Daniel Kiper
2013-01-04 14:34 ` Konrad Rzeszutek Wilk
2013-01-04 14:34 ` Konrad Rzeszutek Wilk
2013-01-04 14:34 ` Konrad Rzeszutek Wilk
2013-01-04 14:34 ` Ian Campbell
2013-01-04 14:34 ` Ian Campbell
2013-01-04 14:34 ` Ian Campbell
2013-01-04 14:38 ` David Vrabel
2013-01-04 14:38 ` David Vrabel
2013-01-04 17:01 ` Daniel Kiper
2013-01-04 17:01 ` Daniel Kiper
2013-01-04 17:01 ` Daniel Kiper
2013-01-10 14:19 ` David Vrabel
2013-01-10 14:19 ` David Vrabel
2013-01-10 14:19 ` David Vrabel
2013-01-11 13:22 ` Daniel Kiper
2013-01-11 13:22 ` Daniel Kiper
2013-01-11 13:22 ` Daniel Kiper
2013-01-11 15:22 ` David Vrabel
2013-01-11 15:22 ` David Vrabel
2013-01-11 15:22 ` David Vrabel
2013-01-11 17:34 ` Daniel Kiper
2013-01-11 17:34 ` Daniel Kiper
2013-01-11 17:34 ` Daniel Kiper
2013-01-11 20:05 ` Eric W. Biederman
2013-01-11 20:05 ` Eric W. Biederman
2013-01-11 20:05 ` Eric W. Biederman
2013-01-04 14:38 ` David Vrabel
2013-01-04 14:41 ` Jan Beulich
2013-01-04 14:41 ` Jan Beulich
2013-01-04 14:41 ` Jan Beulich
2013-01-04 17:07 ` Daniel Kiper
2013-01-04 17:07 ` Daniel Kiper
2013-01-04 17:07 ` Daniel Kiper
2013-01-04 19:11 ` Konrad Rzeszutek Wilk
2013-01-04 19:11 ` Konrad Rzeszutek Wilk
2013-01-04 19:11 ` Konrad Rzeszutek Wilk
2013-01-07 10:25 ` Ian Campbell
2013-01-07 10:25 ` Ian Campbell
2013-01-07 10:25 ` Ian Campbell
2013-01-07 10:46 ` Andrew Cooper
2013-01-07 10:46 ` Andrew Cooper
2013-01-07 10:46 ` Andrew Cooper
2013-01-07 10:54 ` Ian Campbell
2013-01-07 10:54 ` Ian Campbell
2013-01-07 10:54 ` Ian Campbell
2013-01-07 12:34 ` Daniel Kiper
2013-01-07 12:34 ` Daniel Kiper
2013-01-07 12:34 ` Daniel Kiper
2013-01-07 13:49 ` Ian Campbell
2013-01-07 13:49 ` Ian Campbell
2013-01-07 13:49 ` Ian Campbell
2013-01-11 13:47 ` Daniel Kiper
2013-01-11 13:47 ` Daniel Kiper
2013-01-11 13:47 ` Daniel Kiper
2013-01-07 16:20 ` Konrad Rzeszutek Wilk
2013-01-07 16:20 ` Konrad Rzeszutek Wilk
2013-01-07 16:20 ` Konrad Rzeszutek Wilk
2013-01-11 4:16 ` Eric W. Biederman
2013-01-11 4:16 ` Eric W. Biederman
2013-01-11 4:16 ` Eric W. Biederman
2013-01-11 16:55 ` Konrad Rzeszutek Wilk
2013-01-11 16:55 ` Konrad Rzeszutek Wilk
2013-01-11 16:55 ` Konrad Rzeszutek Wilk
2013-01-11 20:26 ` H. Peter Anvin
2013-01-11 20:26 ` H. Peter Anvin
2013-01-11 20:26 ` H. Peter Anvin
2013-01-11 20:43 ` Vivek Goyal
2013-01-11 20:43 ` Vivek Goyal
2013-01-11 20:43 ` Vivek Goyal
2013-01-11 20:26 ` Eric W. Biederman
2013-01-11 20:26 ` Eric W. Biederman
2013-01-11 20:26 ` Eric W. Biederman
2013-01-11 20:52 ` Vivek Goyal
2013-01-11 20:52 ` Vivek Goyal
2013-01-11 20:52 ` Vivek Goyal
2013-01-11 21:03 ` H. Peter Anvin
2013-01-11 21:03 ` H. Peter Anvin
2013-01-11 21:03 ` H. Peter Anvin
2013-01-11 21:08 ` Vivek Goyal
2013-01-11 21:08 ` Vivek Goyal
2013-01-11 21:08 ` Vivek Goyal
2013-01-11 21:14 ` H. Peter Anvin
2013-01-11 21:14 ` H. Peter Anvin
2013-01-11 21:14 ` H. Peter Anvin
2013-01-02 15:27 ` Ian Campbell
2013-01-02 15:27 ` Ian Campbell
2013-01-02 15:27 ` Ian Campbell
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