This patchset is rebased to Juan's latest pull request:
Based-on: <20230202160640.2300-1-quintela@redhat.com>
I can trigger disordered connections with preempt mode postcopy (1 out of a
few attemps), which can cause migration to hang during precopy phase, if
e.g. I set the NIC packet loss rate to 50%.
Patch 1 is IMHO a cleanup that I'd think good to have even without patch
2/3. Patch 3 actually fixes the ordering issue. For each of the patch,
please refer to the commit message and comments in-code.
Any comment welcomed, thanks.
Peter Xu (3):
migration: Rework multi-channel checks on URI
migration: Add a semaphore to count PONGs
migration: Postpone postcopy preempt channel to be after main
migration/migration.c | 121 ++++++++++++++++++++++++++-------------
migration/migration.h | 15 ++++-
migration/multifd.c | 12 +---
migration/postcopy-ram.c | 31 +++++-----
migration/postcopy-ram.h | 4 +-
migration/savevm.c | 6 +-
6 files changed, 117 insertions(+), 72 deletions(-)
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2.37.3