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authorPeter Xu <peterx@redhat.com>2018-05-02 18:47:22 +0800
committerJuan Quintela <quintela@redhat.com>2018-05-15 20:24:27 +0200
commit3a7804c3065ac79ff6e609e75ff2765d79f64f85 (patch)
treef6e71bb7685a6462714221fe0908132c842122d0 /migration/migration.c
parent14b1742eaaad1148c5b421eea0ae7e74d823e630 (diff)
migration: allow fault thread to pause
Allows the fault thread to stop handling page faults temporarily. When network failure happened (and if we expect a recovery afterwards), we should not allow the fault thread to continue sending things to source, instead, it should halt for a while until the connection is rebuilt. When the dest main thread noticed the failure, it kicks the fault thread to switch to pause state. Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <20180502104740.12123-7-peterx@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
Diffstat (limited to 'migration/migration.c')
-rw-r--r--migration/migration.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/migration/migration.c b/migration/migration.c
index f9c58d2511..3d3b0a5b4a 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -160,6 +160,7 @@ MigrationIncomingState *migration_incoming_get_current(void)
qemu_mutex_init(&mis_current.rp_mutex);
qemu_event_init(&mis_current.main_thread_load_event, false);
qemu_sem_init(&mis_current.postcopy_pause_sem_dst, 0);
+ qemu_sem_init(&mis_current.postcopy_pause_sem_fault, 0);
init_dirty_bitmap_incoming_migration();