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[Qemu-devel] [PATCH v5 24/28] migration: don't use an array for storing
From: |
Daniel P. Berrange |
Subject: |
[Qemu-devel] [PATCH v5 24/28] migration: don't use an array for storing migrate parameters |
Date: |
Fri, 18 Mar 2016 14:30:59 +0000 |
The MigrateState struct uses an array for storing migration
parameters. This presumes that all future parameters will
be integers too, which is not going to be the case. There
is no functional reason why an array is used, if anything
it makes the code less clear. The QAPI schema already
defines a struct - MigrationParameters - capable of storing
all the individual parameters, so just use that instead of
an array.
Reviewed-by: Dr. David Alan Gilbert <address@hidden>
Signed-off-by: Daniel P. Berrange <address@hidden>
---
include/migration/migration.h | 5 +++-
migration/migration.c | 56 +++++++++++++++++++------------------------
migration/ram.c | 6 ++---
3 files changed, 30 insertions(+), 37 deletions(-)
diff --git a/include/migration/migration.h b/include/migration/migration.h
index 46c1bbe..9c5a002 100644
--- a/include/migration/migration.h
+++ b/include/migration/migration.h
@@ -135,9 +135,12 @@ struct MigrationState
QemuThread thread;
QEMUBH *cleanup_bh;
QEMUFile *to_dst_file;
- int parameters[MIGRATION_PARAMETER__MAX];
+
+ /* New style params from 'migrate-set-parameters' */
+ MigrationParameters parameters;
int state;
+ /* Old style params from 'migrate' command */
MigrationParams params;
/* State related to return path */
diff --git a/migration/migration.c b/migration/migration.c
index 290a611..7a06111 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -82,16 +82,14 @@ MigrationState *migrate_get_current(void)
.bandwidth_limit = MAX_THROTTLE,
.xbzrle_cache_size = DEFAULT_MIGRATE_CACHE_SIZE,
.mbps = -1,
- .parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] =
- DEFAULT_MIGRATE_COMPRESS_LEVEL,
- .parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] =
- DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT,
- .parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] =
- DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT,
- .parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL] =
- DEFAULT_MIGRATE_X_CPU_THROTTLE_INITIAL,
- .parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT] =
- DEFAULT_MIGRATE_X_CPU_THROTTLE_INCREMENT,
+ .parameters = {
+ .compress_level = DEFAULT_MIGRATE_COMPRESS_LEVEL,
+ .compress_threads = DEFAULT_MIGRATE_COMPRESS_THREAD_COUNT,
+ .decompress_threads = DEFAULT_MIGRATE_DECOMPRESS_THREAD_COUNT,
+ .x_cpu_throttle_initial = DEFAULT_MIGRATE_X_CPU_THROTTLE_INITIAL,
+ .x_cpu_throttle_increment =
+ DEFAULT_MIGRATE_X_CPU_THROTTLE_INCREMENT,
+ },
};
if (!once) {
@@ -534,15 +532,11 @@ MigrationParameters *qmp_query_migrate_parameters(Error
**errp)
MigrationState *s = migrate_get_current();
params = g_malloc0(sizeof(*params));
- params->compress_level = s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL];
- params->compress_threads =
- s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS];
- params->decompress_threads =
- s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS];
- params->x_cpu_throttle_initial =
- s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL];
- params->x_cpu_throttle_increment =
- s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT];
+ params->compress_level = s->parameters.compress_level;
+ params->compress_threads = s->parameters.compress_threads;
+ params->decompress_threads = s->parameters.decompress_threads;
+ params->x_cpu_throttle_initial = s->parameters.x_cpu_throttle_initial;
+ params->x_cpu_throttle_increment = s->parameters.x_cpu_throttle_increment;
return params;
}
@@ -743,7 +737,8 @@ void qmp_migrate_set_parameters(bool has_compress_level,
bool has_x_cpu_throttle_initial,
int64_t x_cpu_throttle_initial,
bool has_x_cpu_throttle_increment,
- int64_t x_cpu_throttle_increment, Error **errp)
+ int64_t x_cpu_throttle_increment,
+ Error **errp)
{
MigrationState *s = migrate_get_current();
@@ -780,26 +775,23 @@ void qmp_migrate_set_parameters(bool has_compress_level,
}
if (has_compress_level) {
