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2015-12-08kvmclock: add a new function to update env->tsc.WW-2015-52Liang Li3-16/+48
(Back port from upstream, commit id: 0fd7e098db30e302d27920487f0afec) The commit 317b0a6d8 fixed an issue which caused by the outdated env->tsc value, but the fix lead to 'cpu_synchronize_all_states()' called twice during live migration. The 'cpu_synchronize_all_states()' takes about 130us for a VM which has 4 vcpus, it's a bit expensive. Synchronize the whole CPU context just for updating env->tsc is too wasting, this patch use a new function to update the env->tsc. Comparing to 'cpu_synchronize_all_states()', it only takes about 20us. Change-Id: I7dc8371aa17b005d073249c3732d9a7424f20a25 Signed-off-by: Liang Li <liang.z.li@intel.com> Message-Id: <1446695464-27116-2-git-send-email-liang.z.li@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-11-12Bug fix.Liang Li1-1/+1
qemu_savevm_state_cancel becomes mandatory operation, it should be done unconditionally. back port from upstream. Change-Id: If1a2a6d70f1b2632b72a7f7290a67f442096fdcf Signed-off-by: Denis V. Lunev <den@openvz.org> Reviewed-by: Liang Li <liang.z.li@intel.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Liang Li <liang.z.li@intel.com>
2015-10-29Merge "migration: do cleanup operation after completion"Don Dugger3-9/+7
2015-10-16These changes comes from the qemu version 2.4.0.1 bugfix release,José Pekkarinen4-12/+29
taken from the official qemu wiki page. No further changes included. Change-Id: I690a0aba6a986291252e766c60cf1fbea9a0cd46 Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
2015-09-24migration: do cleanup operation after completionLiang Li3-9/+7
Because of the patch 3ea3b7fa9af067982f34b of kvm, now the migration_end() is a time consuming operation, which takes about dozens of milliseconds, and will prolong VM downtime. Such an operation should be done after migration completion. For a VM with 8G RAM, this patch can reduce the VM downtime about 32 ms during live migration. Change-Id: Iddd10bd5a2b1bf52cce36253f303fc458da343cd Signed-off-by: Liang Li <liang.z.li@intel.com>
2015-09-01Add qemu 2.4.0Yang Zhang15649-0/+4157143
Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>