[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-devel] [RFC PATCH v4 00/28] COarse-grain LOck-stepping(COLO) V
Re: [Qemu-devel] [RFC PATCH v4 00/28] COarse-grain LOck-stepping(COLO) Virtual Machines for Non-stop Service
Thu, 14 May 2015 20:58:35 +0800
Mozilla/5.0 (Windows NT 6.1; rv:31.0) Gecko/20100101 Thunderbird/31.1.1
On 2015/5/14 20:14, Dr. David Alan Gilbert wrote:
* zhanghailiang (address@hidden) wrote:
This is the 4th version of COLO, here is only COLO frame part, include: VM
failover, proxy API, block replication API, not include block replication.
The block part has been sent by wencongyang:
[RFC PATCH COLO v2 00/13] Block replication for continuous checkpoints
Compared with last version, there aren't too much optimize and new functions.
The main reason is that there is an known issue that still unsolved, we found
some dirty pages which have been missed setting bit in corresponding bitmap.
And it will trigger strange problem in VM.
We hope to resolve it before add more codes.
You can get the newest integrated qemu colo patches from github:
I thought I'd just say I've got the remotes/origin/colo_huawei_v4.7 off Wen's
git running here on one of my pair of machines.
This set of hosts is mostly OK running colo; the proxy module still gets
upset sometimes; but mostly on errors; if the colo-proxy-script fails
during startup, I get RCU stalls; but if the script works, colo normally
works on this setup.
I'm trying to optimize the proxy module codes, and yes, the 'lock' we used in
was a little messy before, and i have finished rewriting the part of
communication between qemu
and proxy, also removing the parameter of xt_PMYCOLO module ...
There are still some further tests need to be done, i will finish it as soon as
I hope to send the next version in next week. And you can test the branch of
Except block part, there is no difference in COLO framework between his branch
and mine. ;)
About how to test COLO, Please reference to the follow link.
Please review and test.
Known issue still unsolved:
(1) Some pages dirtied without setting its corresponding dirty-bitmap.
Previous posted RFC patch series:
1 Optimize the process of checkpoint, shorten the time-consuming:
(Partly done, patch is not include into this series)
1) separate ram and device save/load process to reduce size of extra memory
used during checkpoint
2) live migrate part of dirty pages to slave during sleep time.
2 Add more debug/stat info
(Partly done, patch is not include into this series)
include checkpoint count, proxy discompare count, downtime,
number of live migrated pages, total sent pages, etc.
3 Strengthen failover
4 optimize proxy part, include proxy script.
5 The capability of continuous FT
- New block replication scheme (use image-fleecing for sencondary side)
- Adress some comments from Eric Blake and Dave
- Add commmand colo-set-checkpoint-period to set the time of periodic checkpoint
- Add a delay (100ms) between continuous checkpoint requests to ensure VM
run 100ms at least since last pause.
- use proxy instead of colo agent to compare network packets
- add block replication
- Optimize failover disposal
- handle shutdown
- use QEMUSizedBuffer/QEMUFile as COLO buffer
- colo support is enabled by default
- add nic replication support
- addressed comments from Eric Blake and Dr. David Alan Gilbert
- implement the frame of colo
Wen Congyang (1):
COLO: Add block replication into colo process
configure: Add parameter for configure to enable/disable COLO support
migration: Introduce capability 'colo' to migration
COLO: migrate colo related info to slave
migration: Integrate COLO checkpoint process into migration
migration: Integrate COLO checkpoint process into loadvm
COLO: Implement colo checkpoint protocol
COLO: Add a new RunState RUN_STATE_COLO
QEMUSizedBuffer: Introduce two help functions for qsb
COLO: Save VM state to slave when do checkpoint
COLO RAM: Load PVM's dirty page into SVM's RAM cache temporarily
COLO VMstate: Load VM state into qsb before restore it
arch_init: Start to trace dirty pages of SVM
COLO RAM: Flush cached RAM into SVM's memory
COLO failover: Introduce a new command to trigger a failover
COLO failover: Implement COLO master/slave failover work
COLO failover: Don't do failover during loading VM's state
COLO: Add new command parameter 'colo_nicname' 'colo_script' for net
COLO NIC: Init/remove colo nic devices when add/cleanup tap devices
COLO NIC: Implement colo nic device interface configure()
COLO NIC : Implement colo nic init/destroy function
COLO NIC: Some init work related with proxy module
COLO: Do checkpoint according to the result of net packets comparing
COLO: Improve checkpoint efficiency by do additional periodic
COLO: Add colo-set-checkpoint-period command
COLO NIC: Implement NIC checkpoint and failover
COLO: Disable qdev hotplug when VM is in COLO mode
COLO: Implement shutdown checkpoint
arch_init.c | 199 +++++++-
configure | 14 +
hmp-commands.hx | 30 ++
hmp.c | 14 +
hmp.h | 2 +
include/exec/cpu-all.h | 1 +
include/migration/migration-colo.h | 58 +++
include/migration/migration-failover.h | 22 +
include/migration/migration.h | 3 +
include/migration/qemu-file.h | 3 +-
include/net/colo-nic.h | 25 +
include/net/net.h | 4 +
include/sysemu/sysemu.h | 3 +
migration/Makefile.objs | 2 +
migration/colo-comm.c | 80 ++++
migration/colo-failover.c | 48 ++
migration/colo.c | 809 +++++++++++++++++++++++++++++++++
migration/migration.c | 60 ++-
migration/qemu-file-buf.c | 58 +++
net/Makefile.objs | 1 +
net/colo-nic.c | 438 ++++++++++++++++++
net/tap.c | 45 +-
qapi-schema.json | 42 +-
qemu-options.hx | 10 +-
qmp-commands.hx | 41 ++
savevm.c | 2 +-
scripts/colo-proxy-script.sh | 97 ++++
stubs/Makefile.objs | 1 +
stubs/migration-colo.c | 58 +++
vl.c | 36 +-
30 files changed, 2178 insertions(+), 28 deletions(-)
create mode 100644 include/migration/migration-colo.h
create mode 100644 include/migration/migration-failover.h
create mode 100644 include/net/colo-nic.h
create mode 100644 migration/colo-comm.c
create mode 100644 migration/colo-failover.c
create mode 100644 migration/colo.c
create mode 100644 migration/colo.c.
create mode 100644 net/colo-nic.c
create mode 100755 scripts/colo-proxy-script.sh
create mode 100644 stubs/migration-colo.c
Dr. David Alan Gilbert / address@hidden / Manchester, UK