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[PULL,11/21] migration: allow cancel to unpause

Message ID 20171023160800.20540-12-quintela@redhat.com
State New
Headers show
Series [PULL,01/21] migration: Fix migrate_test_apply for multifd parameters | expand

Commit Message

Juan Quintela Oct. 23, 2017, 4:07 p.m. UTC 
From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

If a migration_cancel is issued during the new paused state,
kick the pause_sem to get to unpause so it can cancel.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
---
 migration/migration.c | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/migration/migration.c b/migration/migration.c
index 90bfdc3a7c..b523d8f215 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -1114,6 +1114,10 @@  static void migrate_fd_cancel(MigrationState *s)
         if (!migration_is_setup_or_active(old_state)) {
             break;
         }
+        /* If the migration is paused, kick it out of the pause */
+        if (old_state == MIGRATION_STATUS_PRE_SWITCHOVER) {
+            qemu_sem_post(&s->pause_sem);
+        }
         migrate_set_state(&s->state, old_state, MIGRATION_STATUS_CANCELLING);
     } while (s->state != MIGRATION_STATUS_CANCELLING);