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[PULL 12/41] migration/colo: Use ram_block_discard_disable()
From: |
Michael S. Tsirkin |
Subject: |
[PULL 12/41] migration/colo: Use ram_block_discard_disable() |
Date: |
Fri, 3 Jul 2020 05:04:01 -0400 |
From: David Hildenbrand <david@redhat.com>
COLO will copy all memory in a RAM block, disable discarding of RAM.
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Tested-by: Lukas Straub <lukasstraub2@web.de>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Hailiang Zhang <zhang.zhanghailiang@huawei.com>
Cc: Juan Quintela <quintela@redhat.com>
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20200626072248.78761-10-david@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
include/migration/colo.h | 2 +-
migration/migration.c | 8 +++++++-
migration/savevm.c | 11 +++++++++--
3 files changed, 17 insertions(+), 4 deletions(-)
diff --git a/include/migration/colo.h b/include/migration/colo.h
index 1636e6f907..768e1f04c3 100644
--- a/include/migration/colo.h
+++ b/include/migration/colo.h
@@ -25,7 +25,7 @@ void migrate_start_colo_process(MigrationState *s);
bool migration_in_colo_state(void);
/* loadvm */
-void migration_incoming_enable_colo(void);
+int migration_incoming_enable_colo(void);
void migration_incoming_disable_colo(void);
bool migration_incoming_colo_enabled(void);
void *colo_process_incoming_thread(void *opaque);
diff --git a/migration/migration.c b/migration/migration.c
index d365d82209..92e44e021e 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -338,12 +338,18 @@ bool migration_incoming_colo_enabled(void)
void migration_incoming_disable_colo(void)
{
+ ram_block_discard_disable(false);
migration_colo_enabled = false;
}
-void migration_incoming_enable_colo(void)
+int migration_incoming_enable_colo(void)
{
+ if (ram_block_discard_disable(true)) {
+ error_report("COLO: cannot disable RAM discard");
+ return -EBUSY;
+ }
migration_colo_enabled = true;
+ return 0;
}
void migrate_add_address(SocketAddress *address)
diff --git a/migration/savevm.c b/migration/savevm.c
index b979ea6e7f..6e01724605 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -2111,8 +2111,15 @@ static int
loadvm_handle_recv_bitmap(MigrationIncomingState *mis,
static int loadvm_process_enable_colo(MigrationIncomingState *mis)
{
- migration_incoming_enable_colo();
- return colo_init_ram_cache();
+ int ret = migration_incoming_enable_colo();
+
+ if (!ret) {
+ ret = colo_init_ram_cache();
+ if (ret) {
+ migration_incoming_disable_colo();
+ }
+ }
+ return ret;
}
/*
--
MST
- [PULL 34/41] vhost: implement vhost_dev_start method, (continued)
- [PULL 34/41] vhost: implement vhost_dev_start method, Michael S. Tsirkin, 2020/07/03
- [PULL 35/41] vhost: introduce new VhostOps vhost_vq_get_addr, Michael S. Tsirkin, 2020/07/03
- [PULL 36/41] vhost: implement vhost_vq_get_addr method, Michael S. Tsirkin, 2020/07/03
- [PULL 37/41] vhost: introduce new VhostOps vhost_force_iommu, Michael S. Tsirkin, 2020/07/03
- [PULL 39/41] vhost_net: introduce set_config & get_config, Michael S. Tsirkin, 2020/07/03
- [PULL 40/41] vhost-vdpa: introduce vhost-vdpa backend, Michael S. Tsirkin, 2020/07/03
- [PULL 41/41] vhost-vdpa: introduce vhost-vdpa net client, Michael S. Tsirkin, 2020/07/03
- [PULL 19/41] virtio-mem: Allow notifiers for size changes, Michael S. Tsirkin, 2020/07/03
- [PULL 12/41] migration/colo: Use ram_block_discard_disable(),
Michael S. Tsirkin <=
- [PULL 38/41] vhost: implement vhost_force_iommu method, Michael S. Tsirkin, 2020/07/03
- Re: [PULL 00/41] virtio,acpi: features, fixes, cleanups., no-reply, 2020/07/03
- Re: [PULL 00/41] virtio,acpi: features, fixes, cleanups., Michael S. Tsirkin, 2020/07/03
- Re: [PULL 00/41] virtio,acpi: features, fixes, cleanups., Peter Maydell, 2020/07/04