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[PATCH V2 0/8] Optimize VM's downtime while do checkpoint in COLO
From: |
zhanghailiang |
Subject: |
[PATCH V2 0/8] Optimize VM's downtime while do checkpoint in COLO |
Date: |
Mon, 24 Feb 2020 14:54:06 +0800 |
This series try to tries to reduce VM's pause time while do checkpoint in COLO
state.
Here, we use two methods to reduce the downtime during COLO stage:
The first one is to reduce the time of backup PVM's memory into cache,
Instread of doing this once time backup all PVM's memory when VM is stopped, we
backup
them during the live migration time.
Secondly, we reduced the total number of dirty pages while do checkpoint with
VM been paused,
instead of sending all dirty pages while VM been pause, it sends part of dirty
pages
during the gap time of two checkpoints when SVM and PVM are running.
V1 -> V2:
- Fix tested problem found by Daniel Cho
- Fix a degradation after rebase to master (first patch)
Please review, thanks.
Hailiang Zhang (8):
migration: fix COLO broken caused by a previous commit
migration/colo: wrap incoming checkpoint process into new helper
savevm: Don't call colo_init_ram_cache twice
COLO: Optimize memory back-up process
ram/colo: only record bitmap of dirty pages in COLO stage
migration: recognize COLO as part of activating process
COLO: Migrate dirty pages during the gap of checkpointing
migration/colo: Only flush ram cache while do checkpoint
migration/colo.c | 337 +++++++++++++++++++++++++----------------
migration/migration.c | 7 +-
migration/migration.h | 1 +
migration/ram.c | 78 +++++++---
migration/ram.h | 2 +
migration/trace-events | 1 +
qapi/migration.json | 4 +-
7 files changed, 269 insertions(+), 161 deletions(-)
--
2.21.0
- [PATCH V2 0/8] Optimize VM's downtime while do checkpoint in COLO,
zhanghailiang <=
- [PATCH V2 1/8] migration: fix COLO broken caused by a previous commit, zhanghailiang, 2020/02/24
- [PATCH V2 5/8] ram/colo: only record bitmap of dirty pages in COLO stage, zhanghailiang, 2020/02/24
- [PATCH V2 3/8] savevm: Don't call colo_init_ram_cache twice, zhanghailiang, 2020/02/24
- [PATCH V2 2/8] migration/colo: wrap incoming checkpoint process into new helper, zhanghailiang, 2020/02/24
- [PATCH V2 6/8] migration: recognize COLO as part of activating process, zhanghailiang, 2020/02/24
- [PATCH V2 8/8] migration/colo: Only flush ram cache while do checkpoint, zhanghailiang, 2020/02/24
- [PATCH V2 7/8] COLO: Migrate dirty pages during the gap of checkpointing, zhanghailiang, 2020/02/24