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[Qemu-devel] [PATCH V6 05/10] migration: introduce postcopy-blocktime ca
From: |
Alexey Perevalov |
Subject: |
[Qemu-devel] [PATCH V6 05/10] migration: introduce postcopy-blocktime capability |
Date: |
Tue, 23 May 2017 14:31:06 +0300 |
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>
---
include/migration/migration.h | 1 +
migration/migration.c | 9 +++++++++
qapi-schema.json | 5 ++++-
3 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/include/migration/migration.h b/include/migration/migration.h
index 49ec501..2951253 100644
--- a/include/migration/migration.h
+++ b/include/migration/migration.h
@@ -270,6 +270,7 @@ 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_message(MigrationIncomingState *mis,
diff --git a/migration/migration.c b/migration/migration.c
index d735976..e10284e 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -1341,6 +1341,15 @@ 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/qapi-schema.json b/qapi-schema.json
index 80603cf..78617fe 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -894,11 +894,14 @@
# @release-ram: if enabled, qemu will free the migrated ram pages on the source
# during postcopy-ram migration. (since 2.9)
#
+# @postcopy-blocktime: Calculate downtime for postcopy live migration (since
2.10)
+#
# Since: 1.2
##
{ 'enum': 'MigrationCapability',
'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks',
- 'compress', 'events', 'postcopy-ram', 'x-colo', 'release-ram'] }
+ 'compress', 'events', 'postcopy-ram', 'x-colo', 'release-ram',
+ 'postcopy-blocktime'] }
##
# @MigrationCapabilityStatus:
--
1.8.3.1
Message not available