The first patch avoid spuriously returning 1 [*] when zero-copy flush is
attempted before any buffer was sent using MSG_ZEROCOPY.
[*] zero-copy not being used, even though it's enabled and supported
by kernel
The second patch introduces a new migration stat
(dirty-sync-missed-zero-copy) that will be used to keep track of [*].
The third patch keeps track of how many zero-copy flushes retured 1 [*]
Changes since v3:
- Patch#1: Also checks if no packet was queued after the last flush
- Patch#2: Improve dirty-sync-missed-zero-copy doc and hmp print message
Changes since v2:
- Documentation release number changed from 7.2 to 7.1
- migration stat renamed from zero-copy-copied to
dirty-sync-missed-zero-copy
- Updated documentation to make it more user-friendly
Changes since v1:
- Idea of using a warning replaced by using a migration stat counter
Leonardo Bras (3):
QIOChannelSocket: Fix zero-copy flush returning code 1 when nothing
sent
Add dirty-sync-missed-zero-copy migration stat
migration/multifd: Report to user when zerocopy not working
qapi/migration.json | 7 ++++++-
migration/ram.h | 2 ++
io/channel-socket.c | 8 +++++++-
migration/migration.c | 2 ++
migration/multifd.c | 2 ++
migration/ram.c | 5 +++++
monitor/hmp-cmds.c | 5 +++++
7 files changed, 29 insertions(+), 2 deletions(-)
--
2.37.0
