qemu-kvm/SOURCES/kvm-migration-move-wait-unp...

119 lines
4.5 KiB
Diff

From e9848f4a4f45960bff1a2a7bc4a4670670de37a5 Mon Sep 17 00:00:00 2001
From: Laurent Vivier <lvivier@redhat.com>
Date: Wed, 4 Aug 2021 07:10:12 -0400
Subject: [PATCH 21/39] migration: move wait-unplug loop to its own function
RH-Author: Miroslav Rezanina <mrezanin@redhat.com>
RH-MergeRequest: 32: Synchronize with RHEL-AV 8.5 release 27 to RHEL 9
RH-Commit: [13/15] ab3f26a86e4ea955678323608512e54af2a7c83b (mrezanin/centos-src-qemu-kvm)
RH-Bugzilla: 1957194
RH-Acked-by: Stefano Garzarella <sgarzare@redhat.com>
RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
RH-Acked-by: Igor Mammedov <imammedo@redhat.com>
RH-Acked-by: Andrew Jones <drjones@redhat.com>
The loop is used in migration_thread() and bg_migration_thread(),
so we can move it to its own function and call it from these both places.
Moreover, in migration_thread() we have a wrong state transition from
SETUP to ACTIVE while state could be WAIT_UNPLUG. This is correctly
managed in bg_migration_thread() so use this code instead.
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Message-Id: <20210629155007.629086-2-lvivier@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
(cherry picked from commit fde93d99d9c208c07e2dcc24cd04e824d2b65b35)
Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
---
migration/migration.c | 54 +++++++++++++++++++++----------------------
1 file changed, 26 insertions(+), 28 deletions(-)
diff --git a/migration/migration.c b/migration/migration.c
index 9cf1cde39d..58df1dac05 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -3681,6 +3681,28 @@ bool migration_rate_limit(void)
return urgent;
}
+/*
+ * if failover devices are present, wait they are completely
+ * unplugged
+ */
+
+static void qemu_savevm_wait_unplug(MigrationState *s, int old_state,
+ int new_state)
+{
+ if (qemu_savevm_state_guest_unplug_pending()) {
+ migrate_set_state(&s->state, old_state, MIGRATION_STATUS_WAIT_UNPLUG);
+
+ while (s->state == MIGRATION_STATUS_WAIT_UNPLUG &&
+ qemu_savevm_state_guest_unplug_pending()) {
+ qemu_sem_timedwait(&s->wait_unplug_sem, 250);
+ }
+
+ migrate_set_state(&s->state, MIGRATION_STATUS_WAIT_UNPLUG, new_state);
+ } else {
+ migrate_set_state(&s->state, old_state, new_state);
+ }
+}
+
/*
* Master migration thread on the source VM.
* It drives the migration and pumps the data down the outgoing channel.
@@ -3727,22 +3749,10 @@ static void *migration_thread(void *opaque)
qemu_savevm_state_setup(s->to_dst_file);
- if (qemu_savevm_state_guest_unplug_pending()) {
- migrate_set_state(&s->state, MIGRATION_STATUS_SETUP,
- MIGRATION_STATUS_WAIT_UNPLUG);
-
- while (s->state == MIGRATION_STATUS_WAIT_UNPLUG &&
- qemu_savevm_state_guest_unplug_pending()) {
- qemu_sem_timedwait(&s->wait_unplug_sem, 250);
- }
-
- migrate_set_state(&s->state, MIGRATION_STATUS_WAIT_UNPLUG,
- MIGRATION_STATUS_ACTIVE);
- }
+ qemu_savevm_wait_unplug(s, MIGRATION_STATUS_SETUP,
+ MIGRATION_STATUS_ACTIVE);
s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start;
- migrate_set_state(&s->state, MIGRATION_STATUS_SETUP,
- MIGRATION_STATUS_ACTIVE);
trace_migration_thread_setup_complete();
@@ -3850,21 +3860,9 @@ static void *bg_migration_thread(void *opaque)
qemu_savevm_state_header(s->to_dst_file);
qemu_savevm_state_setup(s->to_dst_file);
- if (qemu_savevm_state_guest_unplug_pending()) {
- migrate_set_state(&s->state, MIGRATION_STATUS_SETUP,
- MIGRATION_STATUS_WAIT_UNPLUG);
-
- while (s->state == MIGRATION_STATUS_WAIT_UNPLUG &&
- qemu_savevm_state_guest_unplug_pending()) {
- qemu_sem_timedwait(&s->wait_unplug_sem, 250);
- }
+ qemu_savevm_wait_unplug(s, MIGRATION_STATUS_SETUP,
+ MIGRATION_STATUS_ACTIVE);
- migrate_set_state(&s->state, MIGRATION_STATUS_WAIT_UNPLUG,
- MIGRATION_STATUS_ACTIVE);
- } else {
- migrate_set_state(&s->state, MIGRATION_STATUS_SETUP,
- MIGRATION_STATUS_ACTIVE);
- }
s->setup_time = qemu_clock_get_ms(QEMU_CLOCK_HOST) - setup_start;
trace_migration_thread_setup_complete();
--
2.27.0