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netdev-dpdk: Post-copy Live Migration support for vhost-user-client.

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Post-copy Live Migration for vHost supported since DPDK 18.11 and
QEMU 2.12. New global config option 'vhost-postcopy-support' added
to control this feature. Ex.:

  ovs-vsctl set Open_vSwitch . other_config:vhost-postcopy-support=true

Changing this value requires restarting the daemon. It's safe to
enable this knob even if QEMU doesn't support post-copy LM.

Feature marked as experimental and disabled by default because it may
cause PMD thread hang on destination host on page fault for the time
of page downloading from the source.

Feature is not compatible with 'mlockall' and 'dequeue zero-copy'.
Support added only for vhost-user-client.

Signed-off-by: Liliia Butorina <l.butorina@partner.samsung.com>
Co-authored-by: Ilya Maximets <i.maximets@samsung.com>
Signed-off-by: Ilya Maximets <i.maximets@samsung.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
This commit is contained in:
Liliia Butorina
2019-05-14 16:08:43 +03:00
committed by Ilya Maximets
parent da05d1c82d
commit 30e834dcb5
7 changed files with 99 additions and 1 deletions
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1
lib/dpdk.h
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@@ -39,6 +39,7 @@ void dpdk_init(const struct smap *ovs_other_config);
void dpdk_set_lcore_id(unsigned cpu);
const char *dpdk_get_vhost_sock_dir(void);
bool dpdk_vhost_iommu_enabled(void);
bool dpdk_vhost_postcopy_enabled(void);
bool dpdk_per_port_memory(void);
void print_dpdk_version(void);
void dpdk_status(const struct ovsrec_open_vswitch *);