From b43b61d5bee522dadf44b472af71aab7235c13d5 Mon Sep 17 00:00:00 2001 From: Fabiano Rosas Date: Mon, 17 Jun 2024 15:57:26 -0300 Subject: migration: Add direct-io parameter Add the direct-io migration parameter that tells the migration code to use O_DIRECT when opening the migration stream file whenever possible. This is currently only used with the mapped-ram migration that has a clear window guaranteed to perform aligned writes. Acked-by: Markus Armbruster Reviewed-by: Peter Xu Signed-off-by: Fabiano Rosas --- migration/migration-hmp-cmds.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'migration/migration-hmp-cmds.c') diff --git a/migration/migration-hmp-cmds.c b/migration/migration-hmp-cmds.c index 9f0e8029e0..7d608d26e1 100644 --- a/migration/migration-hmp-cmds.c +++ b/migration/migration-hmp-cmds.c @@ -351,6 +351,13 @@ void hmp_info_migrate_parameters(Monitor *mon, const QDict *qdict) monitor_printf(mon, "%s: %s\n", MigrationParameter_str(MIGRATION_PARAMETER_MODE), qapi_enum_lookup(&MigMode_lookup, params->mode)); + + if (params->has_direct_io) { + monitor_printf(mon, "%s: %s\n", + MigrationParameter_str( + MIGRATION_PARAMETER_DIRECT_IO), + params->direct_io ? "on" : "off"); + } } qapi_free_MigrationParameters(params); @@ -624,6 +631,10 @@ void hmp_migrate_set_parameter(Monitor *mon, const QDict *qdict) p->has_mode = true; visit_type_MigMode(v, param, &p->mode, &err); break; + case MIGRATION_PARAMETER_DIRECT_IO: + p->has_direct_io = true; + visit_type_bool(v, param, &p->direct_io, &err); + break; default: assert(0); } -- cgit 1.4.1