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-rw-r--r--hmp-commands.hx4
-rw-r--r--include/sysemu/sysemu.h2
-rw-r--r--migration/migration.c65
-rw-r--r--migration/ram.c7
-rw-r--r--migration/rdma.c2
-rw-r--r--migration/savevm.c10
-rw-r--r--qapi-schema.json4
7 files changed, 52 insertions, 42 deletions
diff --git a/hmp-commands.hx b/hmp-commands.hx
index f3de407647..bb52e4d3bd 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -1025,7 +1025,9 @@ ETEXI
.name = "migrate_start_postcopy",
.args_type = "",
.params = "",
- .help = "Switch migration to postcopy mode",
+ .help = "Followup to a migration command to switch the migration"
+ " to postcopy mode. The x-postcopy-ram capability must "
+ "be set before the original migration command.",
.mhandler.cmd = hmp_migrate_start_postcopy,
},
diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
index f992494e10..3bb8897727 100644
--- a/include/sysemu/sysemu.h
+++ b/include/sysemu/sysemu.h
@@ -112,7 +112,7 @@ void qemu_savevm_state_header(QEMUFile *f);
int qemu_savevm_state_iterate(QEMUFile *f, bool postcopy);
void qemu_savevm_state_cleanup(void);
void qemu_savevm_state_complete_postcopy(QEMUFile *f);
-void qemu_savevm_state_complete_precopy(QEMUFile *f);
+void qemu_savevm_state_complete_precopy(QEMUFile *f, bool iterable_only);
void qemu_savevm_state_pending(QEMUFile *f, uint64_t max_size,
uint64_t *res_non_postcopiable,
uint64_t *res_postcopiable);
diff --git a/migration/migration.c b/migration/migration.c
index c5c977e737..7e4e27b57d 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -768,7 +768,7 @@ void qmp_migrate_start_postcopy(Error **errp)
MigrationState *s = migrate_get_current();
if (!migrate_postcopy_ram()) {
- error_setg(errp, "Enable postcopy with migration_set_capability before"
+ error_setg(errp, "Enable postcopy with migrate_set_capability before"
" the start of migration");
return;
}
@@ -902,38 +902,31 @@ bool migration_in_postcopy(MigrationState *s)
MigrationState *migrate_init(const MigrationParams *params)
{
MigrationState *s = migrate_get_current();
- int64_t bandwidth_limit = s->bandwidth_limit;
- bool enabled_capabilities[MIGRATION_CAPABILITY_MAX];
- int64_t xbzrle_cache_size = s->xbzrle_cache_size;
- int compress_level = s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL];
- int compress_thread_count =
- s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS];
- int decompress_thread_count =
- s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS];
- int x_cpu_throttle_initial =
- s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL];
- int x_cpu_throttle_increment =
- s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT];
-
- memcpy(enabled_capabilities, s->enabled_capabilities,
- sizeof(enabled_capabilities));
- memset(s, 0, sizeof(*s));
+ /*
+ * Reinitialise all migration state, except
+ * parameters/capabilities that the user set, and
+ * locks.
+ */
+ s->bytes_xfer = 0;
+ s->xfer_limit = 0;
+ s->cleanup_bh = 0;
+ s->file = NULL;
+ s->state = MIGRATION_STATUS_NONE;
s->params = *params;
- memcpy(s->enabled_capabilities, enabled_capabilities,
- sizeof(enabled_capabilities));
- s->xbzrle_cache_size = xbzrle_cache_size;
-
- s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = compress_level;
- s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] =
- compress_thread_count;
- s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] =
- decompress_thread_count;
- s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL] =
- x_cpu_throttle_initial;
- s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT] =
- x_cpu_throttle_increment;
- s->bandwidth_limit = bandwidth_limit;
+ s->rp_state.from_dst_file = NULL;
+ s->rp_state.error = false;
+ s->mbps = 0.0;
+ s->downtime = 0;
+ s->expected_downtime = 0;
+ s->dirty_pages_rate = 0;
+ s->dirty_bytes_rate = 0;
+ s->setup_time = 0;
+ s->dirty_sync_count = 0;
+ s->start_postcopy = false;
+ s->migration_thread_running = false;
+ s->last_req_rb = NULL;
+
migrate_set_state(s, MIGRATION_STATUS_NONE, MIGRATION_STATUS_SETUP);
QSIMPLEQ_INIT(&s->src_page_requests);
@@ -1429,6 +1422,12 @@ static int postcopy_start(MigrationState *ms, bool *old_vm_running)
}
/*
+ * Cause any non-postcopiable, but iterative devices to
+ * send out their final data.
