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[Qemu-devel] [PULL 07/27] migration: introduce postcopy-blocktime capabi
From: |
Juan Quintela |
Subject: |
[Qemu-devel] [PULL 07/27] migration: introduce postcopy-blocktime capability |
Date: |
Mon, 15 Jan 2018 12:52:49 +0100 |
From: Alexey Perevalov <address@hidden>
Right now it could be used on destination side to
enable vCPU blocktime calculation for postcopy live migration.
vCPU blocktime - it's time since vCPU thread was put into
interruptible sleep, till memory page was copied and thread awake.
Reviewed-by: Dr. David Alan Gilbert <address@hidden>
Signed-off-by: Alexey Perevalov <address@hidden>
Reviewed-by: Juan Quintela <address@hidden>
Signed-off-by: Juan Quintela <address@hidden>
---
migration/migration.c | 9 +++++++++
migration/migration.h | 1 +
qapi/migration.json | 6 +++++-
3 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/migration/migration.c b/migration/migration.c
index 19917a4b5b..fb876e9fca 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -1499,6 +1499,15 @@ bool migrate_zero_blocks(void)
return s->enabled_capabilities[MIGRATION_CAPABILITY_ZERO_BLOCKS];
}
+bool migrate_postcopy_blocktime(void)
+{
+ MigrationState *s;
+
+ s = migrate_get_current();
+
+ return s->enabled_capabilities[MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME];
+}
+
bool migrate_use_compression(void)
{
MigrationState *s;
diff --git a/migration/migration.h b/migration/migration.h
index 663415fe48..9ab8d07004 100644
--- a/migration/migration.h
+++ b/migration/migration.h
@@ -201,6 +201,7 @@ int migrate_compress_level(void);
int migrate_compress_threads(void);
int migrate_decompress_threads(void);
bool migrate_use_events(void);
+bool migrate_postcopy_blocktime(void);
/* Sending on the return path - generic and then for each message type */
void migrate_send_rp_shut(MigrationIncomingState *mis,
diff --git a/qapi/migration.json b/qapi/migration.json
index 4cd3d13158..4d8ccdf776 100644
--- a/qapi/migration.json
+++ b/qapi/migration.json
@@ -352,12 +352,16 @@
#
# @x-multifd: Use more than one fd for migration (since 2.11)
#
+# @postcopy-blocktime: Calculate downtime for postcopy live migration
+# (since 2.12)
+#
# Since: 1.2
##
{ 'enum': 'MigrationCapability',
'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks',
'compress', 'events', 'postcopy-ram', 'x-colo', 'release-ram',
- 'block', 'return-path', 'pause-before-switchover', 'x-multifd' ] }
+ 'block', 'return-path', 'pause-before-switchover', 'x-multifd',
+ 'postcopy-blocktime' ] }
##
# @MigrationCapabilityStatus:
--
2.14.3
- [Qemu-devel] [PULL 00/27] Migration pull, Juan Quintela, 2018/01/15
- [Qemu-devel] [PULL 02/27] migration: print features as on off, Juan Quintela, 2018/01/15
- [Qemu-devel] [PULL 01/27] migration: Use proper types in json, Juan Quintela, 2018/01/15
- [Qemu-devel] [PULL 03/27] migration: free addr in the same function that we created it, Juan Quintela, 2018/01/15
- [Qemu-devel] [PULL 05/27] migration: free result string, Juan Quintela, 2018/01/15
- [Qemu-devel] [PULL 04/27] docs: Convert migration.txt to rst, Juan Quintela, 2018/01/15
- [Qemu-devel] [PULL 06/27] migration: fix analyze-migration.py script with radix table, Juan Quintela, 2018/01/15
- [Qemu-devel] [PULL 07/27] migration: introduce postcopy-blocktime capability,
Juan Quintela <=
- [Qemu-devel] [PULL 08/27] migration: add postcopy blocktime ctx into MigrationIncomingState, Juan Quintela, 2018/01/15
- [Qemu-devel] [PULL 09/27] migration: calculate vCPU blocktime on dst side, Juan Quintela, 2018/01/15
- [Qemu-devel] [PULL 10/27] migration: postcopy_blocktime documentation, Juan Quintela, 2018/01/15
- [Qemu-devel] [PULL 11/27] migration: add blocktime calculation into migration-test, Juan Quintela, 2018/01/15
- [Qemu-devel] [PULL 12/27] migration: add postcopy total blocktime into query-migrate, Juan Quintela, 2018/01/15
- [Qemu-devel] [PULL 13/27] migration: Guard ram_bytes_remaining against early call, Juan Quintela, 2018/01/15