- s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = compress_level;
+ s->parameters.compress_level = compress_level;
}
if (has_compress_threads) {
- s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] = compress_threads;
+ s->parameters.compress_threads = compress_threads;
}
if (has_decompress_threads) {
- s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] =
- decompress_threads;
+ s->parameters.decompress_threads = decompress_threads;
}
if (has_x_cpu_throttle_initial) {
- s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL] =
- x_cpu_throttle_initial;
+ s->parameters.x_cpu_throttle_initial = x_cpu_throttle_initial;
}
-
if (has_x_cpu_throttle_increment) {
- s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT] =
- x_cpu_throttle_increment;
+ s->parameters.x_cpu_throttle_increment = x_cpu_throttle_increment;
}
}
+
void qmp_migrate_start_postcopy(Error **errp)
{
MigrationState *s = migrate_get_current();
@@ -1186,7 +1178,7 @@ int migrate_compress_level(void)
s = migrate_get_current();
- return s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL];
+ return s->parameters.compress_level;
}
int migrate_compress_threads(void)
@@ -1195,7 +1187,7 @@ int migrate_compress_threads(void)
s = migrate_get_current();
- return s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS];
+ return s->parameters.compress_threads;
}
int migrate_decompress_threads(void)
@@ -1204,7 +1196,7 @@ int migrate_decompress_threads(void)
s = migrate_get_current();
- return s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS];
+ return s->parameters.decompress_threads;
}
bool migrate_use_events(void)
diff --git a/migration/ram.c b/migration/ram.c
index 704f6a9..42957bd 100644
--- a/migration/ram.c
+++ b/migration/ram.c
@@ -426,10 +426,8 @@ static size_t save_page_header(QEMUFile *f, RAMBlock
*block, ram_addr_t offset)
static void mig_throttle_guest_down(void)
{
MigrationState *s = migrate_get_current();
- uint64_t pct_initial =
- s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INITIAL];
- uint64_t pct_icrement =
- s->parameters[MIGRATION_PARAMETER_X_CPU_THROTTLE_INCREMENT];
+ uint64_t pct_initial = s->parameters.x_cpu_throttle_initial;
+ uint64_t pct_icrement = s->parameters.x_cpu_throttle_increment;
/* We have not started throttling yet. Let's start it. */
if (!cpu_throttle_active()) {
--
2.5.0
- [Qemu-devel] [PATCH v5 15/28] migration: convert fd socket protocol to use QIOChannel, (continued)
- [Qemu-devel] [PATCH v5 15/28] migration: convert fd socket protocol to use QIOChannel, Daniel P. Berrange, 2016/03/18
- [Qemu-devel] [PATCH v5 16/28] migration: convert exec socket protocol to use QIOChannel, Daniel P. Berrange, 2016/03/18
- [Qemu-devel] [PATCH v5 14/28] migration: convert tcp socket protocol to use QIOChannel, Daniel P. Berrange, 2016/03/18
- [Qemu-devel] [PATCH v5 18/28] migration: convert savevm to use QIOChannel for writing to files, Daniel P. Berrange, 2016/03/18
- [Qemu-devel] [PATCH v5 17/28] migration: convert RDMA to use QIOChannel interface, Daniel P. Berrange, 2016/03/18
- [Qemu-devel] [PATCH v5 19/28] migration: delete QEMUFile buffer implementation, Daniel P. Berrange, 2016/03/18
- [Qemu-devel] [PATCH v5 21/28] migration: delete QEMUFile sockets implementation, Daniel P. Berrange, 2016/03/18
- [Qemu-devel] [PATCH v5 20/28] migration: delete QEMUSizedBuffer struct, Daniel P. Berrange, 2016/03/18
- [Qemu-devel] [PATCH v5 23/28] migration: move definition of struct QEMUFile back into qemu-file.c, Daniel P. Berrange, 2016/03/18
- [Qemu-devel] [PATCH v5 22/28] migration: delete QEMUFile stdio implementation, Daniel P. Berrange, 2016/03/18
- [Qemu-devel] [PATCH v5 24/28] migration: don't use an array for storing migrate parameters,
Daniel P. Berrange <=
- [Qemu-devel] [PATCH v5 25/28] migration: define 'tls-creds' and 'tls-hostname' migration parameters, Daniel P. Berrange, 2016/03/18
- [Qemu-devel] [PATCH v5 28/28] migration: remove qemu_get_fd method from QEMUFile, Daniel P. Berrange, 2016/03/18
- [Qemu-devel] [PATCH v5 26/28] migration: add support for encrypting data with TLS, Daniel P. Berrange, 2016/03/18
- [Qemu-devel] [PATCH v5 27/28] migration: remove support for non-iovec based write handlers, Daniel P. Berrange, 2016/03/18