+ */
+ qemu_savevm_state_complete_precopy(ms->file, true);
+
+ /*
* in Finish migrate and with the io-lock held everything should
* be quiet, but we've potentially still got dirty pages and we
* need to tell the destination to throw any pages it's already received
@@ -1471,7 +1470,7 @@ static int postcopy_start(MigrationState *ms, bool *old_vm_running)
*/
qemu_savevm_send_postcopy_listen(fb);
- qemu_savevm_state_complete_precopy(fb);
+ qemu_savevm_state_complete_precopy(fb, false);
qemu_savevm_send_ping(fb, 3);
qemu_savevm_send_postcopy_run(fb);
@@ -1538,7 +1537,7 @@ static void migration_completion(MigrationState *s, int current_active_state,
ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE);
if (ret >= 0) {
qemu_file_set_rate_limit(s->file, INT64_MAX);
- qemu_savevm_state_complete_precopy(s->file);
+ qemu_savevm_state_complete_precopy(s->file, false);
}
}
qemu_mutex_unlock_iothread();
diff --git a/migration/ram.c b/migration/ram.c
index 62cf42bfdb..7f32696d79 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -1184,7 +1184,8 @@ int ram_save_queue_pages(MigrationState *ms, const char *rbname,
}
trace_ram_save_queue_pages(ramblock->idstr, start, len);
if (start+len > ramblock->used_length) {
- error_report("%s request overrun start=%zx len=%zx blocklen=%zx",
+ error_report("%s request overrun start=" RAM_ADDR_FMT " len="
+ RAM_ADDR_FMT " blocklen=" RAM_ADDR_FMT,
__func__, start, len, ramblock->used_length);
goto err;
}
@@ -1845,7 +1846,7 @@ int ram_discard_range(MigrationIncomingState *mis,
ret = postcopy_ram_discard_range(mis, host_startaddr, length);
} else {
error_report("ram_discard_range: Overrun block '%s' (%" PRIu64
- "/%zu/%zu)",
+ "/%zx/" RAM_ADDR_FMT")",
block_name, start, length, rb->used_length);
}
@@ -2273,6 +2274,7 @@ static int ram_load_postcopy(QEMUFile *f)
/* Temporary page that is later 'placed' */
void *postcopy_host_page = postcopy_get_tmp_page(mis);
void *last_host = NULL;
+ bool all_zero = false;
while (!ret && !(flags & RAM_SAVE_FLAG_EOS)) {
ram_addr_t addr;
@@ -2280,7 +2282,6 @@ static int ram_load_postcopy(QEMUFile *f)
void *page_buffer = NULL;
void *place_source = NULL;
uint8_t ch;
- bool all_zero = false;
addr = qemu_get_be64(f);
flags = addr & ~TARGET_PAGE_MASK;
diff --git a/migration/rdma.c b/migration/rdma.c
index 553fbd7503..dcabb91005 100644
--- a/migration/rdma.c
+++ b/migration/rdma.c
@@ -577,7 +577,7 @@ static int rdma_add_block(RDMAContext *rdma, const char *block_name,
block->is_ram_block = local->init ? false : true;
if (rdma->blockmap) {
- g_hash_table_insert(rdma->blockmap, (void *) block_offset, block);
+ g_hash_table_insert(rdma->blockmap, (void *)(uintptr_t)block_offset, block);
}
trace_rdma_add_block(block_name, local->nb_blocks,
diff --git a/migration/savevm.c b/migration/savevm.c
index be52314a12..d90e228568 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -1026,7 +1026,7 @@ void qemu_savevm_state_complete_postcopy(QEMUFile *f)
qemu_fflush(f);
}
-void qemu_savevm_state_complete_precopy(QEMUFile *f)
+void qemu_savevm_state_complete_precopy(QEMUFile *f, bool iterable_only)
{
QJSON *vmdesc;
int vmdesc_len;
@@ -1041,9 +1041,11 @@ void qemu_savevm_state_complete_precopy(QEMUFile *f)
QTAILQ_FOREACH(se, &savevm_state.handlers, entry) {
if (!se->ops ||
(in_postcopy && se->ops->save_live_complete_postcopy) ||
+ (in_postcopy && !iterable_only) ||
!se->ops->save_live_complete_precopy) {
continue;
}
+
if (se->ops && se->ops->is_active) {
if (!se->ops->is_active(se->opaque)) {
continue;
@@ -1062,6 +1064,10 @@ void qemu_savevm_state_complete_precopy(QEMUFile *f)
}
}
+ if (iterable_only) {
+ return;
+ }
+
vmdesc = qjson_new();
json_prop_int(vmdesc, "page_size", TARGET_PAGE_SIZE);
json_start_array(vmdesc, "devices");
@@ -1176,7 +1182,7 @@ static int qemu_savevm_state(QEMUFile *f, Error **errp)
ret = qemu_file_get_error(f);
if (ret == 0) {
- qemu_savevm_state_complete_precopy(f);
+ qemu_savevm_state_complete_precopy(f, false);
ret = qemu_file_get_error(f);
}
qemu_savevm_state_cleanup();
diff --git a/qapi-schema.json b/qapi-schema.json
index 36e59b8932..b65905f4d6 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -706,7 +706,9 @@
##
# @migrate-start-postcopy
#
-# Switch migration to postcopy mode
+# Followup to a migration command to switch the migration to postcopy mode.
+# The x-postcopy-ram capability must be set before the original migration
+# command.
#
# Since: 2.5
{ 'command': 'migrate-start-postcopy' }
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-28 05:26:39 +0000