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Re: [Qemu-devel] [RFC][PATCT 0/5 v2] dump memory when host pci device is
Re: [Qemu-devel] [RFC][PATCT 0/5 v2] dump memory when host pci device is used by guest
Wed, 14 Dec 2011 10:43:36 +0800
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At 12/13/2011 08:55 PM, Jan Kiszka Write:
> On 2011-12-09 08:57, Wen Congyang wrote:
>> Hi, all
>> 'virsh dump' can not work when host pci device is used by guest. We have
>> discussed this issue here:
>> We have determined to introduce a new command dump to dump memory. The core
>> file's format can be elf.
>> 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
>> is elf64 format. You should use the gdb which is built with
>> Changes from v1 to v2:
>> 1. fix virt addr in the vmcore.
>> Wen Congyang (5):
>> 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
>> introduce a new monitor command 'dump' to dump guest's memory
>> Makefile.target | 9 +-
>> cpu-all.h | 10 +
>> cpu-common.h | 1 +
>> dump.c | 722
>> dump.h | 6 +
>> exec.c | 20 ++
>> hmp-commands.hx | 16 ++
>> memory_mapping.c | 183 +++++++++++++
>> memory_mapping.h | 30 ++
>> monitor.c | 3 +
>> qmp-commands.hx | 24 ++
>> target-i386/helper.c | 239 +++++++++++++++++
>> 12 files changed, 1259 insertions(+), 4 deletions(-)
>> create mode 100644 dump.c
>> create mode 100644 dump.h
>> create mode 100644 memory_mapping.c
>> create mode 100644 memory_mapping.h
> A general remark regarding code organization: Please factor out the
> target specific bits and push them into target-*/dump.[ch] or whatever
> appropriate file in that folder. Ugly #ifdefs should be avoided in
> generic code as far as possible.
OK. I will fix it. Thanks for pointing it out.
Re: [Qemu-devel] [RFC][PATCT 0/5 v2] dump memory when host pci device is used by guest, Jan Kiszka, 2011/12/13
- [Qemu-devel] [RFC][PATCH 3/5 v2] target-i386: implement cpu_get_memory_mapping(), (continued)
- Re: [Qemu-devel] [RFC][PATCT 0/5 v2] dump memory when host pci device is used by guest,
Wen Congyang <=