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[PULL 16/18] migration: Allow migrate-recover to run multiple times
From: |
Dr. David Alan Gilbert (git) |
Subject: |
[PULL 16/18] migration: Allow migrate-recover to run multiple times |
Date: |
Thu, 21 Apr 2022 17:40:41 +0100 |
From: Peter Xu <peterx@redhat.com>
Previously migration didn't have an easy way to cleanup the listening
transport, migrate recovery only allows to execute once. That's done with a
trick flag in postcopy_recover_triggered.
Now the facility is already there.
Drop postcopy_recover_triggered and instead allows a new migrate-recover to
release the previous listener transport.
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20220331150857.74406-8-peterx@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
migration/migration.c | 13 ++-----------
migration/migration.h | 1 -
migration/savevm.c | 3 ---
3 files changed, 2 insertions(+), 15 deletions(-)
diff --git a/migration/migration.c b/migration/migration.c
index 1405b95b95..03ae53074b 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -2164,11 +2164,8 @@ void qmp_migrate_recover(const char *uri, Error **errp)
return;
}
- if (qatomic_cmpxchg(&mis->postcopy_recover_triggered,
- false, true) == true) {
- error_setg(errp, "Migrate recovery is triggered already");
- return;
- }
+ /* If there's an existing transport, release it */
+ migration_incoming_transport_cleanup(mis);
/*
* Note that this call will never start a real migration; it will
@@ -2176,12 +2173,6 @@ void qmp_migrate_recover(const char *uri, Error **errp)
* to continue using that newly established channel.
*/
qemu_start_incoming_migration(uri, errp);
-
- /* Safe to dereference with the assert above */
- if (*errp) {
- /* Reset the flag so user could still retry */
- qatomic_set(&mis->postcopy_recover_triggered, false);
- }
}
void qmp_migrate_pause(Error **errp)
diff --git a/migration/migration.h b/migration/migration.h
index f17ccc657c..a863032b71 100644
--- a/migration/migration.h
+++ b/migration/migration.h
@@ -139,7 +139,6 @@ struct MigrationIncomingState {
struct PostcopyBlocktimeContext *blocktime_ctx;
/* notify PAUSED postcopy incoming migrations to try to continue */
- bool postcopy_recover_triggered;
QemuSemaphore postcopy_pause_sem_dst;
QemuSemaphore postcopy_pause_sem_fault;
diff --git a/migration/savevm.c b/migration/savevm.c
index 02ed94c180..d9076897b8 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -2589,9 +2589,6 @@ static bool
postcopy_pause_incoming(MigrationIncomingState *mis)
assert(migrate_postcopy_ram());
- /* Clear the triggered bit to allow one recovery */
- mis->postcopy_recover_triggered = false;
-
/*
* Unregister yank with either from/to src would work, since ioc behind it
* is the same
--
2.35.1
- [PULL 01/18] tests: improve error message when saving TLS PSK file fails, (continued)
- [PULL 01/18] tests: improve error message when saving TLS PSK file fails, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 03/18] tests: print newline after QMP response in qtest logs, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 04/18] migration: fix use of TLS PSK credentials with a UNIX socket, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 06/18] tests: merge code for UNIX and TCP migration pre-copy tests, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 09/18] tests: expand the migration precopy helper to support failures, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 10/18] migration: Postpone releasing MigrationState.hostname, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 08/18] tests: switch migration FD passing test to use common precopy helper, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 05/18] tests: switch MigrateStart struct to be stack allocated, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 11/18] migration: Drop multifd tls_hostname cache, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 13/18] migration: Move migrate_allow_multifd and helpers into migration.c, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 16/18] migration: Allow migrate-recover to run multiple times,
Dr. David Alan Gilbert (git) <=
- [PULL 14/18] migration: Export ram_load_postcopy(), Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 18/18] migration: Read state once, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 12/18] migration: Add pss.postcopy_requested status, Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 15/18] migration: Move channel setup out of postcopy_try_recover(), Dr. David Alan Gilbert (git), 2022/04/21
- [PULL 17/18] migration: Fix operator type, Dr. David Alan Gilbert (git), 2022/04/21
- Re: [PULL 00/18] migration queue, Dr. David Alan Gilbert, 2022/04/21
- [PULL 00/18] migration queue, Dr. David Alan Gilbert (git), 2022/04/21