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Re: [Qemu-devel] [RFC][PATCT 0/14 v4] dump memory when host pci device i
From: |
Jan Kiszka |
Subject: |
Re: [Qemu-devel] [RFC][PATCT 0/14 v4] dump memory when host pci device is used by guest |
Date: |
Tue, 10 Jan 2012 10:41:24 +0100 |
User-agent: |
Mozilla/5.0 (X11; U; Linux i686 (x86_64); de; rv:1.8.1.12) Gecko/20080226 SUSE/2.0.0.12-1.1 Thunderbird/2.0.0.12 Mnenhy/0.7.5.666 |
On 2012-01-10 08:44, Wen Congyang wrote:
> Hi, Jan Kiszka
> Do you have any time to review this patchset?
Will try to find some.
BTW, the title of this cover letter is a bit misleading. This series is
about introducing a new, dedicated memory dump mechanism.
Jan
>
> Thanks
> Wen Congyang
>
> At 01/04/2012 01:44 PM, Wen Congyang Wrote:
>> Hi, all
>>
>> 'virsh dump' can not work when host pci device is used by guest. We have
>> discussed this issue here:
>> http://lists.nongnu.org/archive/html/qemu-devel/2011-10/msg00736.html
>>
>> We have determined to introduce a new command dump to dump memory. The core
>> file's format can be elf.
>>
>> Note:
>> 1. The guest should be x86 or x86_64. The other arch is not supported.
>> 2. If you use old gdb, gdb may crash. I use gdb-7.3.1, and it does not crash.
>> 3. If the OS is in the second kernel, gdb may not work well, and crash can
>> work by specifying '--machdep phys_addr=xxx' in the command line. The
>> reason is that the second kernel will update the page table, and we can
>> not get the page table for the first kernel.
>> 4. If the guest OS is 32 bit and the memory size is larger than 4G, the
>> vmcore
>> is elf64 format. You should use the gdb which is built with
>> --enable-64-bit-bfd.
>>
>> Change from v3 to v4:
>> 1. support it to run asynchronously
>> 2. add API to cancel dumping and query dumping progress
>> 3. add API to control dumping speed
>> 4. auto cancel dumping when the user resumes vm, and the status is failed.
>>
>> Change from v2 to v3:
>> 1. address Jan Kiszka's comment
>>
>> Changes from v1 to v2:
>> 1. fix virt addr in the vmcore.
>>
>> Wen Congyang (14):
>> Add API to create memory mapping list
>> Add API to check whether a physical address is I/O address
>> target-i386: implement cpu_get_memory_mapping()
>> Add API to get memory mapping
>> target-i386: Add API to write elf notes to core file
>> target-i386: Add API to add extra memory mapping
>> target-i386: add API to get dump info
>> introduce a new monitor command 'dump' to dump guest's memory
>> run dump at the background
>> support detached dump
>> support to cancel the current dumping
>> support to set dumping speed
>> support to query dumping status
>> auto cancel dumping after vm state is changed to run
>>
>> Makefile.target | 11 +-
>> cpu-all.h | 18 +
>> cpu-common.h | 2 +
>> dump.c | 796
>> +++++++++++++++++++++++++++++++++++++++++++++++
>> dump.h | 14 +
>> exec.c | 20 ++
>> hmp-commands.hx | 47 +++
>> hmp.c | 24 ++
>> hmp.h | 3 +
>> memory_mapping.c | 185 +++++++++++
>> memory_mapping.h | 39 +++
>> monitor.c | 10 +
>> qapi-schema.json | 54 ++++
>> qmp-commands.hx | 117 +++++++
>> target-i386/arch-dump.c | 574 ++++++++++++++++++++++++++++++++++
>> 15 files changed, 1909 insertions(+), 5 deletions(-)
>> create mode 100644 dump.c
>> create mode 100644 dump.h
>> create mode 100644 memory_mapping.c
>> create mode 100644 memory_mapping.h
>> create mode 100644 target-i386/arch-dump.c
>>
>>
>
--
Siemens AG, Corporate Technology, CT T DE IT 1
Corporate Competence Center Embedded Linux
- Re: [Qemu-devel] [RFC][PATCH 08/14 v4] introduce a new monitor command 'dump' to dump guest's memory, (continued)
[Qemu-devel] [RFC][PATCH 09/14 v4] run dump at the background, Wen Congyang, 2012/01/04
[Qemu-devel] [RFC][PATCH 10/14 v4] support detached dump, Wen Congyang, 2012/01/04
[Qemu-devel] [RFC][PATCH 11/14 v4] support to cancel the current dumping, Wen Congyang, 2012/01/04
[Qemu-devel] [RFC][PATCH 12/14 v4] support to set dumping speed, Wen Congyang, 2012/01/04
[Qemu-devel] [RFC][PATCH 13/14 v4] support to query dumping status, Wen Congyang, 2012/01/04
[Qemu-devel] [RFC][PATCH 14/14 v4] auto cancel dumping after vm state is changed to run, Wen Congyang, 2012/01/04
Re: [Qemu-devel] [RFC][PATCT 0/14 v4] dump memory when host pci device is used by guest, Wen Congyang, 2012/01/10
- Re: [Qemu-devel] [RFC][PATCT 0/14 v4] dump memory when host pci device is used by guest,
Jan Kiszka <=