[RFC PATCH 04/17] COLO info: use colo info to tell migration target colo is enabled

migrate colo info to migration target to tell the target colo is enabled. Signed-off-by: Yang Hongyang --- Makefile.objs | 1 + include/migration/migration-colo.h | 3 ++ migration-colo-comm.c | 68 ++ vl.c

[RFC PATCH 06/17] COLO restore: integrate COLO checkpointed restore into qemu restore

enter colo checkpointed restore loop after live migration. Signed-off-by: Yang Hongyang --- include/migration/migration-colo.h | 6 ++ migration-colo-comm.c | 10 ++ migration-colo.c | 22 ++ migration.c| 3

[RFC PATCH 13/17] COLO ctl: implement colo save

implement colo save Signed-off-by: Yang Hongyang --- migration-colo.c | 44 ++-- 1 file changed, 38 insertions(+), 6 deletions(-) diff --git a/migration-colo.c b/migration-colo.c index a708872..03ac157 100644 --- a/migration-colo.c +++ b/migration-colo.c

[RFC PATCH 17/17] HACK: trigger checkpoint every 500ms

Because COLO Agent is under development. We add this hack for test purpose. Trigger checkpoint every 500ms so that we can test the process of COLO save/restore. NOTE: This is only a hack, and will be removed at last. Signed-off-by: Yang Hongyang --- migration-colo.c | 14 +- 1

[RFC PATCH 11/17] COLO ctl: implement colo checkpoint protocol

ide may go forward a lot when this side just receives the sync-point. Signed-off-by: Yang Hongyang --- migration-colo.c | 268 +-- 1 file changed, 262 insertions(+), 6 deletions(-) diff --git a/migration-colo.c b/migration-colo.c index 26

[RFC PATCH 14/17] COLO ctl: implement colo restore

implement colo restore Signed-off-by: Yang Hongyang --- migration-colo.c | 43 +++ 1 file changed, 35 insertions(+), 8 deletions(-) diff --git a/migration-colo.c b/migration-colo.c index 03ac157..8596845 100644 --- a/migration-colo.c +++ b/migration

[RFC PATCH 08/17] COLO: disable qdev hotplug

COLO do not support qdev hotplug migration, disable it. Signed-off-by: Yang Hongyang --- migration-colo.c | 12 1 file changed, 12 insertions(+) diff --git a/migration-colo.c b/migration-colo.c index b90d9b6..f295e56 100644 --- a/migration-colo.c +++ b/migration-colo.c @@ -12,6

[RFC PATCH 16/17] COLO ram cache: implement colo ram cache on slaver

t was both dirty on PVM and SVM since last checkpoint). Signed-off-by: Yang Hongyang --- arch_init.c| 154 - include/exec/cpu-all.h | 1 + include/migration/migration-colo.h | 3 + migration-colo.c | 4

[RFC PATCH 15/17] COLO save: reuse migration bitmap under colo checkpoint

reuse migration bitmap under colo checkpoint, only send dirty pages per-checkpoint. Signed-off-by: Yang Hongyang --- arch_init.c| 20 +++- include/migration/migration-colo.h | 2 ++ migration-colo.c | 6 ++ stubs/migration-colo.c

[RFC PATCH 03/17] COLO migration: add a migration capability 'colo'

Add a migration capability 'colo'. If this capability is on, The migration will never end, and the VM will be continuously checkpointed. Signed-off-by: Yang Hongyang --- include/qapi/qmp/qerror.h | 3 +++ migration.c | 6 ++ qapi-schema.json | 5 - 3 fil

[RFC PATCH 02/17] COLO: introduce an api colo_supported() to indicate COLO support

introduce an api colo_supported() to indicate COLO support, returns true if colo supported(configured with --enable-colo). Signed-off-by: Yang Hongyang --- Makefile.objs | 1 + include/migration/migration-colo.h | 18 ++ migration-colo.c

[RFC PATCH 07/17] COLO buffer: implement colo buffer as well as QEMUFileOps based on it

side's stat. On restore side: all migration data was read into colo buffer first, then load data from the buffer: If network error happens while data transmission, the slaver can still functinal because the migration data are not yet loaded. Signed-off-by: Yang Hongyang --- migration-colo.c

[RFC PATCH 10/17] COLO ctl: introduce is_slave() and is_master()

is_slaver is to determine whether the QEMU instance is a slaver(migration target) at runtime. is_master is to determine whether the QEMU instance is a master(migration starter) at runtime. This 2 APIs will be used later. Signed-off-by: Yang Hongyang --- migration-colo.c | 11 +++ 1 file

[RFC PATCH 12/17] COLO ctl: add a RunState RUN_STATE_COLO

Guest will enter this state when paused to save/resore VM state under colo checkpoint. Signed-off-by: Yang Hongyang --- qapi-schema.json | 4 +++- vl.c | 8 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/qapi-schema.json b/qapi-schema.json index 807f5a2

[RFC PATCH 05/17] COLO save: integrate COLO checkpointed save into qemu migration

Integrate COLO checkpointed save flow into qemu migration. Add a migrate state: MIG_STATE_COLO, enter this migrate state after the first live migration successfully finished. Create a colo thread to do the checkpointed save. Signed-off-by: Yang Hongyang --- include/migration/migration

[RFC PATCH 09/17] COLO ctl: implement API's that communicate with colo agent

We use COLO agent to compare the packets returned by Primary VM and Secondary VM, and decide whether to start a checkpoint according to some rules. It is a linux kernel module for host. COLO controller communicate with the agent through ioctl(). Signed-off-by: Yang Hongyang --- migration-colo.c

[RFC PATCH 00/17] COarse-grain LOck-stepping(COLO) Virtual Machines for Non-stop Service

two runing VMs, whenever you make changes to PVM, SVM will be synced to PVM's state. TODO list: 1. failover 2. nic replication 3. disk replication[COLO Disk manager] Any comments/feedbacks are warmly welcomed. Thanks, Yang Yang Hongyang (17): configure: add CONFIG_COLO to switch COLO su

[RFC PATCH 01/17] configure: add CONFIG_COLO to switch COLO support

./configure --enable-colo/--disable-colo to switch COLO support on/off. COLO support is off by default. Signed-off-by: Yang Hongyang --- configure | 14 ++ 1 file changed, 14 insertions(+) diff --git a/configure b/configure index f7685b5..4071943 100755 --- a/configure +++ b