From: "H. Peter Anvin" <hpa@zytor.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Daniel Kiper <daniel.kiper@oracle.com>,
andrew.cooper3@citrix.com, jbeulich@suse.com,
konrad.wilk@oracle.com, mingo@redhat.com, tglx@linutronix.de,
x86@kernel.org, kexec@lists.infradead.org,
linux-kernel@vger.kernel.org,
virtualization@lists.linux-foundation.org,
xen-devel@lists.xensource.com
Subject: Re: [PATCH v2 01/11] kexec: introduce kexec_ops struct
Date: Thu, 22 Nov 2012 09:47:46 -0800 [thread overview]
Message-ID: <50AE6542.3020302@zytor.com> (raw)
In-Reply-To: <87txshx28b.fsf@xmission.com>
The other thing that should be considered here is how utterly
preposterous the notion of doing in-guest crash dumping is in a system
that contains a hypervisor. The reason for kdump is that on bare metal
there are no other options, but in a hypervisor system the right thing
should be for the hypervisor to do the dump (possibly spawning a clean
I/O domain if the I/O domain is necessary to access the media.)
There is absolutely no reason to have a crashkernel sitting around in
each guest, consuming memory, and possibly get corrupt.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
next prev parent reply other threads:[~2012-11-22 18:58 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 [this message]
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 ` [Xen-devel] " Ian Campbell
2012-11-23 11:13 ` 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
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