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[PATCH 1/5] migration: add trace point when vm_stop_force_state fails
From: |
Daniel P . Berrangé |
Subject: |
[PATCH 1/5] migration: add trace point when vm_stop_force_state fails |
Date: |
Thu, 15 Apr 2021 14:58:47 +0100 |
This is a critical failure scenario for migration that is hard to
diagnose from existing probes. Most likely it is caused by an error
from bdrv_flush(), but we're not logging the errno anywhere, hence
this new probe.
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
migration/migration.c | 1 +
migration/trace-events | 1 +
2 files changed, 2 insertions(+)
diff --git a/migration/migration.c b/migration/migration.c
index 8ca034136b..bee0dcd501 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -3121,6 +3121,7 @@ static void migration_completion(MigrationState *s)
if (!ret) {
bool inactivate = !migrate_colo_enabled();
ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE);
+ trace_migration_completion_vm_stop(ret);
if (ret >= 0) {
ret = migration_maybe_pause(s, ¤t_active_state,
MIGRATION_STATUS_DEVICE);
diff --git a/migration/trace-events b/migration/trace-events
index 668c562fed..8ec28432eb 100644
--- a/migration/trace-events
+++ b/migration/trace-events
@@ -149,6 +149,7 @@ migrate_pending(uint64_t size, uint64_t max, uint64_t pre,
uint64_t compat, uint
migrate_send_rp_message(int msg_type, uint16_t len) "%d: len %d"
migrate_send_rp_recv_bitmap(char *name, int64_t size) "block '%s' size
0x%"PRIi64
migration_completion_file_err(void) ""
+migration_completion_vm_stop(int ret) "ret %d"
migration_completion_postcopy_end(void) ""
migration_completion_postcopy_end_after_complete(void) ""
migration_rate_limit_pre(int ms) "%d ms"
--
2.30.2
- [PATCH 0/5] block, migration: improve debugging of migration bdrv_flush failure, Daniel P . Berrangé, 2021/04/15
- [PATCH 1/5] migration: add trace point when vm_stop_force_state fails,
Daniel P . Berrangé <=
- [PATCH 2/5] softmmu: add trace point when bdrv_flush_all fails, Daniel P . Berrangé, 2021/04/15
- [PATCH 3/5] block: preserve errno from fdatasync failures, Daniel P . Berrangé, 2021/04/15
- [PATCH 4/5] block: add trace point when fdatasync fails, Daniel P . Berrangé, 2021/04/15
- [PATCH 5/5] block: remove duplicate trace.h include, Daniel P . Berrangé, 2021/04/15
- Re: [PATCH 0/5] block, migration: improve debugging of migration bdrv_flush failure, Connor Kuehl, 2021/04/15