From: Avi Kivity <avi@redhat.com>
To: Dave Anderson <anderson@redhat.com>
Cc: "Richard W.M. Jones" <rjones@redhat.com>,
Jan Kiszka <jan.kiszka@siemens.com>,
qemu-devel <qemu-devel@nongnu.org>,
Luiz Capitulino <lcapitulino@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Subject: Re: [Qemu-devel] [Question] dump memory when host pci device is used by guest
Date: Tue, 25 Oct 2011 15:22:40 +0200 [thread overview]
Message-ID: <4EA6B820.7010003@redhat.com> (raw)
In-Reply-To: <1b1504e0-bdc0-4c5c-8c65-38eed168ac17@zmail05.collab.prod.int.phx2.redhat.com>
On 10/25/2011 03:18 PM, Dave Anderson wrote:
> >
> > Crash uses a heuristic based on the IDT base to identify the base from
> > migrate-to-file output. It also needs CR3 in order to read from virtual
> > address.
>
> Just to clarify -- the need for the IDT base and cr3 is *only* true for
> KVM dumps using the "savevm" format.
>
> With ELF-format kdumps, the phys_base is simply determined from the PT_LOAD
> segment that describes the kernel's __START_KERNEL_map region. I don't know
> why that couldn't be done in this proposed case.
>
>
kvm has no idea where the kernel (if any) is running. The dump is taken
without any guest cooperation.
--
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
next prev parent reply other threads:[~2011-10-25 13:22 UTC|newest]
Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-07 9:46 [Qemu-devel] [Question] dump memory when host pci device is used by guest Wen Congyang
2011-10-07 10:16 ` Jan Kiszka
2011-10-07 12:25 ` Wen Congyang
2011-10-07 12:56 ` Jan Kiszka
2011-10-07 14:05 ` Wen Congyang
2011-10-07 15:06 ` Jan Kiszka
2011-10-10 9:00 ` Daniel P. Berrange
2011-10-08 15:16 ` Richard W.M. Jones
2011-10-09 8:49 ` Jan Kiszka
2011-10-09 10:23 ` Richard W.M. Jones
2011-10-09 10:26 ` Jan Kiszka
2011-10-10 2:21 ` Wen Congyang
2011-10-10 6:52 ` Jan Kiszka
2011-10-10 6:59 ` Wen Congyang
2011-10-10 7:01 ` Jan Kiszka
2011-10-10 7:17 ` Wen Congyang
2011-10-10 7:22 ` Jan Kiszka
2011-10-10 7:47 ` Wen Congyang
2011-10-10 7:48 ` Jan Kiszka
2011-10-10 8:28 ` Wen Congyang
2011-10-10 7:08 ` Alexander Graf
2011-10-10 7:10 ` Jan Kiszka
2011-10-10 9:02 ` Daniel P. Berrange
2011-10-10 9:34 ` Jan Kiszka
2011-10-11 2:27 ` Wen Congyang
2011-10-18 7:15 ` Wen Congyang
2011-10-18 7:52 ` Jan Kiszka
2011-10-18 7:58 ` Wen Congyang
2011-10-18 8:19 ` Jan Kiszka
2011-10-18 8:25 ` Wen Congyang
2011-10-18 8:26 ` Jan Kiszka
2011-10-18 8:31 ` Wen Congyang
2011-10-18 8:31 ` Jan Kiszka
2011-10-18 8:34 ` Richard W.M. Jones
2011-10-18 8:36 ` Jan Kiszka
2011-10-18 8:39 ` Jan Kiszka
2011-10-18 10:41 ` Paolo Bonzini
2011-10-18 10:42 ` Christoph Hellwig
2011-10-18 12:47 ` Jan Kiszka
2011-10-18 13:08 ` Christoph Hellwig
2011-10-18 13:13 ` Jan Kiszka
2011-10-18 10:47 ` Jan Kiszka
2011-10-18 13:30 ` Richard W.M. Jones
2011-10-18 13:34 ` Jan Kiszka
2011-10-18 9:43 ` Wen Congyang
2011-10-18 10:28 ` Jan Kiszka
2011-10-18 13:51 ` Wen Congyang
2011-10-18 13:55 ` Jan Kiszka
2011-10-18 14:17 ` Wen Congyang
2011-10-18 14:21 ` Jan Kiszka
2011-10-18 15:04 ` Wen Congyang
2011-10-18 15:27 ` Jan Kiszka
2011-10-19 1:23 ` Wen Congyang
2011-10-19 2:04 ` KAMEZAWA Hiroyuki
2011-10-19 11:40 ` Jan Kiszka
2011-10-20 1:22 ` Wen Congyang
2011-10-20 9:41 ` Jan Kiszka
2011-10-20 10:03 ` Wen Congyang
2011-10-21 7:11 ` Jan Kiszka
2011-10-21 7:50 ` Wen Congyang
2011-10-21 13:02 ` Dave Anderson
2011-10-21 13:16 ` Jan Kiszka
2011-10-21 14:12 ` Richard W.M. Jones
2011-10-24 2:25 ` Wen Congyang
2011-10-24 14:25 ` Dave Anderson
2011-10-24 15:01 ` Avi Kivity
2011-10-24 15:25 ` Dave Anderson
2011-10-24 15:30 ` Avi Kivity
2011-10-24 15:58 ` Dave Anderson
2011-10-25 1:37 ` Wen Congyang
2011-10-25 7:37 ` Jan Kiszka
2011-10-25 8:06 ` Wen Congyang
2011-10-25 8:23 ` Avi Kivity
2011-10-25 8:35 ` Paolo Bonzini
2011-10-25 8:52 ` Avi Kivity
2011-10-25 8:56 ` Paolo Bonzini
2011-10-25 9:19 ` Jan Kiszka
2011-10-25 13:18 ` Dave Anderson
2011-10-25 13:22 ` Avi Kivity [this message]
2011-10-18 7:58 ` Daniel P. Berrange
2011-10-18 8:17 ` Jan Kiszka
2011-10-18 8:25 ` Jan Kiszka
2011-10-18 8:25 ` Daniel P. Berrange
2011-10-18 8:30 ` Jan Kiszka
2011-10-10 9:08 ` Daniel P. Berrange
2011-10-10 9:10 ` Daniel P. Berrange
2011-10-10 9:34 ` Richard W.M. Jones
2011-10-10 10:17 ` Jan Kiszka
2011-10-10 9:34 ` Jan Kiszka
2011-10-10 10:19 ` Daniel P. Berrange
2011-10-11 2:20 ` Wen Congyang
2011-10-11 6:58 ` Jan Kiszka
2011-10-11 7:13 ` Wen Congyang
2011-10-10 10:21 ` Alon Levy
2011-10-10 10:48 ` Paolo Bonzini
2011-10-10 11:04 ` Daniel P. Berrange
2011-10-10 11:09 ` Paolo Bonzini
2011-10-10 12:00 ` [Qemu-devel] windows crash dump header. was: " Alon Levy
2011-10-10 12:38 ` Paolo Bonzini
2011-10-10 13:47 ` Alon Levy
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