RFC dump memory when host pci device is used by guest
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b4 am [email protected]Versions newest first · linked by author and title
- v4 RFC Latest14 patches 6 repliesIn review
- v3 RFC8 patches 3 repliesSuperseded
- v2 RFC4 of 5 patches 10 repliesSuperseded
Earlier versions · 1
| Version | Posted | Patches | Replies | Status |
|---|---|---|---|---|
| v1 RFC | 1 patch | 5 replies | Superseded |
Changes in v4 from the cover letter
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.
Patches in v4 No applies recorded yet
| # | Subject and files | Size | Replies | Applied |
|---|---|---|---|---|
| 1/14 | Add API to create memory mapping listMakefile.target memory_mapping.c memory_mapping.h | +169 | 0 replies | |
| 2/14 | Add API to check whether a physical address is I/O addresscpu-common.h exec.c | +22 | 0 replies | |
| 3/14 | target-i386: implement cpu_get_memory_mapping()Makefile.target cpu-all.h target-i386/ | +262 | 0 replies | |
| 4/14 | Add API to get memory mappingmemory_mapping.c memory_mapping.h | +56 | 0 replies | |
| 5/14 | target-i386: Add API to write elf notes to core filecpu-all.h target-i386/ | +249 | 0 replies | |
| 6/14 | target-i386: Add API to add extra memory mappingcpu-all.h target-i386/ | +45 | 0 replies | |
| 7/14 | target-i386: add API to get dump infocpu-all.h dump.h target-i386/ | +47 | 0 replies | |
| 8/14 | introduce a new monitor command 'dump' to dump guest's memoryMakefile.target dump.c dump.h +3 more | +641 | 4 replies | |
| 9/14 | run dump at the backgrounddump.c | +139 | 0 replies | |
| 10/14 | support detached dumpdump.c hmp-commands.hx qmp-commands.hx | +27 | 0 replies | |
| 11/14 | support to cancel the current dumpingdump.c hmp-commands.hx hmp.c +3 more | +68 | 0 replies | |
| 12/14 | support to set dumping speeddump.c hmp-commands.hx hmp.c +3 more | +71 | 0 replies | |
| 13/14 | support to query dumping statusdump.c hmp-commands.hx hmp.c +4 more | +126 | 0 replies | |
| 14/14 | auto cancel dumping after vm state is changed to rundump.c | +18 | 0 replies |
Reviews trailers per patch
No Reviewed-by, Acked-by or Tested-by trailers for v4 yet.
Cover letter [Qemu-devel] [RFC][PATCT 0/14 v4] dump memory when host pci device is used by guest
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