[PATCH v3 0/8] migration: Postcopy cleanup on ram disgard

[Peter Xu]

v3:
- s/disgard/discard/, s/exit/return/ [DavidE]

v2:
- add r-bs for Dave
- move mig_cmd_args reference later than index bound check [Dave]
- use chars in tracepoints instead of number of steps [Dave]
- add one patch for postcopy-run tracing

Some queued patches for ram disgard cleanup, and some debug probes.

QEMU's ram disgard logic is probably a bit hard to predict because we send a
bunch of packets to notify the disgarded ranges rather than sending the bitmap.
The packets to send depending on the bitmap layout.

Initially I thought it could be a problem but in reality it's fine so far per
my initial measurement.  So I'm flushing the cleanup/trace patches out because
I think they're still helpful.

Please have a look, thanks.

Peter Xu (8):
  migration: Drop dead code of ram_debug_dump_bitmap()
  migration: Don't return for postcopy_chunk_hostpages()
  migration: Drop postcopy_chunk_hostpages()
  migration: Do chunk page in postcopy_each_ram_send_discard()
  migration: Drop return code for disgard ram process
  migration: Dump sub-cmd name in loadvm_process_command tp
  migration: Finer grained tracepoints for POSTCOPY_LISTEN
  migration: Tracepoint change in postcopy-run bottom half

 migration/migration.c  |   5 +-
 migration/ram.c        | 103 ++++++-----------------------------------
 migration/ram.h        |   4 +-
 migration/savevm.c     |  24 ++++++++--
 migration/trace-events |   7 ++-
 5 files changed, 38 insertions(+), 105 deletions(-)

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2.32.0