That the implementation does the check every 100 milliseconds is an implementation detail that shouldn't be seen on the interfaz. Notice that all callers of qemu_file_set_rate_limit() used the division or pass 0, so this change is a NOP.
Signed-off-by: Juan Quintela <quint...@redhat.com> --- migration/migration.c | 7 +++---- migration/options.c | 4 ++-- migration/qemu-file.c | 6 +++++- 3 files changed, 10 insertions(+), 7 deletions(-) diff --git a/migration/migration.c b/migration/migration.c index 3979a98949..e17a6538b4 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -2117,7 +2117,7 @@ static int postcopy_start(MigrationState *ms) * will notice we're in POSTCOPY_ACTIVE and not actually * wrap their state up here */ - qemu_file_set_rate_limit(ms->to_dst_file, bandwidth / XFER_LIMIT_RATIO); + qemu_file_set_rate_limit(ms->to_dst_file, bandwidth); if (migrate_postcopy_ram()) { /* Ping just for debugging, helps line traces up */ qemu_savevm_send_ping(ms->to_dst_file, 2); @@ -3207,11 +3207,10 @@ void migrate_fd_connect(MigrationState *s, Error *error_in) if (resume) { /* This is a resumed migration */ - rate_limit = migrate_max_postcopy_bandwidth() / - XFER_LIMIT_RATIO; + rate_limit = migrate_max_postcopy_bandwidth(); } else { /* This is a fresh new migration */ - rate_limit = migrate_max_bandwidth() / XFER_LIMIT_RATIO; + rate_limit = migrate_max_bandwidth(); /* Notify before starting migration thread */ notifier_list_notify(&migration_state_notifiers, s); diff --git a/migration/options.c b/migration/options.c index 2e759cc306..d04b5fbc3a 100644 --- a/migration/options.c +++ b/migration/options.c @@ -1243,7 +1243,7 @@ static void migrate_params_apply(MigrateSetParameters *params, Error **errp) s->parameters.max_bandwidth = params->max_bandwidth; if (s->to_dst_file && !migration_in_postcopy()) { qemu_file_set_rate_limit(s->to_dst_file, - s->parameters.max_bandwidth / XFER_LIMIT_RATIO); + s->parameters.max_bandwidth); } } @@ -1275,7 +1275,7 @@ static void migrate_params_apply(MigrateSetParameters *params, Error **errp) s->parameters.max_postcopy_bandwidth = params->max_postcopy_bandwidth; if (s->to_dst_file && migration_in_postcopy()) { qemu_file_set_rate_limit(s->to_dst_file, - s->parameters.max_postcopy_bandwidth / XFER_LIMIT_RATIO); + s->parameters.max_postcopy_bandwidth); } } if (params->has_max_cpu_throttle) { diff --git a/migration/qemu-file.c b/migration/qemu-file.c index 745361d238..12cf7fb04e 100644 --- a/migration/qemu-file.c +++ b/migration/qemu-file.c @@ -29,6 +29,7 @@ #include "migration.h" #include "qemu-file.h" #include "trace.h" +#include "options.h" #include "qapi/error.h" #define IO_BUF_SIZE 32768 @@ -747,7 +748,10 @@ int64_t qemu_file_get_rate_limit(QEMUFile *f) void qemu_file_set_rate_limit(QEMUFile *f, int64_t limit) { - f->rate_limit_max = limit; + /* + * 'limit' is per second. But we check it each 100 miliseconds. + */ + f->rate_limit_max = limit / XFER_LIMIT_RATIO; } void qemu_file_reset_rate_limit(QEMUFile *f) -- 2.40.0