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Block live migration

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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 <lirans@il.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
This commit is contained in:
lirans@il.ibm.com 2009-11-02 15:40:58 +02:00 • committed by Anthony Liguori
parent 7cd1e32a86
commit c163b5cae9
14 changed files with 713 additions and 40 deletions
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7
migration-unix.c
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@ -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;