[Qemu-devel] [PATCH v3 0/6] Introduce bit-based phys_ram_dirty, and bit-based dirty page checker.

[Yoshiaki Tamura]

The dirty and non-dirty pages are checked one by one.  When most of the memory
is not dirty, checking the dirty and non-dirty pages by multiple page size
should be much faster than checking them one by one.  We introduced bit-based
phys_ram_dirty for VGA, CODE, MIGRATION, MASTER, and
cpu_physical_memory_get_dirty_range() for this purpose.

Changes from v2 to v3 are:

- Change FLAGS value to (1,2,4,8), and add IDX (0,1,2,3)
- Use ffs to convert FLAGS to IDX.
- Add a helper function which takes IDX.
- Change the behavior of MASTER as a buffer.
- Change dirty bitmap access to a loop.
- Add brace after if ()
- Move some macros to qemu-common.h.

Yoshiaki Tamura (6):
  Modify DIRTY_FLAG value and DIRTY_IDX introduce to use as indexes of
    bit-based phys_ram_dirty.
  Introduce bit-based phys_ram_dirty for VGA, CODE, MIGRATION and
    MASTER.
  Modifies wrapper functions for byte-based phys_ram_dirty bitmap to
    bit-based     phys_ram_dirty bitmap.
  Introduce cpu_physical_memory_get_dirty_range().
  Use cpu_physical_memory_set_dirty_range() to update phys_ram_dirty.
  Use cpu_physical_memory_get_dirty_range() to check multiple dirty
    pages.

 arch_init.c   |   54 ++++++++++++++---------
 bswap.h       |    2 +
 cpu-all.h     |  131 ++++++++++++++++++++++++++++++++++++++++++++++++--------
 exec.c        |   83 ++++++++++++++++++++++++++++++++++--
 kvm-all.c     |   33 +++++++--------
 qemu-common.h |    3 +
 6 files changed, 243 insertions(+), 63 deletions(-)