commit 09f9ec99133ab5735b57486323d9c592630c9fc1
author Hyman Huang(黄勇) <yong.huang@smartx.com> Wed Jun 07 22:58:32 2023 +0800
committer Juan Quintela <quintela@redhat.com> Wed Jul 26 10:55:56 2023 +0200
tree 3d16c040f5a7038cf1b81c8d6296f94b279c9673
parent 4d8078571906932c496ddeda541fb4b026fd12f5

qapi/migration: Introduce vcpu-dirty-limit parameters

Introduce "vcpu-dirty-limit" migration parameter used
to limit dirty page rate during live migration.

"vcpu-dirty-limit" and "x-vcpu-dirty-limit-period" are
two dirty-limit-related migration parameters, which can
be set before and during live migration by qmp
migrate-set-parameters.

This two parameters are used to help implement the dirty
page rate limit algo of migration.

Signed-off-by: Hyman Huang(黄勇) <yong.huang@smartx.com>
Acked-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Message-Id: <168618975839.6361.17407633874747688653-3@git.sr.ht>
Signed-off-by: Juan Quintela <quintela@redhat.com>

migration/migration-hmp-cmds.c

diff --git a/migration/migration-hmp-cmds.c b/migration/migration-hmp-cmds.c
index 352e9ec..35e8020 100644
--- a/migration/migration-hmp-cmds.c
+++ b/migration/migration-hmp-cmds.c
@@ -368,6 +368,10 @@
         monitor_printf(mon, "%s: %" PRIu64 " ms\n",
         MigrationParameter_str(MIGRATION_PARAMETER_X_VCPU_DIRTY_LIMIT_PERIOD),
         params->x_vcpu_dirty_limit_period);
+
+        monitor_printf(mon, "%s: %" PRIu64 " MB/s\n",
+            MigrationParameter_str(MIGRATION_PARAMETER_VCPU_DIRTY_LIMIT),
+            params->vcpu_dirty_limit);
     }
 
     qapi_free_MigrationParameters(params);
@@ -628,6 +632,10 @@
         p->has_x_vcpu_dirty_limit_period = true;
         visit_type_size(v, param, &p->x_vcpu_dirty_limit_period, &err);
         break;
+    case MIGRATION_PARAMETER_VCPU_DIRTY_LIMIT:
+        p->has_vcpu_dirty_limit = true;
+        visit_type_size(v, param, &p->vcpu_dirty_limit, &err);
+        break;
     default:
         assert(0);
     }