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mode: <>2009-11-02 15:40:58 +0200
committerAnthony Liguori <>2009-11-17 08:49:30 -0600
commitc163b5cae98be8eda675b96e2dec4707bfa7fbbf (patch)
tree7c50d7a326b72c6aa1906e4055ecf049d667fad1 /migration-unix.c
parentExpose a mechanism to trace block writes (diff)
Block live migration
This patch introduces block migration called during live migration. Block are being copied to the destination in an async way. First the code will transfer the whole disk and then transfer all dirty blocks accumulted during the migration. Still need to improve transition from the iterative phase of migration to the end phase. For now transition will take place when all blocks transfered once, all the dirty blocks will be transfered during the end phase (guest is suspended). Changes from v4: - Global variabels moved to a global state structure allocated dynamically. - Minor coding style issues. - Poll block.c for tracking of dirty blocks instead of manage it here. Signed-off-by: Liran Schour <> Signed-off-by: Anthony Liguori <>
Diffstat (limited to 'migration-unix.c')
1 files changed, 6 insertions, 1 deletions
diff --git a/migration-unix.c b/migration-unix.c
index a26587a3e..25cd6d3d2 100644
--- a/migration-unix.c
+++ b/migration-unix.c
@@ -77,7 +77,9 @@ static void unix_wait_for_connect(void *opaque)
MigrationState *unix_start_outgoing_migration(const char *path,
int64_t bandwidth_limit,
- int detach)
+ int detach,
+ int blk,
+ int inc)
FdMigrationState *s;
struct sockaddr_un addr;
@@ -95,6 +97,9 @@ MigrationState *unix_start_outgoing_migration(const char *path,
s->mig_state.get_status = migrate_fd_get_status;
s->mig_state.release = migrate_fd_release;
+ s->mig_state.blk = blk;
+ s->mig_state.shared = inc;
s->state = MIG_STATE_ACTIVE;
s->mon_resume = NULL;
s->bandwidth_limit = bandwidth_limit;