Ping?
On 02/28/18 15:25 +0800, Haozhong Zhang wrote:
> QEMU writes to vNVDIMM backends in the vNVDIMM label emulation and
> live migration. If the backend is on the persistent memory, QEMU needs
> to take proper operations to ensure its writes persistent on the
> persistent memory. Otherwise, a host power failure may result in the
> loss the guest data on the persistent memory.
>
> This v3 patch series is based on Marcel's patch "mem: add share
> parameter to memory-backend-ram" [1] because of the changes in patch 1.
>
> [1] https://lists.gnu.org/archive/html/qemu-devel/2018-02/msg03858.html
>
> Previous versions can be found at
> v3: https://lists.gnu.org/archive/html/qemu-devel/2018-02/msg04365.html
> v2: https://lists.gnu.org/archive/html/qemu-devel/2018-02/msg01579.html
> v1: https://lists.gnu.org/archive/html/qemu-devel/2017-12/msg05040.html
>
> Changes in v4:
> * (Patch 2) Fix compilation errors found by patchew.
>
> Changes in v3:
> * (Patch 5) Add a is_pmem flag to ram_handle_compressed() and handle
> PMEM writes in it, so we don't need the _common function.
> * (Patch 6) Expose qemu_get_buffer_common so we can remove the
> unnecessary qemu_get_buffer_to_pmem wrapper.
> * (Patch 8) Add a is_pmem flag to xbzrle_decode_buffer() and handle
> PMEM writes in it, so we can remove the unnecessary
> xbzrle_decode_buffer_{common, to_pmem}.
> * Move libpmem stubs to stubs/pmem.c and fix the compilation failures
> of test-{xbzrle,vmstate}.c.
>
> Changes in v2:
> * (Patch 1) Use a flags parameter in file ram allocation functions.
> * (Patch 2) Add a new option 'pmem' to hostmem-file.
> * (Patch 3) Use libpmem to operate on the persistent memory, rather
> than re-implementing those operations in QEMU.
> * (Patch 5-8) Consider the write persistence in the migration path.
>
> Haozhong Zhang (8):
> [1/8] memory, exec: switch file ram allocation functions to 'flags'
> parameters
> [2/8] hostmem-file: add the 'pmem' option
> [3/8] configure: add libpmem support
> [4/8] mem/nvdimm: ensure write persistence to PMEM in label emulation
> [5/8] migration/ram: ensure write persistence on loading zero pages to PMEM
> [6/8] migration/ram: ensure write persistence on loading normal pages to
> PMEM
> [7/8] migration/ram: ensure write persistence on loading compressed pages
> to PMEM
> [8/8] migration/ram: ensure write persistence on loading xbzrle pages to
> PMEM
>
> backends/hostmem-file.c | 27 +++++++++++++++++++-
> configure | 35 ++++++++++++++++++++++++++
> docs/nvdimm.txt | 14 +++++++++++
> exec.c | 20 ++++++++++++---
> hw/mem/nvdimm.c | 9 ++++++-
> include/exec/memory.h | 12 +++++++--
> include/exec/ram_addr.h | 28 +++++++++++++++++++--
> include/migration/qemu-file-types.h | 2 ++
> include/qemu/pmem.h | 27 ++++++++++++++++++++
> memory.c | 8 +++---
> migration/qemu-file.c | 29 ++++++++++++++--------
> migration/ram.c | 49
> +++++++++++++++++++++++++++----------
> migration/ram.h | 2 +-
> migration/rdma.c | 2 +-
> migration/xbzrle.c | 8 ++++--
> migration/xbzrle.h | 3 ++-
> numa.c | 2 +-
> qemu-options.hx | 9 ++++++-
> stubs/Makefile.objs | 1 +
> stubs/pmem.c | 37 ++++++++++++++++++++++++++++
> tests/Makefile.include | 4 +--
> tests/test-xbzrle.c | 4 +--
> 22 files changed, 285 insertions(+), 47 deletions(-)
> create mode 100644 include/qemu/pmem.h
> create mode 100644 stubs/pmem.c
>
> --
> 2.14.1
>
