From: Xiao Guangrong <xiaoguangr...@tencent.com>

Changelog in v3:

Thanks to Peter's comments, the changes in this version are:
1) make compress-wait-thread be true on default to keep current behavior
2) save the compressed-size instead of reduced size and fix calculating
   compression ratio
3) fix calculating xbzrle_counters.cache_miss_rate and
   compression_counters.busy_rate


Xiao Guangrong (10):
  migration: do not wait for free thread
  migration: fix counting normal page for compression
  migration: introduce save_zero_page_to_file
  migration: drop the return value of do_compress_ram_page
  migration: move handle of zero page to the thread
  migration: hold the lock only if it is really needed
  migration: do not flush_compressed_data at the end of each iteration
  migration: handle the error condition properly
  migration: fix calculating xbzrle_counters.cache_miss_rate
  migration: show the statistics of compression

 hmp.c                 |  21 ++++
 include/qemu/queue.h  |   1 +
 migration/migration.c |  33 ++++++
 migration/migration.h |   1 +
 migration/ram.c       | 283 +++++++++++++++++++++++++++++++++++++-------------
 migration/ram.h       |   1 +
 qapi/migration.json   |  49 +++++++--
 7 files changed, 308 insertions(+), 81 deletions(-)

-- 
2.14.4


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