qemu/migration
Alexey Perevalov 2a4c42f18c migration: add postcopy blocktime ctx into MigrationIncomingState
This patch adds request to kernel space for UFFD_FEATURE_THREAD_ID, in
case this feature is provided by kernel.

PostcopyBlocktimeContext is encapsulated inside postcopy-ram.c,
due to it being a postcopy-only feature.
Also it defines PostcopyBlocktimeContext's instance live time.
Information from PostcopyBlocktimeContext instance will be provided
much after postcopy migration end, instance of PostcopyBlocktimeContext
will live till QEMU exit, but part of it (vcpu_addr,
page_fault_vcpu_time) used only during calculation, will be released
when postcopy ended or failed.

To enable postcopy blocktime calculation on destination, need to
request proper compatibility (Patch for documentation will be at the
tail of the patch set).

As an example following command enable that capability, assume QEMU was
started with
-chardev socket,id=charmonitor,path=/var/lib/migrate-vm-monitor.sock
option to control it

[root@host]#printf "{\"execute\" : \"qmp_capabilities\"}\r\n \
{\"execute\": \"migrate-set-capabilities\" , \"arguments\":   {
\"capabilities\": [ { \"capability\": \"postcopy-blocktime\", \"state\":
true } ] } }" | nc -U /var/lib/migrate-vm-monitor.sock

Or just with HMP
(qemu) migrate_set_capability postcopy-blocktime on

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Alexey Perevalov <a.perevalov@samsung.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-Id: <1521742647-25550-3-git-send-email-a.perevalov@samsung.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2018-04-25 18:02:12 +01:00
..
block-dirty-bitmap.c migration: add postcopy migration of dirty bitmaps 2018-03-13 17:06:09 -04:00
block.c migration/block: compare only read blocks against the rate limiter 2018-03-23 16:45:18 +00:00
block.h migration: disable auto-converge during bulk block migration 2017-09-27 11:27:14 +01:00
channel.c migration: Route errors down through migration_channel_connect 2018-02-06 10:55:12 +00:00
channel.h migration: Route errors down through migration_channel_connect 2018-02-06 10:55:12 +00:00
colo-comm.c migration: pre_save return int 2017-09-27 11:35:59 +01:00
colo-failover.c Include less of the generated modular QAPI headers 2018-03-02 13:45:50 -06:00
colo.c Include less of the generated modular QAPI headers 2018-03-02 13:45:50 -06:00
exec.c Include qapi/error.h exactly where needed 2018-02-09 13:50:17 +01:00
exec.h migration: Export exec.c functions in its own file 2017-06-01 18:49:22 +02:00
fd.c Include qapi/error.h exactly where needed 2018-02-09 13:50:17 +01:00
fd.h migration: Export fd.c functions in its own file 2017-06-01 18:49:22 +02:00
global_state.c migration: pre_save return int 2017-09-27 11:35:59 +01:00
Makefile.objs migration: add postcopy migration of dirty bitmaps 2018-03-13 17:06:09 -04:00
migration.c migration: introduce postcopy-blocktime capability 2018-04-25 18:02:12 +01:00
migration.h migration: add postcopy blocktime ctx into MigrationIncomingState 2018-04-25 18:02:12 +01:00
page_cache.c migration: Make sure that we pass the right cache size 2017-10-29 14:06:15 +01:00
page_cache.h migration: Make cache_init() take an error parameter 2017-10-23 18:03:25 +02:00
postcopy-ram.c migration: add postcopy blocktime ctx into MigrationIncomingState 2018-04-25 18:02:12 +01:00
postcopy-ram.h vhost+postcopy: Wire up POSTCOPY_END notify 2018-03-20 16:40:37 +02:00
qemu-file-channel.c migration: Split qemu-file.h 2017-06-01 18:49:22 +02:00
qemu-file-channel.h migration: Export qemu-file-channel.c functions in its own file 2017-05-18 19:20:50 +02:00
qemu-file.c migration: Fix rate limiting issue on RDMA migration 2018-03-23 16:37:15 +00:00
qemu-file.h migration/qemu-file: add qemu_put_counted_string() 2018-03-13 17:05:55 -04:00
qjson.c migration: Move qjson.h to migration/ 2017-05-18 19:20:59 +02:00
qjson.h migration: Move qjson.h to migration/ 2017-05-18 19:20:59 +02:00
ram.c virtio,vhost,pci,pc: features, cleanups 2018-03-20 15:48:34 +00:00
ram.h migration/ram: ramblock_recv_bitmap_test_byte_offset 2018-03-20 05:03:28 +02:00
rdma.c migration: Allow migrate_fd_connect to take an Error * 2018-02-06 10:55:12 +00:00
rdma.h migration: Export rdma.c functions in its own file 2017-06-01 18:49:23 +02:00
savevm.c virtio,vhost,pci,pc: features, cleanups 2018-03-20 15:48:34 +00:00
savevm.h migration: introduce postcopy-only pending 2018-03-13 17:05:41 -04:00
socket.c migration: convert socket server to QIONetListener 2018-03-23 16:27:24 +00:00
socket.h migration: Export socket.c functions in its own file 2017-06-01 18:49:23 +02:00
tls.c qio: non-default context for TLS handshake 2018-03-06 10:19:07 +00:00
tls.h migration: Export tls.c functions in its own file 2017-06-01 18:49:23 +02:00
trace-events virtio,vhost,pci,pc: features, cleanups 2018-03-20 15:48:34 +00:00
vmstate-types.c migration: Route more error paths 2017-09-27 11:44:18 +01:00
vmstate.c migration: wire vmstate_save_state errors up to vmstate_subsection_save 2017-09-27 11:38:21 +01:00
xbzrle.c migration: Create migration/xbzrle.h 2017-05-18 18:04:54 +02:00
xbzrle.h migration: Create migration/xbzrle.h 2017-05-18 18:04:54 +02:00