Stage2 #68
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Stage2 #68
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When probe, we can skip suspend when HA, becasue HA is holding device fd, controller is running and we can proceed. Signed-off-by: Kailiang <kailiangz@nvidia.com>
When lm, we can compare the state of vhost which is get from qemu and the state of controller, if there is no difference, we can go on without any interrupt. Signed-off-by: Kailiang <kailiangz@nvidia.com>
Call virtio compare when device config, this way can cut the downtime of traffic Signed-off-by: Kailiang <kailiangz@nvidia.com>
Move close vhost after probe can save the time cost of probe and let the whole downtime low. Signed-off-by: Kailiang <kailiangz@nvidia.com>
For virtio-blk, if controller is freezed, the pending byte is 0, in order to fix this, always use 8k buffer which is enough for current state size Signed-off-by: Kailiang <kailiangz@nvidia.com>
When probe, there is possiblity backend controller's state is error, we should reset no matter is HA or not. Signed-off-by: Kailiang <kailiangz@nvidia.com>
If run into presetup, this means live migration happened after VFE restart, we can fall back to stage 1 and let the compare work done by controller side Signed-off-by: Kailiang <kailiangz@nvidia.com>
After interrupts alloc, traffic will stopped, so, move to bottome as much as possible Signed-off-by: Kailiang <kailiangz@nvidia.com>
When live migration, it is useful to log the time to debug latency issues. Signed-off-by: Kailiang <kailiangz@nvidia.com>
Stage2 is enabled by default, we can use "--stage1" to fall back to stage1, debug purpose only. Signed-off-by: Kailiang <kailiangz@nvidia.com>
Sleep can increase whole downtime, remove to shorten the whole downtime Signed-off-by: Kailiang <kailiangz@nvidia.com>
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