diff options
Diffstat (limited to 'migration/migration.h')
| -rw-r--r-- | migration/migration.h | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/migration/migration.h b/migration/migration.h index c390500604..cdaa10d515 100644 --- a/migration/migration.h +++ b/migration/migration.h @@ -196,7 +196,10 @@ struct MigrationIncomingState { /* A tree of pages that we requested to the source VM */ GTree *page_requested; - /* For debugging purpose only, but would be nice to keep */ + /* + * For postcopy only, count the number of requested page faults that + * still haven't been resolved. + */ int page_requested_count; /* * The mutex helps to maintain the requested pages that we sent to the @@ -210,6 +213,14 @@ struct MigrationIncomingState { * contains valid information. */ QemuMutex page_request_mutex; + /* + * If postcopy preempt is enabled, there is a chance that the main + * thread finished loading its data before the preempt channel has + * finished loading the urgent pages. If that happens, the two threads + * will use this condvar to synchronize, so the main thread will always + * wait until all pages received. + */ + QemuCond page_request_cond; /* * Number of devices that have yet to approve switchover. When this reaches |